Block Diagram
General Description
MAY
National Semiconductor Corporation
Table of Contents
Features
Device Overview
Bluetooth LLC
Can Interface
Quad Uart
Advanced Audio Interface
MICROWIRE/SPI
ACCESS.BUS Interface
MULTI-FUNCTION Timer
Versatile Timer Unit
Power Management
DMA Controller
Serial Debug Interface
Development Support
Signal Descriptions
CP3BT26
LQFP-128
LQFP-144
Reset
X1CKI
Bbclk
X1CKO
Name Pins Primary Function Alternate Alternate Function
PG4
Sdat
PG5
PG6
X1CKI
Selio
WR0
WR1
CTS PE4
SLE
CPU Architecture
GENERAL-PURPOSE Registers
Dedicated Address Registers
Processor Status Register PSR
Interrupt Base Register Intbase
12 11 Reserved
No carry or borrow occurred Carry or borrow occurred
Configuration Register CFG
When the IDT has 16-bit entries, and all ex
Mode for the CR16B large model.
Is held in the Intbase register, which is not
Addressing Modes
Addb R1, R2
Loadw 12R5, R6
Stacks
Instruction SET
Instruction Set Summary Mnemonic Operands Description
Ashud
Lshd
Tbit
LPR
Retx
Push
POP
Popret
Stormp
Eiwait
NOP
Wait
Memory
Operating Environment
IN/A
BUS Interface Unit BIU
BUS Cycles
BIU Control Registers
Empty
2 I/O Zone Configuration Register Iocfg
Static Zone 0 Configuration Register SZCFG0
Static Zone 1 Configuration Register SZCFG1
Static Zone 2 Configuration Register SZCFG2
WBR RBE Hold Wait Ipst
Access to Peripherals
Wait and Hold States
Flash Program/Data Memory
RAM Memory
System Configuration Registers
Module Configuration Register Mcfg
System Configuration Registers Name Address Description
Software Reset Register Swreset
Module Status Register Mstat
Flash Memory
Flash Memory Protection
Flash Memory Organization
Flash Memory Operations
Main Block Page Erase
Main Block Module Erase
Information Block Module Erase
Main Block Write
Boot
Information Block Words
Area
CPU Reset Behavior
Boot Area Start-Up Operation
Flash Memory Interface Registers
Empty Ispe
Flash Memory 0 Write Enable Register FM0WER/FSM0WER
Flash Memory 1 Write Enable Register FM1WER
Flash Memory Information Block Data Register
FMIBDR/FSMIBDR
Flash Data Memory 0 Write Enable Register FSM0WER
Flash Memory Control Register Fmctrl
Fsmctrl
Fsmstat
Fsmpsr
FMSTART/FSMSTART
Flash Memory End Time Reload Register FMEND/FSMEND
FMRCV/FSMRCV FSMAR1
Flash Memory Auto-Read Register 0 FMAR0/ FSMAR0
Flash Memory Auto-Read Register 2 FMAR2/ FSMAR2
DMA Controller
Channel Assignment
Transfer Types
DMA Channel Assignment Peripheral Trans Register Action
Operation Modes
Debug Mode
Software DMA Request
DMA Controller Register SET
Device a Address Counter Register ADCAn
Device a Address Register ADRAn
Device B Address Counter Register ADCBn
Device B Address Register ADRBn
Block Length Register BLTRn
DMA Control Register DMACNTLn
DMA Status Register Dmastat
VLD Chac OVR
VLD
Interrupts
NON-MASKABLE Interrupts
Maskable Interrupts
Interrupt Controller Registers
Interrupt Vector Register Ivct
External NMI Trap Control and Status Register Exnmi
Non-Maskable Interrupt Status Register Nmistat
Interrupt Enable and Mask Register 1 IENAM1
Interrupt Enable and Mask Register 2 IENAM2
Interrupt Status Register 1 ISTAT1
Interrupt Status Register 2 ISTAT2
Maskable Interrupt Sources
Nested Interrupts
Maskable Interrupts Assignment IRQ Number Description
IRQ Number Description
Triple Clock and Reset
Triple Clock and Reset Module
External Crystal Network
Crystal Resonance Frequency
Type
Capacitor C1, C2 Capacitance
Main Clock
Slow Clock
PLL Clock
Min. Q factor
POWER-ON Reset
External Reset
Clock and Reset Registers
System Clock
MODE20
Power Management
Active Mode
Power Save Mode
Module Activity Summary Power Mode Clock
Idle Mode Power Management Registers
Halt Mode
Power Management Registers Name Address Description
Power Management Control Register Pmmcr
DHC
Hccm
Hcch
Active Mode to Power Save Mode
OHC OMC OLC
OHC
Entering Idle Mode
Entering Halt Mode
Software-Controlled Transition to Active Mode
Wake-Up Transition to Active Mode
Multi-Input Wake-Up Module Block Diagram
Multi-Input Wake-Up
MULTI-INPUT WAKE-UP Registers
Miwu Sources
Miwu Channel
Multi-Input Wake-Up Registers Name Address Description
Wake-Up Interrupt Enable Register WK0IENA
Wake-Up 1 Interrupt Enable Register WK1IENA
Wake-Up Enable Register WK0ENA
Wake-Up 1 Edge Detection Register WK1EDG
Wake-Up Interrupt Control Register
WK0ICTL1 WK0ICTL2
Wake-Up 1 Interrupt Control Register
WK1ICTL1 WK1ICTL2
Wake-Up Pending Register WK0PND
Wake-Up Pending Clear Register WK0PCL
Wake-Up 1 Pending Register WK1PND
Wake-Up 1 Pending Clear Register WK1PCL
Programming Procedures
Input/Output Ports
Port Registers
Port Registers
Address Description
Port Alternate Function Register PxALT
Port Data Input Register PxDIN
Port Data Output Register PxDOUT
Port Direction Register PxDIR
Port High Drive Strength Register PxHDRV
Port Alternate Function Select Register PxALTS
Alternate Function Select
Port Pin PxALTS =
OPEN-DRAIN Operation
Bluetooth Controller
RF Interface
X1CKI/BBCLK
Rfdata
Serial Interface
Rfce
Sclk
Sdat
Write Operation
Serial Interface Write Timing Read Operation
Bit, and register address for a read cycle. In the second
First part of read cycle driven by CP3BT26. Address is 0Ah
15.3 LMX5251 POWER-UP Sequence
15.4 LMX5252 POWER-UP Sequence
Bluetooth Sleep Mode
Bluetooth Global Registers
Bluetooth Sequencer RAM
Bluetooth Shared Data RAM
16.0 12-Bit Analog to Digital Converter
Functional Description
Data Path
Operation
ADC Clock Generation
ADC Voltage References
Pen-Down Detector
Touchscreen Driver Configuration
Touchscreen Interface
Measuring Pen Force
RX2
RY2
RYP
ADC Operation in POWER-SAVING Modes
Freeze
ADC Register SET
ADC Registers Name Address Description
Muxcfg
Touchcfg ADC0/TSX+ ADC1/TSY+ ADC2/TSX ADC3/TSY
Prefcfg
Nrefcfg
Clkdiv
ADC Start Conversion Delay Register Adcscdly
ADC Conversion Control Register Adccntrl
ADC Start Conversion Register Adcstart
ADC Result Register Adcreslt
Adcresult
Adcoflw
Sign
RNG Module Block Diagram
Random Number Generator RNG
Random Number Generator Register SET
USB Controller
Functional States
Endpoint Operation
TX Fifo RX Fifo
Bidirectional Control Endpoint FIFO0 Operation
Transmit Endpoint Fifo Operation TXFIFO1, TXFIFO2, TXFIFO3
USB Controller Registers
Receive Endpoint Fifo Operation RXFIFO1, RXFIFO2, RXFIFO3
USB Controller Registers Name Address Description
Main Control Register Mcntrl
Node Functional State Register Nfsr
NFS
USB Functional States
NFS
Main Event Register Maev
Main Mask Register Mamsk
Alternate Event Register Altev
Alternate Mask Register Altmsk
Transmit Event Register Txev
Transmit Mask Register Txmsk
Receive Event Register Rxev NAK Event Register Nakev
Receive Mask Register Rxmsk
NAK Mask Register Nakmsk
Fifo Warning Event Register Fwev
Frame Number High Byte Register FNH
Fifo Warning Mask Register Fwmsk
Dsrc
DMA Event Register Dmaev
DMA Error Register Dmaerr
DMA Mask Register Dmamsk
Mirror Register MIR
DMA Count Register Dmacnt
Transmit Command 0 Register TXC0
Endpoint Control 0 Register EPC0
Transmit Status 0 Register TXS0
Receive Command 0 Register RXC0
Transmit Data 0 Register TXD0
Receive Status 0 Register RXS0
Receive Data 0 Register RXD0
Endpoint Control Register n EPCn
Transmit Status Register n TXSn
Transmit Command Register n TXCn
Tfwl
Last
RFF
Transmit Fifo Warning Limit
Receive Status Register n RXSn
Tfwl
Bytes Remaining in Fifo
Receive Command Register n RXCn Receive Data Register n RXD
Transceiver Interface
Receive Fifo Warning Limit
Rfwl
Can Module
Can Block Diagram
Basic can Concepts
Can Frame Types
Can Frame Fields
Start of Frame SOF
Arbitration Field
Data Length Code DLC
Data Field
Cyclic Redundancy Check CRC
ACK Field
Remote Frame
Data Field
Cyclic Redundancy Check Field CRC
Error Frame
Error Frame Overload Frame
Stuff Error
Form Error
Bit CRC Error
Acknowledgment Error
Error Active
Error Warning
Error Passive
Error Counters
Bit Time Logic
Can Bit Time
Synchronization
Bit Timing
Message Transfer
CKI
Acceptance Filtering
Example 1 Acceptance of a Single Identifier
Two 32-bit masks are used to filter unwanted messages
From the can bus Gmask and BMASK. shows
Receive Structure
120
Receive Procedure
Receive Timing
Writing to Buffer Status Code During
Rxbusy
Buffer Read Routine Bufflock Enabled
122
Transmit Structure
Transmit Scheduling
Transmit Priority
Txpri
PRI
Interrupts
TX Buffer States
Time Stamp Counter
IRQ IST3 IST2 IST1 IST0
CPU Access to can Registers/Memory
Memory Organization
Message Buffer Organization
Message Buffer Map Address Register
Can Controller Registers
Can Controller Registers Name Address Description
Buffer Status/Control Register Cnstat
Buffer Status Section of the Cnstat Register
ST3 DIR ST2 ST1 ST0 Busy
Buffer Status
Data Length Coding
DLC
Storage of Standard Messages
Standard Frame with 8 Data Bytes Address Buffer Register
Extended Messages with 8 Data Bytes Address Buffer Register
Cnstat DLC
PRI SRR
Frame is received, the contents of these registers will be
Contents of these registers are ignored. If a remote
Storage of Remote Messages
Extended Remote Frame Address Buffer Register
Can Global Configuration Register Cgcr
Listen Only bit can be used to configure
When the Ignore Acknowledge bit is set,
When the Loopback bit is set, all messages
Dress, as shown in Figure
SJW
TSEG1
TSEG2
RTR IDE
Xrtr
Can Interrupt Enable Register Cien
Basic Mask Register BMSKB/BMSKX
Basic Mask BM2818
BM170
IRQ
Can Error Counter Register Canec
Can Error Diagnostic Register Cediag
Error Field Identifier
EFID30
Can Timer Register Ctmr
External can Pins Signal Name Type Description
System START-UP and MULTI-INPUT WAKE-UP
External Connection
Minimum Clock Frequency Requirements Baud Rate
Bit Time Logic Calculation Examples
Acceptance Filter Considerations
Remote Frames
Usage Hint
Audio Interface Signals
Advanced Audio Interface
Audio Interface Modes
Synchronous Mode
Normal Mode
DMA Support
145
Clock Configuration
Frame Clock Generation
BIT Clock Generation
Audio Interface Operation
Transmit
DMA Operation
Fifo Operation
Receive
Frame Sync Signal
Communication Options
Data Word Length
Audio Control Data
Short and Long Frame Sync Pulses
IOM-2 Mode
Loopback Mode
150
Freeze Mode
Audio Interface Registers
Audio Interface Registers Name Address Description
Audio Receive Fifo Register Arfr
Audio Transmit Fifo Register Atfr
Audio Receive DMA Register n ARDRn
Audio Transmit DMA Register n ATDRn
Audio Global Configuration Register Agcr
Slots per Mode Frame
SCS
FSL
Audio Interrupt Status and Control Register Aiscr
Txeip Txip Rxeip Rxip Txeie Txie Rxeie Rxie
Txeic Txic Rxeic Rxic Rxie
Txeip
Rxsa Bit Slots Enabled
Rxdsa Bit Slots Enabled For DMA
Audio Receive Status and Control Register Arscr
Txsa Bit Slots Enabled
Txdsa Bit Slots Enabled For DMA
Audio Transmit Status and Control Register Atscr
Audio Clock Control Register Accr
Audio DMA Control Register Admacr
RMD
DMA Request Condition
CVSD/PCM Conversion Module
Operation
PCM Conversions
Cvsd Conversion
PCM to Cvsd Conversion
Cvsd to PCM Conversion
Interrupt Generation
CVSD/PCM Converter Registers
Linearout
Cvsd Status Register Cvstat
Uart Modules
Functional Overview
Uart Operation
Uart Block Diagram
Uart Asynchronous Communication
Diagnostic Mode
Frame Format Selection
Prescaler Factors
Prescaler Factor
Break Generation and Detection
Parity Generation and Detection
Uart Registers
Uart Registers Name Address Description
Uart Baud Rate Divisor UnBAUD
Uart Receive Data Buffer UnRBUF
Uart Transmit Data Buffer UnTBUF
Uart Frame Select Register UnFRS
Uart Mode Select Register 1 UnMDSL1
Uart Status Register UnSTAT
Uart Interrupt Control Register UnICTRL
Uart Oversample Rate Register UnOVR
UOVSR30
Oversampling Rate
Uart Mode Select Register 2 UnMDSL2
Baud Rate Calculations
Uart Sample Position Register UnSPOS
Oversampling Rate Sample Position
173
174
Microwire/SPI Interface
Microwire Operation
Microwire Interface
Shifting
Writing
Clocking Modes
Master Mode
Normal Mode Scidl =
Slave Mode
Microwire Interrupt Trigger Condition Status Enable Bit
MWCTRL1
Microwire Interface Registers
Mwen
Microwire Status Register Mwstat
SCM
Scdv
OVR RBF BSY
ACCESS.bus Interface
ACB Protocol Overview
Data Transactions
Start and Stop
Acknowledge Cycle
Addressing Transfer Formats
Arbitration on the Bus
ACB Functional Description
Master Error Detections
Bus Idle Error Recovery
Slave Mode
Slave Error Detections
ACCESS.BUS Interface Registers
ACB Control Status Register Acbcst
Tgscl
ACB Control Register 1 ACBCTL1
Start
Stop
ACB Control Register 2 ACBCTL2
ACB Control Register 3 ACBCTL3
Usage Hints
ACB Own Address Register 1 ACBADDR1
Saen Addr
Saen
Avoiding Bus Error During Write Transaction
190
191
Timer T0 Operation
Timing and Watchdog Module
TWM Structure
Power Save Mode Operation
Watchdog Operation
TWM Registers
Register Locking
Mdiv
T0IN
Watchdog Programming Procedure
Watchdog Service Data Match Register Wdsdm
TWMT0 Control and Status Register T0CSR
Watchdog Count Register Wdcnt
Multi-Function Timer
Timer Structure
Clock Source Block
196
Timer Operating Modes
Pulse Accumulate Mode
Limitations in Low-Power Modes
Counter Clock Source Select
Mode 1 Processor-Independent PWM
198
Mode 2 Dual Input Capture
Dual-Input Capture Mode
Mode 3 Dual Independent Timer/Counter
200
Mode 4 Input Capture Plus Timer
Input Capture Plus Timer Mode
Timer Interrupts
Timer I/O Functions
Taen
Tben
Timer Registers
Timer Mode Control Register Tctrl
Reload/Capture a Register Tcra
Reload/Capture B Register Tcrb
Timer Interrupt Control Register Tictl
Timer Interrupt Clear Register Ticlr
Versatile Timer Unit VTU
VTU Functional Description
206
Dual 8-bit PWM Mode
VTU PWM Generation
VTU 16-bit PWM Mode Dual 16-Bit Capture Mode
208
VTU Dual 16-bit Capture Mode Low Power Mode
ISE Mode operation
Mode Control Register Mode
VTU Registers
VTU Registers Name Address Description
CxEDG Capture Counter Reset
Interrupt Control Register Intctl
Clock Prescaler Register 1 CLK1PS
Interrupt Pending Register Intpnd
Clock Prescaler Register 2 CLK2PS
Counter Register n COUNTx
CNTx
Duty Cycle/Capture Register n DTYCAPx
Period/Capture Register n PERCAPx
Bluetooth LLC Registers
Register Map
Register Name Size Address Access Value After Comments Type
USB Node Registers
EPC1
TXC1
EPC2
EPC4
Can Module Message Buffers
Can Registers
DMA Controller
Bus Interface Unit
System Configuration
Flash Program Memory Interface
Flash Data Memory Interface
Triple Clock + Reset
CVSD/PCM Converter
Multi-Input Wake-Up
General-Purpose I/O Ports
Register Name Size Address
Comments Type
Advanced Audio Interface
Interrupt Control Unit
UART0
UART1
UART2
UART3
ACCESS.bus
Multi-Function Timer
Timing and Watchdog
Versatile Timer Unit
ADC
RNG
Rngcst
Rngd
Word FF F284h
Register Bit Fields
USB
Setup Toggle Rxlast Rcount RXC0
IGN Ignout Rxen Setup EPC1
Nakev OUT Nakmsk Fwev RXWARN31
Fwmsk RXWARN31
Can
Control Status
Memory Registers
Dmac
System Configuration Registers
BIU
TBI Register
Flash
Flash Data Memory
CVSD/PCM
CLK3RES
PMM Register
MIWU16
Gpio Registers
AAI
ICU Registers
Uart
MWSPI16
ACB Registers
MFT16
VTU
Rngcst
Imsk
Rngd
Rngdivh
Electrical Characteristics
Symbol Parameter Conditions Min Max Units
Absolute Maximum Ratings
TBD
IOOff
Symbol Parameter Conditions Min Typ Max Units
INL
LSB
DNL
Flash Memory ON-CHIP Programming
Output Signal Levels
Clock and Reset Timing
Reset and NMI Input Signals
TRI-STATE
NMI Signal Timing
Clock Timing
Uart Output Signals
Uart Timing
Port Output Signals
30.9 I/O Port Timing
AAI Output Signals
Advanced Audio Interface AAI Timing
Transmit Timing, Short Frame Sync
Receive Timing, Long Frame Sync
MICROWIRE/SPI Timing
Microwire/SPI Signals Symbol Description Reference Min ns
Microwire/SPI Input Signals
Microwire/SPI Output Signals
Normal Mode After FE on
Microwire Data Out Valid
Alternate Mode After RE On MSK Propagation Time
254
255
Microwire Transaction Timing, Alternate Mode, Scidl =
256
257
ACCESS.BUS Timing
ACCESS.bus Output Signals
259
ACB Data Timing
260
USB Port AC Characteristics
MULTI-FUNCTION Timer MFT Timing
Versatile Timing Unit VTU Timing
TIOx Input High Time Rising Edge RE on CLK
TIOx Input Low Time RE on CLK
262
External Bus Output Signals
External BUS Timing
Early Write Between Normal Read Cycles No Wait States
264
265
Consecutive Normal Read Cycles Burst, No Wait States
266
267
Early Write Between Fast Read Cycles
268
Pin Assignments
LQFP-128 Package
PWR
X1CKO X1CKI
Reset TMS
Avcc PWR Adgnd Advcc Uvcc
X2CKI X2CKO ENV2
SDA ADC0 TSX+
PE0 RXD0 Gpio PE1 TXD0 PE2 RTS PE3 CTS PE4 CKX/TB PE5
SRFS/NMI
PF0 MSK/TIO1
PF1 MDIDO/TIO2
LQFP-144 Package
272
SCL SDA ADC0 TSX+
ADC4 MUXOUT0
ADC5 MUXOUT1
ADC7 Adcin
Pin Name Alternate Functions Pin Number Type
A22 A21 A20 A19 A18 A17 A16 A15 A14 A13
A12
A11
A10
Revision History
Revision History
Date Major Changes From Previous Version
Physical Dimensions millimeters unless otherwise noted
LQFP-128 Package LQFP-144 Package
Form when properly used in accordance with instructions
Life Support Policy
Banned Substance Compliance