IBM EM78P809N manual Uart Universal Asynchronous Receiver/Transmitter, Registers for Uart Circuit

Page 37

EM78P809N

8-Bit Microcontroller

4.7 UART (Universal Asynchronous Receiver/Transmitter)

Registers for UART Circuit

R_BANK Address NAME Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1

Bit 0

BANK 2

0X05

URC1

URTD8

UMODE1

UMODE0

BRATE2

BRATE1

BRATE0

UTBE

TXE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R/W

R/W

R/W

R/W

R/W

R/W

R

R/W

 

 

 

 

 

 

 

 

 

 

 

BANK 2

0X06

URC2

0

0

SBIM1

SBIM0

UINVEN

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

--

--

R/W

R/W

R/W

--

--

--

 

 

 

 

 

 

 

 

 

 

 

BANK 2

0X07

URS

URRD8

EVEN

PRE

PRERR

OVERR

FMERR

URBF

RXE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R/W

R/W

R/W

R/W

R/W

R/W

R

R/W

 

 

 

 

 

 

 

 

 

 

 

BANK 2

0X08

URRD

URRD7

URRD6

URRD5

URRD4

URRD3

URRD2

URRD1

URRD0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

R

R

R

R

R

R

R

 

 

 

 

 

 

 

 

 

 

 

BANK 2

0X09

URTD

URTD 7

URTD 6

URTD 5

URTD 4

URTD 3

URTD 2

URTD 1

URTD0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

W

W

W

W

W

W

W

 

 

 

 

 

 

 

 

 

 

 

BANK 0

0x0F

ISFR2

0

UERRIF

RBFF

TBEF

TBIF

EXIF1

0

TCIF0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

--

R/W

R/W

R/W

R/W

R/W

--

R/W

 

 

 

 

 

 

 

 

 

 

 

SFR

0x0F

IMR2

0

UERRIE

URIE

UTIE

TBIE

EXIE1

0

TCIE0

 

 

 

--

R/W

R/W

R/W

R/W

R/W

--

R/W

 

 

 

 

 

 

 

 

 

 

 

TC4

 

 

Fsystem

Selector

Baud rate

 

 

generator

RXE

RX Control

Interrupt

 

 

Control

 

 

 

RX

 

 

 

RX shift register

Parity control

UINVEN URRD8

URRD

 

Error flag

 

 

 

Data Bus

TX Control

TXE

 

 

TX

URTD8 URTD

UINVEN

Fig. 11. Function Block Diagram

Product Specification (V1.0) 07.26.2005

• 33

(This specification is subject to change without further notice)

Page 36 Page 38
Image 37
Page 36 Page 38
Contents DOC. Version EM78P809NElan Microelectronics Corporation Contents Specification Revision History Bit Microcontroller CPU„ General purpose ApplicationsPin Assignment OTP Programming Pins Function Description Functional Block DiagramTbktc Operating RegistersR2/PC − Program Counter & Stack Address 02h R1/TCC − Time Clock /Counter Address 01hBit 7 ~ Bit 6 RBS1 ~ RBS0 R-Register page select R3/SR − Status Register Address 03hBit 5 Not used RBS1 RBS0GRBS1 GRBS0 Bit 0 C Carry flag R4/RSR − RAM Select Register Address 04hGeneral Purpose Register Bank Address 20H ~ 3FH PORT6 − Port 6 I/O Data Register Address 06h SIS = 0 Idle mode SIS = 1 Sleep modePORT7 Port 7 I/O Data Register Address 07h PORT8 − Port 8 I/O Data Register Address 08hTC4S = 1 Start TC4CR Timer/Counter 4 Control Register Address 0BhTC4FF1 TC4FF0 TC4CK2 TC4CK1 TC4CK0ISFR1 − Interrupt Status Flag Register 1 Address 0Eh Bit Microcontroller TC4D − Timer 4 Data Buffer Address 0ChTC3CAP = Bit 7 TC3CAP Software capture controlTC3S = 1 Start TC3CAP TC3S TC3CK1 TC3CK0 TC3MTC2M = 1 Window mode TC3DB − Timer 3 Data Buffer B Address 07hBit 7 ~ Bit 6 ADD1 ~ ADD0 AD low 2-bit data buffer TC2S = 1 StartTC2DL − Timer 2 Data Buffer Low Byte Address 0Ah TC2DH − Timer 2 Data Buffer High Byte Address 09hAdcr − AD Control Register Address 0Bh Bit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable control Bit 3 ADP AD power controlAdic − AD Input Pin Control Address 0Ch Addh − AD High 8-bit Data Buffer Address 0DhTEN = 0 Disable TEN = 1 Enable Bit 7 TEN Keytone enable controlBit 3 Tbten Time Base Timer Enable Control Bit Microcontroller Tbktc − TBT/Keytone Control Address 0EhUinven = 0 Disable TXD and RXD port inverse output Bit 3 Uinven Enable Uart TXD and RXD port inverse outputUinven = 1 Enable TXD and RXD port inverse output Bit 4 ~ Bit 2 BRATE2 ~ BRATE1 Transmit Baud Rate SelectBit Microcontroller URS − Uart Status Register Address 07h Bit 5 PRE Enable parity additionEven = 0 Odd parity Even = 1 Even parity EDS = 0 Rising edge EDS = 1 Falling edge Bit 2 EDS Data shift out edge selectSMP Dcol BRS2 BRS1 EDS Dord WBESPIC2 − SPI Control Register 2 Address 06h Transfer ModeSpid SPI Data Buffer Address 07h SPID7 SPID6 SPID5 SPID4 SPID3 SPID2 SPID1 SPID0PLC1 Pull Low Control Register 1 Address 0Bh PLE7x = 1 Disable P7x pull lowPHC2 − Pull High Control Register 2 Address 0Ch PLC2 − Pull Low Control 2 Address 0DhAccumulator Special Purpose RegistersControl Register Bit 7 Wdto WDT output selectIntcr − INT Control Register Address 0Bh Bit Microcontroller IOC6 ~ IOC9 − I/O Port Control RegisterBit 2 Reserved INT1ES = 0 Rising edge INT1ES = 1 Falling edgeExternal Interrupt INT Pin Secondary Enable Condition Function PinAdoscr − AD Offset Control Register Address 0Ch EdgeUerrie Urie Utie Tbie EXIE1 TCIE0 IMR2 − Interrupt Mask Register 2 Address 0FhRegisters for CPU operation mode CPU Operation ModeRbank Register Bank bits 7, 6 of R3, R/W Read/Write RbankOperation Mode Mode Switching ControlNormal → Don’t care → Interrupt request flag will be recorded AD ConverterRegisters for AD Converter Circuit Sampling Time ADC Data RegisterConversion Time ADCK10 Time Base Timer and Keytone GeneratorMax. Frequency Max. Conversion Rate per Bit Tone Output Pin Timing Chart Registers for Uart Circuit Uart Universal Asynchronous Receiver/TransmitterRbank Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit Data Format in Uart Uart ModeReceiving TransmittingBaud Rate Generator SPI Serial Peripheral InterfaceRegisters for the SPI Circuit Transfer Mode Shift Direction and Sample PhaseBit Transmit Mode Serial ClockBit Transmit/Receive Mode Bit Microcontroller Bit Receive ModeMultiple Device Connect /SS SCK pinRegisters for Timer/Counter 2 Circuit Timer/CounterRbank Address Name Bit 7 Bit 6 Bit Counter Mode Timer ModeWindow Mode Registers for Timer/Counter 3 Circuit Window Mode Timing ChartConfiguration of Timer/Counter3 Capture modeTCIF4 Registers for Timer 4 CircuitTCR4 PDO Mode12 TCC/WDT & Prescaler PWM ModeTC4 Interrupt Reset Reset and Wake-up13 I/O Ports Wake-up from Idle mode Wake-up from Sleep ModeAll interrupt Summary of the Initialized Values for Registers Address Name Reset Type BitSCR Bit Microcontroller Register BankTC2D9 TC2D8 Register Bank Reset Type Previous value before resetStatus of RST, T, and P of Status Register Bit Microcontroller General Purpose RegistersInterrupt Controller Reset Block DiagramOscillator Modes OscillatorCrystal Oscillator/Ceramic Resonators Crystal Summary of Maximum Operating SpeedsEM78P809N Oscillator Type Frequency Mode C1 pF C2 pFExt. Clock 740Crystal/Resonator-Parallel Mode Circuit External RC Oscillator ModeCode Option Register Enwdtb = 0 Enable Enwdtb = 1 DisableCode Option Register Word For design reference onlyExternal Power-on Reset Circuit Power-on ConsiderationsCustomer ID Register Cyes = 0 One cycle Cyes = 1 Two cyclesVdd Residue-Voltage ProtectionEM78P809N Rin Vdd EM78P809NVdd 40KR2 Instruction SetDEC Binary Instruction Hex Mnemonic Operation Status AffectedAbsolute Maximum Ratings Symbol Parameter Condition Min Typ Max UnitRecommended Operating Conditions Vss =Ta= 25 C, VDD= 5.0V ± 5%, VSS= DC Electrical CharacteristicsTypical value is based on characterization results at 25C Ta= 25 C, VDD= 3.0V ± 5%, VSS= Varef Symbol Parameter Conditions Min Typ Max Unit AC Electrical CharacteristicTa=- 40C ~ 85 C, VDD=5V ± 5%, VSS=0V = selected prescaler ratioAC Test Input/Output Waveform Timing DiagramOTP MCU Package TypesPin Count Package Size Contents III EM78P809N
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