EM78P259N/260N
 Elan Microelectronics Corporation
 Contents
 TCC/WDT and Prescaler
Reset and Wake-up
Analog-To-Digital Converter ADC
6.1
 11.2
11.1
11.3
11.4
 Date
Doc. Version Revision Description
 Bit Microprocessor with OTP ROM
Features
General Description
 Pin Assignment
Block Diagram
Pin DIP/SOP
Pin DIP/SOP/SSOP
 EM78P259NP/M
Symbol Pin No Type Function
Pin Description
 EM78P260NP/M/KM
 Operational Registers
Function Description
1 R0 Indirect Address Register
2 R1 Time Clock /Counter
 EM78P259N/260N
 Cont
Bit Microprocessor with OTP ROM Data Memory Configuration
 Bit 4 T
5 R4 RAM Select Register
Bit
Bits 5~0
 6 R5 ~ R6 Port 5 ~ Port
Bit 7 ~ Bit 4 C3 ~ C0 Calibrator of internal RC mode
7 R7 Port
Bit 7 ~ Bit
 8 R8 Aisr ADC Input Select Register
 Bit 3 Adpd
9 R9 Adcon ADC Control Register
 RB Addata Converted Value of ADC
RA Adoc ADC Offset Calibration Register
Bit 5 ~ Bit 3 VOF2 ~ VOF0 Offset voltage bits
Bit 2 ~ Bit 0 Unimplemented, read as ‘0’
 RE Interrupt Status 2 & Wake-up Control Register
RC ADDATA1H Converted Value of ADC
RD ADDATA1L Converted Value of ADC
 All of these are 8-bit general-purpose registers
RF Interrupt Status 2 Register
16 R10 ~ R3F
 Control Register
Special Purpose Registers
Accumulator
 4 IOC80 Comparator and Tcca Control Register
3 IOC50 ~ IOC70 I/O Port Control Register
Bit 7 & Bit 6 Not used
Bit 4 & Bit 3 COS1 & COS0 Comparator/OP Select bits
 Bit 4 Tccbte Tccb signal edge
Bit 6 Tccben Tccb enable bit 0 = disable Tccb
Tccc signal source
Bit 0 Tcccte Tccc signal edge
 IOCA0 IR and Tccc Scale Control Register
 Bit 2 HF
Bit 3 IRE
Bit 1 LGP
Bit 0 Iroute
 IOCC0 Open-Drain Control Register
IOCB0 Pull-down Control Register
Bit PD57 PD56 PD55 PD54 PD53 PD52 PD51 PD50
Bit OD67 OD66 OD65 OD64 OD63 OD62 OD61 OD60
 Bit PH57 PH56 PH55 PH54 PH53 PH52 PH51 PH50
IOCD0 Pull-high Control Register
IOCE0 WDT Control & Interrupt Mask Registers
 = Disable Lpwtif interrupt
Lpwtif interrupt enable bit
= Enable Lpwtif interrupt
IOCF0 Interrupt Mask Register
 13 IOC61 Tccb Counter
12 IOC51 Tcca Counter
 15 IOC81 Tccc Counter
14 IOC71 TCCBH/MSB Counter
 IOCB1 High/Low Time Scale Control Register
16 IOC91 Low Time Register
IOCA1 High Time Register
 TCC prescaler counter can be read and written to
IOCC1 TCC Prescaler Counter
Bit 2 ~ Bit 0 LTS2 ~ LTS0 Low time scale bits
 TCC/WDT and Prescaler
 MUX
I/O Ports
 I/O Port and I/O Control Register Circuit for P60 /INT
 I/O Port and I/O Control Register Circuit for Port 50 ~ P57
 Reset and Wake-up Operation
Reset and Wake-up
Usage of Port 5 Input Change Wake-up/Interrupt Function
Wake-up Wake-up and Interrupt
 EM78P259N/260N
 Select Segment
 Signal Sleep Mode Normal Mode
 Comparator
 Following summarizes the initialized values for registers
Address Name Reset Type Bit
 Name Reset Type Bit
 HTR7 HTR6 HTR5 HTR4 HTR3 HTR2 HTR1 HTR0
 Aisr
 Tcif
Controller Reset Block Diagram
 Event
Interrupt
T and P Status under Status R3 Register
 EM78P259N/260N
 Interrupt Vector Interrupt Status Priority
Reti
 ADC Control Register AISR/R8, ADCON/R9, ADOC/RA
Analog-to-Digital Converter ADC
1.1 R8 Aisr ADC Input Select Register
Bit 7 ~ Bit 3 ADE3 Bit 2 ADE2
 P54
1.2 R9 Adcon AD Control Register
P54/TCC/VREF Pin Priority High Medium Low
 RA Adoc AD Offset Calibration Register
While the CPU is operating
= ADC is operating
 ADC Data Register ADDATA/RB, ADDATA1H/RC, ADDATA1L/RD
ADC Operation during Sleep Mode
ADC Sampling Time
AD Conversion Time
 Follow these steps to obtain data from the ADC
Programming Process/Considerations
Programming Process
 Define a Control Register
Sample Demo Programs Define a General Register
ADC Control Register
Define Bits in Adcon
 AD power on
 Overview
Infrared Remote Control Application/PWM Waveform Generation
 Fcarrier
Function Description
 IRE Irout
 Address Name Bit
Programming the Related Registers
IR/PWM Related Status/Data Registers
 EM78P259N/260N
 Under Tccb Counter IOC61
Timer/Counter
Under Tcca Counter IOC51
 Under Tccc Counter IOC81
 Related Tccx Status/Data Registers
Comparator
 Comparator Output
External Reference Signal
 Comparator Interrupt
Using a Comparator as an Operation Amplifier
Wake-up from Sleep Mode
 Oscillator Modes
Oscillator
Oscillator Modes
Conditions
 Frequency C1pF C2pF
Crystal Oscillator/Ceramic Resonators Crystal
Oscillator Type
 18 Serial Mode Crystal/Resonator Circuit Diagram
External RC Oscillator Mode
 Internal Drift Rate RC Frequency Temperature
Internal RC Oscillator Mode
Cext Rext Average Fosc 5V, 25C Average Fosc 3V, 25C
40C ~ +85C 3V~5.5V Total
 Programmable WDT Time-out Period
Power-on Considerations
External Power-on Reset Circuit
 Vdd
Residual Voltage Protection
EM78P259N
EM78P260N
 Code Option Register Word
Code Option
Word Word1 Bit12 ~ Bit0
Word Bit Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit
 = Pulses equal to 32/fc s is regarded as signal default
= Pulses equal to 8/fc s is regarded as signal
Bit Microprocessor with OTP ROM Bit 3 HLP
Bit 2 ~ 0 PR2 ~ PR0 Protect Bits
 Customer ID Register Word
Bit 1 & Bit 0 RCM1, RCM0 RC mode selection bits
Instruction Set
 Mnemonic Operation Status Affected
Following are the EM78P259N/260N instruction set
Instruction Binary
 Items Rating
Absolute Maximum Ratings
 Ta=25 C, VDD=5.0V±5%, VSS=0V
DC Electrical Characteristics
Symbol Parameter Condition Min Typ Max Unit
 Voltage Min Typ Max
Internal RC Drift Rate
 Vdd=2.5V to 5.5V, Vss=0V, Ta=25C
AD Converter Characteristics
 Vdd = 5.0V, Vss=0V, Ta=25C
Comparator OP Characteristics
Device Characteristics
 Ta=25C, VDD=5V±5%, VSS=0V
AC Electrical Characteristic
Symbol Parameter Conditions Min Typ Max Unit
 Reset Timing CLK=0
Timing Diagrams
AC Test Input/Output Waveform
TCC Input Timing CLKS=0
 Package Information
Package Type
18-Lead Plastic Dual in line Pdip 300 mil
Package Type Pin Count Package Size
 838
18-Lead Plastic Small Outline SOP 300 mil
 650
Lead Plastic Shrink Small Outline Ssop 209 mil
 Lead Plastic Dual-in-line Pdip 300 mil
 Lead Plastic Small Outline SOP 300 mil
 Test Category Test Conditions Remarks
Quality Assurance and Reliability
Address Trap Detect