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IBM EM78P312N manual Bit Microcontroller, 8 TBT Configuration, 9 Time Base Timer Timing Chart

Models: EM78P312N

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EM78P312N

8-Bit Microcontroller

Fosc/223
Fosc/221
Fosc/216
Fosc/214	MUX
13	MUX
Fosc/2

Fosc/212

Fosc/211

Fosc/29

TBTEN

TBTCK2:0	3

TBKTC

Falling Edge

Detector

TBT

Interrupt

Fig. 5-8 TBT Configuration

The Time Base Timer is used to generate the base time for key scan or dynamic display processing. The interrupt is generated in the first falling edge of the source clock after TBTEN is set to “1”.

Source Clock

TBTEN

TBT Interrupt

Fig. 5-9 Time Base Timer Timing Chart

Product Specification (V1.0) 10.03.2006

• 27

(This specification is subject to change without further notice)

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IBM EM78P312N manual Bit Microcontroller, 8 TBT Configuration, 9 Time Base Timer Timing Chart

Contents

ELAN MICROELECTRONICS CORP Green Product SpecificationEM78P312N 8-BIT MicrocontrollerCopyright 2006 by ELAN Microelectronics Corporation ELAN MICROELECTRONICS CORPORATIONAll Rights Reserved Pin Assignment ContentsFeatures General DescriptionAPPENDIX Specification Revision HistoryEM78P312N 2 Features1 General Description Pin Assignment8-Bit Microcontroller Pin DescriptionSymbol EM78P312NThis specification is subject to change without further notice 5.1 Functional Block Diagram5 Function Description Fig. 5-1 Functional Block Diagram8-Bit Microcontroller 5.2 Operating RegistersThis specification is subject to change without further notice EM78P312NR2 Program Counter & Stack EM78P312N8-Bit Microcontroller R0 Indirect Addressing Register R1 Time Clock /CounterR3 Status Register EM78P312N8-Bit Microcontroller User Memory SpaceR5 System Control Register EM78P312N8-Bit Microcontroller Bit 0 C Carry flag R4 RAM Select Register8-Bit Microcontroller R6 Port 6 I/O Data Register RB Timer/Counter 4 Control RegisterBit 7 ~ Bit 6 TC4FF1 ~ TC4FF0 Timer/Counter 4 flip-flop control EM78P312N8-Bit Microcontroller Bit 4 ~ Bit 2 TC4CK2 ~ TC4CK 0 Timer/Counter 4 Clock Source SelectRC Timer 4 Data Buffer EM78P312N8-Bit Microcontroller RE Interrupt Status Flag Register EM78P312NRFInterrupt Status Flag Register Bank 1 R7 TC3DB Timer 3 Data Buffer B Bank 1 R5 TC3CR Timer/Counter 3 Control RegisterBit 5 ~ Bit 4 TC3CK1 ~ TC3CK0 Timer/Counter 3 Clock Source Select TC3M = “1” Capture mode Bank 1 R6 TC3DA Timer 3 Data Buffer ATC2M Timer/Counter 2 mode select Bit 2 ~ Bit 0 TC2CK2 ~ TC2CK0 Timer/Counter 2 Clock Source SelectBank 1 R9 TC2DH Timer 2 Data Buffer High Byte Bank 1 RA TC2DL Timer 2 Data Buffer Low Byte8-Bit Microcontroller ADP = “0” Power on ADP = “1” Power downBit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable control EM78P312NEM78P312N TEN = “0” Disable TEN = “1” EnableTBTEN = “0” Disable TBTEN = “1” Enable Bit 2 ~ Bit 0 TBTCK2 ~ TBTCK0 Time Base Timer Clock Source SelectBit 4 ~ Bit 2 BRATE2 ~ BRATE1 Transmit Baud Rate Select TXE = “0” Disable TXE = “1” EnableEM78P312N 8-Bit Microcontroller8-Bit Microcontroller PRE = “0” Disable PRE = “1” Enable Bit 4 PRERR Parity error flagBit 0 RXE Enable receiving RXE = “0” Disable RXE = “1” Enable EM78P312NEDS = “0” Rising edge EDS = “1” Falling edge EM78P312N8-Bit Microcontroller Bit 5 ~ Bit 3 BRS0 ~ BRS2 SPI Clock Source SelectBank EM78P312N8-Bit Microcontroller Bit 2 ~ Bit 1 SPIM1 ~ SPIM0 SPI Transfer Mode SelectWDTE = “0” Disable WDTE = “1” Enable 5.3 Special Purpose RegistersPHE7x = “0” Enable P7x pull high PHE7x = “1” Disable P7x pull highIOC6 ~ IOC9 − I/O Port Control Register Bit 6 INT0EN INT0 enable control INT0EN = “0” General I/OEM78P312N 8-Bit Microcontroller Bit 2 PSR2 ~ Bit 0 PSR0 TCC prescaler bitsBit 5 ~ Bit 3 VOF2 ~ VOF0 Offset voltage bits EM78P312N8-Bit Microcontroller ADOSCR − AD Offset Control Register Address 0ChIMR2 − Interrupt Mask Register 2 Address 0Fh Bit 1 SPIE SPI Interrupt enable bitEM78P312N 8-Bit MicrocontrollerEM78P312N 5.4 CPU Operation Mode8-Bit Microcontroller Table 4. Wake-up Methods 5.5 AD ConverterEM78P312N 8-Bit MicrocontrollerA/D Sampling Time EM78P312N8-Bit Microcontroller ADC Data RegisterEM78P312N 5.6 Time Base Timer and Keytone GeneratorFig. 5-6 Tone Output Pin Configuration Fig. 5-7 Tone Output Pin Timing Chart8-Bit Microcontroller Fig. 5-8 TBT ConfigurationFig. 5-9 Time Base Timer Timing Chart EM78P312N8-Bit Microcontroller 5.7 UART Universal Asynchronous Receiver/TransmitterFig. 5-10 Function Block Diagram EM78P312N8-Bit Microcontroller 5.7.1 UART Mode5.7.2 Transmitting EM78P312N8-Bit Microcontroller 5.7.3 Receiving5.7.4 Baud Rate Generator EM78P312NEM78P312N 5.8 SPI Serial Peripheral InterfaceFig. 5-13 SPI Block Diagram This specification is subject to change without further noticeEM78P312N 5.8.2 Shift Direction and Sample Phase5.8.1 Serial Clock 5.8.3 Transfer Mode8-Bit Microcontroller b 8-bit Receive Mode EM78P312Nc 8-bit Transmit/Receive Mode SCK pin EM78P312N8-Bit Microcontroller d Multiple Device Connect /SSEM78P312N 5.9 Timer/CounterRegisters for Timer/Counter 2 Circuit Fig. 5-18 Configuration of Timer/CounterEM78P312N 5.9.1 Timer Mode5.9.2 Counter Mode 5.9.3 Window ModeEM78P312N 5.10 Timer/CounterRegisters for Timer/Counter 3 Circuit Fig. 5-21 Window Mode Timing ChartEM78P312N 5.10.1 Timer Mode5.10.2 Counter Mode 5.10.3 Capture ModeEM78P312N 5.11 Timer/Counter8-Bit Microcontroller EM78P312N 5.11.1 Timer Mode5.11.2 Counter Mode 5.11.3 PDO Mode8-Bit Microcontroller 5.12 TCC/WDT & Prescaler5.11.4 PWM Mode EM78P312NEM78P312N 5.14 Reset and Wake-up5.14.1 Reset 5.13 I/O Ports8-Bit Microcontroller 5.14.2 Wake-up from Sleep Mode5.14.3 Wake-up from Idle Mode EM78P312N8-Bit Microcontroller Reset TypeThis specification is subject to change without further notice EM78P312N8-Bit Microcontroller Register Bank Reset TypeThis specification is subject to change without further notice EM78P312N8-Bit Microcontroller Register Bank Reset TypeThis specification is subject to change without further notice EM78P312NEM78P312N Reset TypeReset Type This specification is subject to change without further noticeEM78P312N 5.14.4 The Status of RST, T, and P of the Status Register8-Bit Microcontroller General Purpose Registers EM78P312N 5.15 Interrupt8-Bit Microcontroller EM78P312N 5.16 Oscillator5.16.1 Oscillator Modes 5.16.2 Crystal Oscillator/Ceramic Resonators CrystalXTAL EM78P312N8-Bit Microcontroller OSCICrystal/Resonator-Parallel Mode Circuit 5.16.3 External RC Oscillator ModeEM78P312N 8-Bit MicrocontrollerEM78P312N 5.17 Code Option Register5.17.1 Code Option Register Word ENWDTB = “0” Enable ENWDTB = “1” DisableHLP = “0” Low power HLP = “1” High power 5.18 Power-on Considerations5.18.1 External Power-on Reset Circuit 5.17.2 Customer ID Register8-Bit Microcontroller 5.18.2 Residue-Voltage ProtectionRESET EM78P312NEM78P312N 5.19 Instruction Set8-Bit Microcontroller 8-Bit Microcontroller EM78P312NEM78P312N 6 Absolute Maximum Ratings6.1 Absolute Maximum Ratings 6.2 Recommended Operating Conditions8-Bit Microcontroller 7 Electrical Characteristics7.1 DC Electrical Characteristics EM78P312N8-Bit Microcontroller EM78P312NTa= 25 C, VDD= 3.0V ± 5%, VSS= 8-Bit Microcontroller EM78P312NTa=- 40C ~ 85 C, VDD=5V ± 5%, VSS=0V 7.2 AC Electrical CharacteristicEM78P312N 8-Bit MicrocontrollerEM78P312N 7.3 Timing DiagramRESET Timing CLK=0 This specification is subject to change without further noticeOTP MCU APPENDIX A Package TypesEM78P312N 8-Bit Microcontroller