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IBM EM78P312N manual Bit Microcontroller, EVEN = “0” Odd parity EVEN = “1” Even parity

Models: EM78P312N

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EVEN = “0” : Odd parity

EM78P312N

8-Bit Microcontroller

Bit 6 ( EVEN ) : Select parity check

EVEN = “0” : Odd parity

EVEN = “1” : Even parity

Bit 5 ( PRE ) : Enable parity addition

PRE = “0” : Disable

PRE = “1” : Enable

Bit 4 ( PRERR ) : Parity error flag.

Set to 1 when parity error occurred, and cleared to 0 by software.

Bit 3 ( OVERR ) : Overrun error flag.

Set to 1 when overrun error occurred, and cleared to 0 by software.

Bit 2 ( FMERR ) : Framing error flag.

Set to 1 when framing error occurred, and cleared to 0 by software.

Bit 1 ( URBF ) : UART read buffer full flag.

Set to 1 when one character is received. Reset to 0 automatically when read from the URS register. URBF will be cleared by hardware when receiving is enabled. URBF bit is read-only. Therefore, reading the URS register is necessary to avoid an overrun error.

Bit 0 ( RXE ) : Enable receiving

RXE = “0” : Disable

RXE = “1” : Enable

Bank 2 R8 URRD (UART Receive Data Buffer)

Bit 7		Bit 6		Bit 5		Bit 4	Bit 3	Bit 2	Bit 1	Bit 0

URRD7		URRD6		URRD5		URRD4	URRD3	URRD2	URRD1	URRD0

Bit 7 ~ Bit 0 ( URRD7 ~ URRD0 ) : UART receive data buffer. Read only.

Bank 2 R9 URTD (UART Transmit Data Buffer)

	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0

URTD 7 URTD 6 URTD 5 URTD 4 URTD 3

URTD 2 URTD 1

URTD0

Bit 7 ~ Bit 0 ( URTD 7 ~ URTD 0) : UART transmit data buffer. Write only.

Bank 3 R5 SPIC1 (SPI Control Register 1)

Bit 7		Bit 6		Bit 5		Bit 4
SMP		DCOL		BRS2		BRS1

Bit 3

BRS0

	Bit 2	Bit 1		Bit 0
	EDS	DORD		WBE

Bit 7 ( SMP ) : SPI data input sample phase.

SMP = “0” : Input data sampled at middle of data output time

SMP = “1” : Input data sampled at the end of data output time

16 •	Product Specification (V1.0) 10.03.2006

(This specification is subject to change without further notice)

Image 20

IBM EM78P312N Bit Microcontroller, EVEN = “0” Odd parity EVEN = “1” Even parity, Bank 2 R8 URRD UART Receive Data Buffer

Contents

Green Product Specification EM78P312N8-BIT Microcontroller ELAN MICROELECTRONICS CORPAll Rights Reserved ELAN MICROELECTRONICS CORPORATIONCopyright 2006 by ELAN Microelectronics Corporation Contents FeaturesGeneral Description Pin AssignmentSpecification Revision History APPENDIX2 Features 1 General DescriptionPin Assignment EM78P312NPin Description SymbolEM78P312N 8-Bit Microcontroller5.1 Functional Block Diagram 5 Function DescriptionFig. 5-1 Functional Block Diagram This specification is subject to change without further notice5.2 Operating Registers This specification is subject to change without further noticeEM78P312N 8-Bit MicrocontrollerEM78P312N 8-Bit Microcontroller R0 Indirect Addressing RegisterR1 Time Clock /Counter R2 Program Counter & StackEM78P312N 8-Bit MicrocontrollerUser Memory Space R3 Status RegisterEM78P312N 8-Bit MicrocontrollerBit 0 C Carry flag R4 RAM Select Register R5 System Control RegisterRB Timer/Counter 4 Control Register Bit 7 ~ Bit 6 TC4FF1 ~ TC4FF0 Timer/Counter 4 flip-flop controlEM78P312N 8-Bit Microcontroller R6 Port 6 I/O Data RegisterBit 4 ~ Bit 2 TC4CK2 ~ TC4CK 0 Timer/Counter 4 Clock Source Select RC Timer 4 Data BufferEM78P312N 8-Bit MicrocontrollerRFInterrupt Status Flag Register EM78P312N8-Bit Microcontroller RE Interrupt Status Flag Register Bank 1 R5 TC3CR Timer/Counter 3 Control Register Bit 5 ~ Bit 4 TC3CK1 ~ TC3CK0 Timer/Counter 3 Clock Source SelectTC3M = “1” Capture mode Bank 1 R6 TC3DA Timer 3 Data Buffer A Bank 1 R7 TC3DB Timer 3 Data Buffer BBit 2 ~ Bit 0 TC2CK2 ~ TC2CK0 Timer/Counter 2 Clock Source Select Bank 1 R9 TC2DH Timer 2 Data Buffer High ByteBank 1 RA TC2DL Timer 2 Data Buffer Low Byte TC2M Timer/Counter 2 mode selectADP = “0” Power on ADP = “1” Power down Bit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable controlEM78P312N 8-Bit MicrocontrollerTEN = “0” Disable TEN = “1” Enable TBTEN = “0” Disable TBTEN = “1” EnableBit 2 ~ Bit 0 TBTCK2 ~ TBTCK0 Time Base Timer Clock Source Select EM78P312NTXE = “0” Disable TXE = “1” Enable EM78P312N8-Bit Microcontroller Bit 4 ~ Bit 2 BRATE2 ~ BRATE1 Transmit Baud Rate SelectPRE = “0” Disable PRE = “1” Enable Bit 4 PRERR Parity error flag Bit 0 RXE Enable receiving RXE = “0” Disable RXE = “1” EnableEM78P312N 8-Bit MicrocontrollerEM78P312N 8-Bit MicrocontrollerBit 5 ~ Bit 3 BRS0 ~ BRS2 SPI Clock Source Select EDS = “0” Rising edge EDS = “1” Falling edgeEM78P312N 8-Bit MicrocontrollerBit 2 ~ Bit 1 SPIM1 ~ SPIM0 SPI Transfer Mode Select Bank5.3 Special Purpose Registers PHE7x = “0” Enable P7x pull highPHE7x = “1” Disable P7x pull high WDTE = “0” Disable WDTE = “1” EnableBit 6 INT0EN INT0 enable control INT0EN = “0” General I/O EM78P312N8-Bit Microcontroller Bit 2 PSR2 ~ Bit 0 PSR0 TCC prescaler bits IOC6 ~ IOC9 − I/O Port Control RegisterEM78P312N 8-Bit MicrocontrollerADOSCR − AD Offset Control Register Address 0Ch Bit 5 ~ Bit 3 VOF2 ~ VOF0 Offset voltage bitsBit 1 SPIE SPI Interrupt enable bit EM78P312N8-Bit Microcontroller IMR2 − Interrupt Mask Register 2 Address 0Fh8-Bit Microcontroller 5.4 CPU Operation ModeEM78P312N 5.5 AD Converter EM78P312N8-Bit Microcontroller Table 4. Wake-up MethodsEM78P312N 8-Bit MicrocontrollerADC Data Register A/D Sampling Time5.6 Time Base Timer and Keytone Generator Fig. 5-6 Tone Output Pin ConfigurationFig. 5-7 Tone Output Pin Timing Chart EM78P312NFig. 5-8 TBT Configuration Fig. 5-9 Time Base Timer Timing ChartEM78P312N 8-Bit Microcontroller5.7 UART Universal Asynchronous Receiver/Transmitter Fig. 5-10 Function Block DiagramEM78P312N 8-Bit Microcontroller5.7.1 UART Mode 5.7.2 TransmittingEM78P312N 8-Bit Microcontroller5.7.3 Receiving 5.7.4 Baud Rate GeneratorEM78P312N 8-Bit Microcontroller5.8 SPI Serial Peripheral Interface Fig. 5-13 SPI Block DiagramThis specification is subject to change without further notice EM78P312N5.8.2 Shift Direction and Sample Phase 5.8.1 Serial Clock5.8.3 Transfer Mode EM78P312Nc 8-bit Transmit/Receive Mode EM78P312N8-Bit Microcontroller b 8-bit Receive Mode EM78P312N 8-Bit Microcontrollerd Multiple Device Connect /SS SCK pin5.9 Timer/Counter Registers for Timer/Counter 2 CircuitFig. 5-18 Configuration of Timer/Counter EM78P312N5.9.1 Timer Mode 5.9.2 Counter Mode5.9.3 Window Mode EM78P312N5.10 Timer/Counter Registers for Timer/Counter 3 CircuitFig. 5-21 Window Mode Timing Chart EM78P312N5.10.1 Timer Mode 5.10.2 Counter Mode5.10.3 Capture Mode EM78P312N8-Bit Microcontroller 5.11 Timer/CounterEM78P312N 5.11.1 Timer Mode 5.11.2 Counter Mode5.11.3 PDO Mode EM78P312N5.12 TCC/WDT & Prescaler 5.11.4 PWM ModeEM78P312N 8-Bit Microcontroller5.14 Reset and Wake-up 5.14.1 Reset5.13 I/O Ports EM78P312N5.14.2 Wake-up from Sleep Mode 5.14.3 Wake-up from Idle ModeEM78P312N 8-Bit MicrocontrollerReset Type This specification is subject to change without further noticeEM78P312N 8-Bit MicrocontrollerReset Type This specification is subject to change without further noticeEM78P312N 8-Bit Microcontroller Register BankReset Type This specification is subject to change without further noticeEM78P312N 8-Bit Microcontroller Register BankReset Type Reset TypeThis specification is subject to change without further notice EM78P312N8-Bit Microcontroller General Purpose Registers 5.14.4 The Status of RST, T, and P of the Status RegisterEM78P312N 8-Bit Microcontroller 5.15 InterruptEM78P312N 5.16 Oscillator 5.16.1 Oscillator Modes5.16.2 Crystal Oscillator/Ceramic Resonators Crystal EM78P312NEM78P312N 8-Bit MicrocontrollerOSCI XTAL5.16.3 External RC Oscillator Mode EM78P312N8-Bit Microcontroller Crystal/Resonator-Parallel Mode Circuit5.17 Code Option Register 5.17.1 Code Option Register WordENWDTB = “0” Enable ENWDTB = “1” Disable EM78P312N5.18 Power-on Considerations 5.18.1 External Power-on Reset Circuit5.17.2 Customer ID Register HLP = “0” Low power HLP = “1” High power5.18.2 Residue-Voltage Protection RESETEM78P312N 8-Bit Microcontroller8-Bit Microcontroller 5.19 Instruction SetEM78P312N EM78P312N 8-Bit Microcontroller6 Absolute Maximum Ratings 6.1 Absolute Maximum Ratings6.2 Recommended Operating Conditions EM78P312N7 Electrical Characteristics 7.1 DC Electrical CharacteristicsEM78P312N 8-Bit MicrocontrollerTa= 25 C, VDD= 3.0V ± 5%, VSS= EM78P312N8-Bit Microcontroller EM78P312N 8-Bit Microcontroller7.2 AC Electrical Characteristic EM78P312N8-Bit Microcontroller Ta=- 40C ~ 85 C, VDD=5V ± 5%, VSS=0V7.3 Timing Diagram RESET Timing CLK=0This specification is subject to change without further notice EM78P312NAPPENDIX A Package Types EM78P312N8-Bit Microcontroller OTP MCU