Manuals / IBM / Computer Equipment / Network Card

IBM EM78P312N manual Bit Microcontroller, d Multiple Device Connect /SS, SCK pin, SO pin, SI pin

Models: EM78P312N

1 68

Download 68 pages 28.33 Kb

Page 38

/SCK pin

EM78P312N

8-Bit Microcontroller

	shift start		shift start
SPIS
RBF	shift finish
WBE	shift finish
/SCK pin
SO pin	a0 a1 a2 a3 a4 a5 a6 a7		b0 b1 b2 b3 b4 b5 b6 b7
SI pin	c0 c1 c2 c3 c4 c5 c6 c7		d0 d1 d2 d3 d4 d5 d6 d7
SPIF
SPID	a	c	b	d
	write data	read data	write data	read data
	Fig. 5-16 Transmit/Receive Mode (8-bit, 1 word)

(d) Multiple Device Connect (/SS)

When selecting external clock for transfer clock source, the /SS function can be used. This pin (/SS) will be active when the /SS function is enabled, else the /SS pin is a general purpose I/O. Ignore the data on the SDI and SDO pins while /SS is high, since the SDO is no longer driven.

		SDO
		SDI
		SCK
		/SS
Master		P67
Master		P66
		P65
		P64
/SS	SDO	/SS	SDO	/SS	SDO	/SS	SDO
SCK	SDI	SCK	SDI	SCK	SDI	SCK	SDI
Slave Device 1		Slave Device 2		Slave Device 3		Slave Device 4

Fig. 5-17 The SPI Configuration Example of Single-Master and Multi-Slaves

34 •	Product Specification (V1.0) 10.03.2006

(This specification is subject to change without further notice)

Image 38

IBM EM78P312N manual Bit Microcontroller, d Multiple Device Connect /SS, SCK pin, SO pin, SI pin

Contents

8-BIT Microcontroller Green Product SpecificationEM78P312N ELAN MICROELECTRONICS CORPAll Rights Reserved ELAN MICROELECTRONICS CORPORATIONCopyright 2006 by ELAN Microelectronics Corporation General Description ContentsFeatures Pin AssignmentSpecification Revision History APPENDIXPin Assignment 2 Features1 General Description EM78P312NEM78P312N Pin DescriptionSymbol 8-Bit MicrocontrollerFig. 5-1 Functional Block Diagram 5.1 Functional Block Diagram5 Function Description This specification is subject to change without further noticeEM78P312N 5.2 Operating RegistersThis specification is subject to change without further notice 8-Bit MicrocontrollerR1 Time Clock /Counter EM78P312N8-Bit Microcontroller R0 Indirect Addressing Register R2 Program Counter & StackUser Memory Space EM78P312N8-Bit Microcontroller R3 Status RegisterBit 0 C Carry flag R4 RAM Select Register EM78P312N8-Bit Microcontroller R5 System Control RegisterEM78P312N RB Timer/Counter 4 Control RegisterBit 7 ~ Bit 6 TC4FF1 ~ TC4FF0 Timer/Counter 4 flip-flop control 8-Bit Microcontroller R6 Port 6 I/O Data RegisterEM78P312N Bit 4 ~ Bit 2 TC4CK2 ~ TC4CK 0 Timer/Counter 4 Clock Source SelectRC Timer 4 Data Buffer 8-Bit MicrocontrollerRFInterrupt Status Flag Register EM78P312N8-Bit Microcontroller RE Interrupt Status Flag Register TC3M = “1” Capture mode Bank 1 R6 TC3DA Timer 3 Data Buffer A Bank 1 R5 TC3CR Timer/Counter 3 Control RegisterBit 5 ~ Bit 4 TC3CK1 ~ TC3CK0 Timer/Counter 3 Clock Source Select Bank 1 R7 TC3DB Timer 3 Data Buffer BBank 1 RA TC2DL Timer 2 Data Buffer Low Byte Bit 2 ~ Bit 0 TC2CK2 ~ TC2CK0 Timer/Counter 2 Clock Source SelectBank 1 R9 TC2DH Timer 2 Data Buffer High Byte TC2M Timer/Counter 2 mode selectEM78P312N ADP = “0” Power on ADP = “1” Power downBit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable control 8-Bit MicrocontrollerBit 2 ~ Bit 0 TBTCK2 ~ TBTCK0 Time Base Timer Clock Source Select TEN = “0” Disable TEN = “1” EnableTBTEN = “0” Disable TBTEN = “1” Enable EM78P312N8-Bit Microcontroller TXE = “0” Disable TXE = “1” EnableEM78P312N Bit 4 ~ Bit 2 BRATE2 ~ BRATE1 Transmit Baud Rate SelectEM78P312N PRE = “0” Disable PRE = “1” Enable Bit 4 PRERR Parity error flagBit 0 RXE Enable receiving RXE = “0” Disable RXE = “1” Enable 8-Bit MicrocontrollerBit 5 ~ Bit 3 BRS0 ~ BRS2 SPI Clock Source Select EM78P312N8-Bit Microcontroller EDS = “0” Rising edge EDS = “1” Falling edgeBit 2 ~ Bit 1 SPIM1 ~ SPIM0 SPI Transfer Mode Select EM78P312N8-Bit Microcontroller BankPHE7x = “1” Disable P7x pull high 5.3 Special Purpose RegistersPHE7x = “0” Enable P7x pull high WDTE = “0” Disable WDTE = “1” Enable8-Bit Microcontroller Bit 2 PSR2 ~ Bit 0 PSR0 TCC prescaler bits Bit 6 INT0EN INT0 enable control INT0EN = “0” General I/OEM78P312N IOC6 ~ IOC9 − I/O Port Control RegisterADOSCR − AD Offset Control Register Address 0Ch EM78P312N8-Bit Microcontroller Bit 5 ~ Bit 3 VOF2 ~ VOF0 Offset voltage bits8-Bit Microcontroller Bit 1 SPIE SPI Interrupt enable bitEM78P312N IMR2 − Interrupt Mask Register 2 Address 0Fh8-Bit Microcontroller 5.4 CPU Operation ModeEM78P312N 8-Bit Microcontroller 5.5 AD ConverterEM78P312N Table 4. Wake-up MethodsADC Data Register EM78P312N8-Bit Microcontroller A/D Sampling TimeFig. 5-7 Tone Output Pin Timing Chart 5.6 Time Base Timer and Keytone GeneratorFig. 5-6 Tone Output Pin Configuration EM78P312NEM78P312N Fig. 5-8 TBT ConfigurationFig. 5-9 Time Base Timer Timing Chart 8-Bit MicrocontrollerEM78P312N 5.7 UART Universal Asynchronous Receiver/TransmitterFig. 5-10 Function Block Diagram 8-Bit MicrocontrollerEM78P312N 5.7.1 UART Mode5.7.2 Transmitting 8-Bit MicrocontrollerEM78P312N 5.7.3 Receiving5.7.4 Baud Rate Generator 8-Bit MicrocontrollerThis specification is subject to change without further notice 5.8 SPI Serial Peripheral InterfaceFig. 5-13 SPI Block Diagram EM78P312N5.8.3 Transfer Mode 5.8.2 Shift Direction and Sample Phase5.8.1 Serial Clock EM78P312Nc 8-bit Transmit/Receive Mode EM78P312N8-Bit Microcontroller b 8-bit Receive Mode d Multiple Device Connect /SS EM78P312N8-Bit Microcontroller SCK pinFig. 5-18 Configuration of Timer/Counter 5.9 Timer/CounterRegisters for Timer/Counter 2 Circuit EM78P312N5.9.3 Window Mode 5.9.1 Timer Mode5.9.2 Counter Mode EM78P312NFig. 5-21 Window Mode Timing Chart 5.10 Timer/CounterRegisters for Timer/Counter 3 Circuit EM78P312N5.10.3 Capture Mode 5.10.1 Timer Mode5.10.2 Counter Mode EM78P312N8-Bit Microcontroller 5.11 Timer/CounterEM78P312N 5.11.3 PDO Mode 5.11.1 Timer Mode5.11.2 Counter Mode EM78P312NEM78P312N 5.12 TCC/WDT & Prescaler5.11.4 PWM Mode 8-Bit Microcontroller5.13 I/O Ports 5.14 Reset and Wake-up5.14.1 Reset EM78P312NEM78P312N 5.14.2 Wake-up from Sleep Mode5.14.3 Wake-up from Idle Mode 8-Bit MicrocontrollerEM78P312N Reset TypeThis specification is subject to change without further notice 8-Bit MicrocontrollerEM78P312N Reset TypeThis specification is subject to change without further notice 8-Bit Microcontroller Register BankEM78P312N Reset TypeThis specification is subject to change without further notice 8-Bit Microcontroller Register BankThis specification is subject to change without further notice Reset TypeReset Type 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 5.16.2 Crystal Oscillator/Ceramic Resonators Crystal 5.16 Oscillator5.16.1 Oscillator Modes EM78P312NOSCI EM78P312N8-Bit Microcontroller XTAL8-Bit Microcontroller 5.16.3 External RC Oscillator ModeEM78P312N Crystal/Resonator-Parallel Mode CircuitENWDTB = “0” Enable ENWDTB = “1” Disable 5.17 Code Option Register5.17.1 Code Option Register Word EM78P312N5.17.2 Customer ID Register 5.18 Power-on Considerations5.18.1 External Power-on Reset Circuit HLP = “0” Low power HLP = “1” High powerEM78P312N 5.18.2 Residue-Voltage ProtectionRESET 8-Bit Microcontroller8-Bit Microcontroller 5.19 Instruction SetEM78P312N EM78P312N 8-Bit Microcontroller6.2 Recommended Operating Conditions 6 Absolute Maximum Ratings6.1 Absolute Maximum Ratings EM78P312NEM78P312N 7 Electrical Characteristics7.1 DC Electrical Characteristics 8-Bit MicrocontrollerTa= 25 C, VDD= 3.0V ± 5%, VSS= EM78P312N8-Bit Microcontroller EM78P312N 8-Bit Microcontroller8-Bit Microcontroller 7.2 AC Electrical CharacteristicEM78P312N Ta=- 40C ~ 85 C, VDD=5V ± 5%, VSS=0VThis specification is subject to change without further notice 7.3 Timing DiagramRESET Timing CLK=0 EM78P312N8-Bit Microcontroller APPENDIX A Package TypesEM78P312N OTP MCU