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EM78P451 Datasheet(PDF) 3 Page - ELAN Microelectronics Corp |
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EM78P451 Datasheet(HTML) 3 Page - ELAN Microelectronics Corp |
3 / 54 page Contents Product Specification (V1.1) 06.30.2003 • iii Contents 1 GENERAL DESCRIPTION ................................................................................................... 1 2 FEATURES ........................................................................................................................... 1 3 PIN ASSIGNMENT ............................................................................................................... 2 4 FUNCTION DESCRIPTION.................................................................................................. 4 4.1 Operational Registers ..................................................................................................4 4.1.1 R0 (Indirect Address Register) ......................................................................................4 4.1.2 R1 (TCC) .......................................................................................................................4 4.1.3 R2 (Program Counter) & Stack......................................................................................4 4.1.4 R3 (Status Register) ......................................................................................................6 4.1.5 R4 (RAM Select Register) .............................................................................................6 4.1.6 R5~R8 (Port 5 ~ Port8)..................................................................................................6 4.1.7 R9 (Port9) ......................................................................................................................7 4.1.8 RA (SPIRB: SPI Read Buffer)........................................................................................8 4.1.9 RB (SPIWB: SPI Write Buffer).......................................................................................8 4.1.10 RC (SPIS: SPI Status Segister).....................................................................................8 4.1.11 RD (SPIC: SPI Control Register)...................................................................................9 4.1.12 RE (TMR1: Timer1 register) ..........................................................................................9 4.1.13 RF (PWP: Pulse width preset register)........................................................................10 4.1.14 R20~R3E (General Purpose Register)........................................................................10 4.1.15 R3F (Interrupt Status Register) ...................................................................................10 4.2 Special Purpose Registers .........................................................................................10 4.2.1 A (Accumulator) ...........................................................................................................10 4.2.2 CONT (Control Register) .............................................................................................10 4.2.3 IOC5 ~ IOC9 (I/O Port Control Register)..................................................................... 11 4.2.4 IOCC (T1CON: Timer1 Control Register).................................................................... 11 4.2.5 IOCD (Pull-high Control Register) ...............................................................................12 4.2.6 IOCE (WDT Control Register) .....................................................................................12 4.2.7 IOCF (Interrupt Mask Register) ...................................................................................13 4.3 TCC/WDT Presacler ..................................................................................................14 4.4 I/O Ports .....................................................................................................................15 4.5 SERIAL PERIPHERAL INTERFACE MODE..............................................................17 4.5.1 Overview & Features ...................................................................................................17 4.5.2 SPI Function Description.............................................................................................19 4.5.3 SPI Signal & Pin Description .......................................................................................20 4.5.4 Programmed the Related Registers ............................................................................22 4.5.5 SPI Mode Timing .........................................................................................................24 4.5.6 Software Application of SPI .........................................................................................25 4.6 Timer 1 .......................................................................................................................29 4.6.1 Overview......................................................................................................................29 4.6.2 Function Description....................................................................................................30 |
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