EM73P968 datasheet(31/53 Pages) EMC

31 / 53 page

* This specification are subject to be changed without notice.

EM73P968

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

8.14.2001

Preliminary

SERIAL PERIPHERAL INTERFACE (SPI)

The Serial Peripheral Interface (SPI) circuitry consists of two control register P18, P24 , one data register (P12,

P13) ,one shift register. The MSTR select the source of the serial clock from the internal or the external clock.

at the same time, only transfer can occur or receive can occur. The SPI is available for the NORMAL

operation mode.

SPI Control Register :

P24(Bit)

SYMBOL

MSTR DORO

CLKS1

CLKS0

CLKS0~CLKS1: SPI transmission clock rate select

This is the clock rate selection bits, on master mode, we have four Kinds of rate can select.

Clock Rate

P24(1,0 BIT)

CLKS1

CLKS0

Fc/2^5

Fc/2^6

Fc/2^7

Fc/2^8

CTR0~1

SPI_F

MSTR

CLOCK

GENERATOR

DORD

8-BIT Shift register

Output latch

SDO

SDI

Internal

bus

SPI reg

SCK

DCOL

CLK0~1

SPIE

P12, P13

P15

DORD: Data transmission order

0: LSB first

the data in the 8-bit shift register is shifted in/out LSB first

1: MSB first

the data in the 8-bit shift register is shifted in/out LSB first

EM73P968 Datasheet(PDF) 31 Page - ELAN Microelectronics Corp

EM73P968 Datasheet(HTML) 31 Page - ELAN Microelectronics Corp

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