EM78P451SWM datasheet(23/54 Pages) EMC

Teilenummer	EM78P451SWM

Bauteilbeschribung	8-Bit Microcontroller with OTP ROM

PDF	54 Pages

Scroll/Zoom	100%

Hersteller	EMC [ELAN Microelectronics Corp]

Direct Link	http://www.emc.com.tw

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23 / 54 page

EM78P451S

8-Bit Microcontroller with OTP ROM

Product Specification (V1.0) 06.01.2004

• 19

(This specification is subject to change without further notice)

4.5.2 SPI Function Description

R ead

W rite

SP IR

re g

SPIS

re g

sh ift righ t

bit 0

bit 7

P res ca le r

4, 8, 16 , 3 2 , 64

SPIW

re g

P 92/S D I

P 93/S D O

P 9 5 / /S S

P 94/S C K

/ SS

Ed g e

Se le c t

Edg e

Sele ct

SPIC bit6

Ts c o

TM R 1 /2

S B R2 ~ S BR0

C lo ck S e lect

No is e

Filter

SPIC re g

S BR0 ~ S BR 2

RBF

RBF I

B u ffe r F u ll D e te c to r

S e t to 1

Fig. 11 SPI Block Diagram

2 1 0

SPIC

7~0

SPIWB

SPI Shift Buffer

DATA BUS

FOSC

1 0

T1CON

6 4

SPIC

1 0

SPIS

SPIC

SPI

INTC

7~0

SPIRB

SDO

SDI

Shift Clock

Fig. 12 The Function Block Diagram of SPI Transmission

The following describes the function of each block and explains how to carry out the

SPI communication with the signals depicted in Fig.11 and Fig.12:

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