Motorola MVME5100 用户手册

3-26

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System Memory Controller (SMC)

READ I

2

C STATUS REG

CMPLT=1?

N

Y

LOAD “WORD ADDR x” TO

I

2

C TRANSMITTER DATA REG

READ I

2

C STATUS REG

CMPLT=ACKIN=1?

N

Y

LOAD “$09” (START CONDITION) TO

I

2

C CONTROL REG

LOAD “DEVICE ADDR+WR BIT” TO

C TRANSMITTER DATA REG

READ I

2

C STATUS REG

CMPLT=ACKIN=1?

N

Y

LOAD “$05” (STOP CONDITION) TO

I

2

C CONTROL REG

LOAD “DUMMY DATA” TO

I

2

C TRANSMITTER DATA REG

READ I

2

C STATUS REG

CMPLT=1?

N

Y

END

LOAD “$09” (REPEATED START

CONDITION) TO I

2

C CONTROL REG

LOAD “DEVICE ADDR+RD BIT” TO

I

2

C TRANSMITTER DATA REG

READ I

2

C STATUS REG

CMPLT=ACKIN=1?

N

Y

LOAD “DUMMY DATA” TO

I

2

C TRANSMITTER DATA REG

READ I

2

C STATUS REG

CMPLT=DATIN=1?

N

Y

BEGIN

READ I

2

C RECEIVER DATA REG

START

M
S
B

SDA

DEVICE ADDR

W
R

A
C
K

WORD ADDR x

A
C
K

START

M
S
B

DEVICE ADDR

R
D

A
C
K

DATA x

N
O
A
C
K

STOP

: