C8051F045 查看數據表（PDF） - Silicon Laboratories

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C8051F045

Mixed Signal ISP Flash MCU Family

Silicon Laboratories 

C8051F040/1/2/3/4/5/6/7

Table 19.1. SMB0STA Status Codes and States

Mode

Status

Code

SMBus State

Typical Action

0x08

0x10

0x18

0x20

0x28

0x30

0x38

0x40

0x48

0x50

0x58

START condition transmitted.

Load SMB0DAT with Slave Address +

R/W. Clear STA.

Repeated START condition transmitted.

Load SMB0DAT with Slave Address +

R/W. Clear STA.

Slave Address + W transmitted. ACK

received.

Load SMB0DAT with data to be transmit-

ted.

Slave Address + W transmitted. NACK

received.

Acknowledge poll to retry. Set STO +

STA.

Data byte transmitted. ACK received.

1) Load SMB0DAT with next byte, OR

2) Set STO, OR

3) Clear STO then set STA for repeated

START.

Data byte transmitted. NACK received.

1) Retry transfer OR

2) Set STO.

Arbitration Lost.

Save current data.

Slave Address + R transmitted. ACK received.

If only receiving one byte, clear AA (send

NACK after received byte). Wait for

received data.

Slave Address + R transmitted. NACK

received.

Acknowledge poll to retry. Set STO +

STA.

Data byte received. ACK transmitted.

Read SMB0DAT. Wait for next byte. If

next byte is last byte, clear AA.

Data byte received. NACK transmitted.

Set STO.

252

Rev. 1.5

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