C8051F93X-C8051F92X 查看數據表（PDF） - Silicon Laboratories

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C8051F93X-C8051F92X

Single/Dual Battery, 0.9–3.6 V, 64/32 kB, SmaRTClock, 10-Bit ADC MCU

Silicon Laboratories 

C8051F93x-C8051F92x

Table 22.5. SMBus Status Decoding With Hardware ACK Generation Disabled (EHACK = 0)

Values Read

Values to

Write

Current SMbus State

Typical Response Options

0

0

0

A slave byte was transmitted;

NACK received.

No action required (expecting

STOP condition).

0 0 X 0001

0100

0

0

1

A slave byte was transmitted;

ACK received.

Load SMB0DAT with next data

byte to transmit.

0 0 X 0100

0

1

X

A Slave byte was transmitted;

error detected.

No action required (expecting

Master to end transfer).

0 0 X 0001

An illegal STOP or bus error

0101 0 X X was detected while a Slave Clear STO.

Transmission was in progress.

00X -

1

0

X

A slave address + R/W was

received; ACK requested.

If Write, Acknowledge received

address

0 0 1 0000

If Read, Load SMB0DAT with

data byte; ACK received address

0

0

1

0100

NACK received address.

000 -

0010

If Write, Acknowledge received

address

0 0 1 0000

1

1

X

Lost arbitration as master;

slave address + R/W received;

If Read, Load SMB0DAT with

data byte; ACK received address

0

0

1

0100

ACK requested.

NACK received address.

000 -

Reschedule failed transfer;

NACK received address.

1 0 0 1110

A STOP was detected while

0 0 X addressed as a Slave Trans- Clear STO.

0001

mitter or Slave Receiver.

00X -

1

1

X

Lost arbitration while attempt-

ing a STOP.

No action required (transfer

complete/aborted).

000 -

0000

1

0

X

A slave byte was received;

ACK requested.

Acknowledge received byte;

Read SMB0DAT.

NACK received byte.

0 0 1 0000

000 -

0010

0

1

X

Lost arbitration while attempt-

ing a repeated START.

Abort failed transfer.

Reschedule failed transfer.

00X -

1 0 X 1110

0001

0

1

X

Lost arbitration due to a

detected STOP.

Abort failed transfer.

Reschedule failed transfer.

00X -

1 0 X 1110

0000

1

1

X

Lost arbitration while transmit-

ting a data byte as master.

Abort failed transfer.

Reschedule failed transfer.

000 -

1 0 0 1110

Rev. 1.3

257

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