TMP89FS60 datasheet(282/410 Pages) TOSHIBA

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Page 268

18. Serial Bus Interface (SBI)

18.4 Functions

TMP89FS60

RA001

18.4.2 Selecting the slave address match detection and the GENERAL CALL detection

SBI0CR1<NOACK> enables and disables the slave address match detection and the GENERAL CALL

detection in the slave mode.

Clearing SBI0CR1<NOACK> to "0" enables the slave address match detection and the GENERAL CALL

detection.

Setting SBI0CR1<NOACK> to "1" disables the subsequent slave address match and GENERAL CALL

detections. The slave addresses and "GENERAL CALL" sent from the master are ignored. No acknowledge-

ment is returned and no interrupt request is generated.

In the master mode, SBI0CR1<NOACK> is ignored and has no influence on the operation.

Note:If SBI0CR1<NOACK> is cleared to "0" during data transfer in the slave mode, it remains at "1" and returns an

acknowledge signal of data transfer.

18.4.3 Selecting the number of clocks for data transfer and selecting the acknowledge-

ment or non-acknowledgment mode

1-word data transfer consists of data and an acknowledge signal. When the data transfer is finished, an inter-

rupt request is generated.

SBI0CR1<BC> is used to select the number of bits of data to be transmitted/received subsequently.

The acknowledgment mode is activated by setting SBI0CR1<ACK> to "1".

The master device generates the clocks for an acknowledge signal and outputs an acknowledge signal in the

receiver mode. The slave device counts the clocks for an acknowledge signal and outputs an acknowledge sig-

nal in the receiver mode.

The non-acknowledgment mode is activated by setting SBI0CR1<ACK> to "0".

The master device does not generate the clocks for an acknowledge signal. The slave device does not count

the clocks for an acknowledge signal.

18.4.3.1 Number of clocks for data transfer

The number of clocks for data transfer is set by using SBI0CR1<BC> and SBI0CR1<ACK>.

The acknowledgment mode is activated by setting SBI0CR1<ACK> to "1".

In the acknowledgment mode, the master device generates the clocks that correspond to the number of

data bits, generates the clocks for an acknowledge signal, and generates an interrupt request.

The slave device counts the clocks that correspond to the data bits, counts the clocks for an acknowl-

edge signal, and generates an interrupt request.

The non-acknowledgment mode is activated by setting SBI0CR1<ACK> to "0".

In the non-acknowledgment mode, the master device generates the clocks that correspond to the number

of data bits, and generates an interrupt request.

The slave device counts the clocks that correspond to the data bits, and generates an interrupt request.

TMP89FS60 Datasheet(PDF) 282 Page - Toshiba Semiconductor