tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 282

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

18.4 Functions
18. Serial Bus Interface (SBI)
RA001
18.4.2 Selecting the slave address match detection and the GENERAL CALL detection
18.4.3 Selecting the number of clocks for data transfer and selecting the acknowledge-
18.4.3.1 Number of clocks for data transfer
detection in the slave mode.
detection.
detections. The slave addresses and "GENERAL CALL" sent from the master are ignored. No acknowledge-
ment is returned and no interrupt request is generated.
ment or non-acknowledgment mode
rupt request is generated.
receiver mode. The slave device counts the clocks for an acknowledge signal and outputs an acknowledge sig-
nal in the receiver mode.
the clocks for an acknowledge signal.
SBI0CR1<NOACK> enables and disables the slave address match detection and the GENERAL CALL
Clearing SBI0CR1<NOACK> to "0" enables the slave address match detection and the GENERAL CALL
Setting SBI0CR1<NOACK> to "1" disables the subsequent slave address match and GENERAL CALL
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
1-word data transfer consists of data and an acknowledge signal. When the data transfer is finished, an inter-
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
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
data bits, generates the clocks for an acknowledge signal, and generates an interrupt request.
edge signal, and generates an interrupt request.
of data bits, and generates an interrupt request.
acknowledge signal of 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
The slave device counts the clocks that correspond to the data bits, counts the clocks for an acknowl-
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
The slave device counts the clocks that correspond to the data bits, and generates an interrupt request.
Page 268
TMP89FM42