tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 95

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

SCL (Bus)
SCL pin
SDA (pin)
LRB
BB
PIN
(5) Restart
a slave device during transferring data. The following explains how to restart when the
TMP88CU74 is in the master mode.
SDA pin retains the high level and the SCL pin is released. Since a stop condition is not
generated on a bus, a bus is assumed to be in a busy state from other devices. Check
the BB until it becomes “0” to check that the SCL pin of theTMP88CU74 is released.
Check the LRB until it becomes “1” to check that the SCL line of a bus is not pulled
down to the low level by other devices. After confirming that a bus stays in a free state,
generate a start condition with procedure (2).
software from the time of restarting to confirm that the bus is free until the time to
generate the start condition.
Restart is used to change the direction of data transfer between a master device and
Specify “0” to the MST, TRX, and BB and “1” to the PIN and release the bus. The
In order to meet setup time when restarting, take at least 4.7 [µs] of waiting time by
Figure 2.10.16 Timing Diagram when Restarting theTMP88CU74
“0” → MST
“0” → TRX
“0” → BB
“1” → PIN
88CU74-95
“1” → MST
“1” → TRX
“1” → BB
“1” → PIN
4.7 [µs] (Min)
Start condition
TMP88CU74
2007-10-19
2003-02-17