tmp88cs34ng TOSHIBA Semiconductor CORPORATION, tmp88cs34ng Datasheet - Page 98

• Manufacturer Part Number: tmp88cs34ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

INTSBI interrupt
INTSBI interrupt
(3) 1-word data transfer
a.
SDA pin
SCL pin
SDA pin
SCL pin
request
completed, and determine whether the mode is a master or slave.
When the MST is “1” (Master mode)
1.
2.
PIN
PIN
Check the MST by the INTSBI interrupt process after an 1-word data transfer is
Check the TRX and determine whether the mode is a transmitter or receiver.
When the TRX is “1” (Transmitter mode)
process to generate a stop condition (described later) and terminate data transfer.
data is other than 8 bits, set the BC, set the ACK to “1”, and write the transmitted data
to the SBIDBR. After writing the data, the PIN becomes “1”, a serial clock pulse is
generated for transferring a next 1-word of data from the SCL pin, and then the 1-word
data is transmitted. After the data is transmitted, and an INTSBI interrupt request
occurs. The PIN become “0” and the SCL pin is set to low level. If the data to be
transferred is more than one word in length, repeat the procedure from the LRB test
above.
When the TRX is “0” (Receiver mode)
ACK to “1” and read the received data from the SBIDBR (reading data is undefined
immediately after a slave address is sent). After the data is read, the PIN becomes “1”.
A serial bus interface circuit outputs a serial clock pulse to the SCL to transfer next
1-word of data and sets the SDA pin to “0” at the acknowledge signal timing.
interface circuit outputs a clock pulse for 1-word of data transfer and the acknowledge
signal each time that received data is read from the SBIDBR.
Test the LRB. When the LRB is “1”, a receiver does not request data. Implement the
When the LRB is “0”, the receiver requests next data. When the next transmitted
When the next transmitted data is other than of 8 bits, set the BC again. Set the
An INTSBI interrupt request occurs and the PIN becomes “0”. Then a serial bus
Figure 2.9.14 Example of when BC = “000”, ACK = “1”
Figure 2.9.15 Example of when BC = “000”, ACK = “1”
D7
D7
Read to SBIDBR
Write to SBIDBR
1
1
D6
D6
2
2
D5
D5
3
3
88CS34-98
D4
D4
4
4
D3
D3
5
5
D2
D2
6
6
D1
D1
7
7
D0
D0
8
8
9
9
TMP88CS34/CP34
Acknowledge
signal to a
transmitter
Acknowledge
signal from a
receiver
New D7
2007-09-12