tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 93

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

INTSBI
interrupt request
SCL pin
SDA pin
PIN
Figure 2.10.14 Termination of Data Transfer in Master Receiver Mode
b.
before reading data which is 1 word before the last data to be received. The last
data does not generate a clock pulse for the acknowledge signal. After the data is
transmitted and an interrupt request has occurred, set the BC to “001” and read
the data. The TMP88CU74 generates a clock pulse for a 1-bit data transfer. Since
the master device is a receiver, the SDA line of the bus keeps the high level. The
transmitter receives the high-level signal as an ACK signal. The receiver
indicates to the transmitter that data transfer is complete.
TMP88CU74 generates a stop condition and terminates data transfer.
When the MST is “0” (Slave mode)
slave mode after losing arbitration.
receives a slave address or a GENERAL CALL from the master device, or when a
GENERAL CALL is received and data transfer is complete after matching a
received slave address. In the master mode, the TMP88CU74 operates in a slave
mode if it is losing arbitration. An INTSBI interrupt request occurs when word
data transfer terminates after losing arbitration. When an INTSBI interrupt
request occurs, the PIN (bit 4 in the SBICR2) is reset, and the SCL pin is pulled
down to the low level. Either reading/writing from/to the SBIDBR or setting the
PIN to “1” releases the SCL pin after taking t
in the SBISR), and the AD0 (bit 1 in the SBISR) and implements processes
according to conditions listed in the next table.
In order to terminate transmitting data to a transmitter, clear the ACK to “0”
After 1-bit data is received and an interrupt request has occurred, the
In the slave mode, the TMP88CU74 operates either in normal slave mode or in
In the slave mode, an INTSBI interrupt request occurs when the TMP88CU74
Check the AL (bit 3 in the SBISR), the TRX (bit 6 in the SBISR), the AAS (bit 2
D7
“0” à ACK,
Read SBIDBR
1
D6
2
D5
3
88CU74-93
D4
4
D3
5
D2
6
D1
LOW
7
time.
D0
8
1
“001” à BC,
Read SBIDBR
Acknowledge signal
sent to a transmitter
TMP88CU74
2007-10-19
2003-02-17