Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
8. Operation of I2C
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
368
Figure 8-43 Slave Reception Interrupt (2)-when FIFO is Disabled
(SSR:DMA="0", IBCR:WSEL="1", IBSR:RSA="0")
S Slave Address W ACK Data ACK Data ACK Data ACK P or Sr
△ △ △ △ ▲
① ② ② ③
S: Start condition
W: Data direction bit (Write direction)
P: Stop condition
Sr: Repeated start condition
: Interrupt because of INTE = "1"
: Interrupt because of CNDE = "1"
(1) An interrupt generated by ACK output due to the match with the slave address
- Write ACKE="1", INT = "0"
(2) An interrupt generated by 1 byte reception
- Read the reception data from the reception buffer, and write INT = "0"
(3) An interrupt generated by 1 byte reception
- Read the reception data from the reception buffer, and write INT = "0"
Figure 8-44 Slave Reception Interrupt (3)-when FIFO is Disabled
(SSR:DMA="0", IBCR:WSEL="1", IBSR:RSA="0")
S Slave Address W ACK Data ACK Data ACK Data NACK P or Sr
△ △ △ △ △▲
① ② ② ② ③
S: Start condition
W: Data direction bit (Write direction)
P: Stop condition
Sr: Repeated start condition
: Interrupt because of INTE = "1"
: Interrupt because of CNDE = "1"
(1) An interrupt generated by ACK output due to the match with the slave address
- Write ACKE="1", INT = "0"
(2) An interrupt generated by 1 byte reception
- Read the reception data from the reception buffer, and write INT = "0"
(3) An interrupt generated by NACK response
- Write INT = "0"
Figure 8-45 Slave Reception Interrupt (4)-when FIFO is Enabled
(SSR:DMA="0" IBSR:RSA="0")
S Slave Address W ACK Data ACK Data ACK Data ACK P or Sr
▲
①
S: Start condition
W: Data direction bit (Write direction)
P: Stop condition
Sr: Repeated start condition
: Interrupt because of CNDE = "1"
(1) An interrupt generated by the detection of a stop condition or a repeated start condition
- Read all data from the reception FIFO
MB91520 Series
MN705-00010-1v0-E
1681