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
369
Figure 8-46 Slave Reception Interrupt (5)-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 INTE = "1"
: Interrupt because of CNDE = "1"
(1) An interrupt generated because the reception FIFO gets full
- Read all data from the reception FIFO, and write INT = "0"
Figure 8-47 Slave Reception Interrupt (6)-when FIFO is Enabled
(SSR:DMA="0", IBCR:WSEL="0", IBSR:RSA="1")
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 matching the reserved address ("0000XXXX" or "1111XXXX")
- Read the reception data, and write ACKE = "1" and INT = "0"
(2) An interrupt generated by 1 byte reception + acknowledgment output
- Write INT = "0"
(3) An interrupt generated by 1 byte reception + acknowledgment output
- Interrupt by writing INT = "0"
MB91520 Series
MN705-00010-1v0-E
1682