CHAPTER 12 SERIAL INTERFACE FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
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Condition for clearing (COI = 0)
•
When a start condition is detected
•
When a stop condition is detected
•
Cleared by LREL = 1
•
When IICE changes from 1 to 0
•
When RESET is input
COI
0
1
Addresses do not match.
Addresses match.
Detection of matching addresses
TRC
0
1
Detection of transmit/receive status
Condition for clearing (TRC = 0)
•
When a stop condition is detected
•
Cleared by LREL = 1
•
When IICE changes from 1 to 0
•
Cleared by WREL = 1
Note
•
When ALD changes from 0 to 1
•
When RESET is input
Master
•
When “1” is output to the first byte’s LSB (transfer
direction specification bit)
Slave
•
When a start condition is detected
When not used for communication
Condition for setting (TRC = 1)
Master
•
When a start condition is generated
Slave
•
When “1” is input by the first byte’s LSB (transfer
direction specification bit)
Condition for setting (COI = 1)
•
When the received address matches the local
address (SVA) (set at the rising edge of the
eighth clock).
Receive status (other than transmit status). The SDA line is set to high impedance.
Transmit status. The value in the SO latch is enabled for output to the SDA line (valid starting
at the falling edge of the first byte’s ninth clock).
Note
TRC is cleared and the SDA line becomes high impedance when bit 5 (WREL) of the IIC control register
(IICC) is set and the wait state is released at ninth clock when bit 3 (TRC) of the IIC status register (IICS)
= 1.
Remark
WREL: Bit 5 of IIC control register (IICC)
LREL:
Bit 6 of IIC control register (IICC)
IICE:
Bit 7 of IIC control register (IICC)
Содержание V850ES/SA2 UPD703201
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