M16C6K7 Datasheet, PDF (196/285 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Rev.1.0
MULTI-MASTER I²C-BUS Interface
Mitsubishi microcomputers
M16C / 6K7 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
START Condition Generation Method
When ES0 bit of the I²C control register is “1” and the BB flag of I²C status register is “0”, writing “1” to the
MST, TRX, and BB bits and “0” to the PIN and low-order 4 bits of the I²C status register (address 032816,
033816) simultaneously enters the standby status to generate the start condition. The start condition is gen-
erated after writing slave address data to the I²C data shift register. After that, the bit counter becomes “0002”
and 1 byte SCL are output. The START condition generation timing is different in the standard clock mode
and the high-speed clock mode. Refer to Fig.GC-17 the START condition generation timing diagram, and
Table GC-9 the START condition generation timing table.
Interrupt disable
No
BB=0?
Yes
S1i=E016
Start condition standby status setting
S0i=Data
Start condition trigger occur.
✼ Data=Slave address data
Interrupt enable
Fig.GC-15 Start condition generation flow chart
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