Renesas HD151TS207SS - Manual (Page 25)

HD151TS207SS
Rev.1.00, Apr.25.2003, page 25 of 38
Renesas clock generator I
2
C Serial Interface Operation
1. Write mode
1.1 Controller (host) sends a start bit.
1.2 Controller (host) sends the write address D2 (h).
1.3 Renesas clock generator will acknowledge (Renesas clock gen. sends “Low”).
1.4 Controller (host) sends a begin byte M.
1.5 Renesas clock generator will acknowledge (Renesas clock gen. sends “Low”).
1.6 Controller (host) sends a byte count N.
1.7 Renesas clock generator will acknowledge (Renesas clock gen. sends “Low”).
1.8 Controller (host) sends data from byte M to byte M+N–1.
1.9 Renesas clock generator will acknowledge each byte one at a time.
1.10 Controller (host) sends a stop bit.
Start bit
1 bit 1 bit 1 bit 1 bit 1 bit 7 bits 8 bits 8 bits 8 bits
Byte M
Slave
address
Begin Byte = M Byte Count = N
R/W
D2(h)
Ack
1 bit
Ack
1 bit
Ack
Ack Ack
Byte M+1
8 bits 1 bit 1 bit
Stop bit
8 bits
Byte M+N–1 Ack