ATR2731 Datasheet, PDF (14/26 Pages) ATMEL Corporation – DAB One-chip Front End

8.3 Simple Two-wire Bus Timing
The values of the periods shown are specified in the table “Electrical Characteristics” on page
16. Please note, that according to the two-wire bus specification, the MSB of a byte is transmit-
ted first, the LSB last.
Figure 8-1. Two-wire Bus Timing
Stop Start
Start
Stop
SDA
t_buf
t_r
t_r
t_hdstat
SCL
t_hdsta t_low t_hddat
t_high
t_sudat
t_susta
t_sustp
Figure 8-2. Typical Pulse Diagram
START
ADDRESS BYTE
ACK
A BYTE 1
ACK
A BYTE 2
ACK
SDA
SCL
SDA
SCL
A BYTE 3
ACK
C BYTE 1
ACK
C BYTE 2
ACK STOP
14 ATR2731
4904A–DAB–03/06