STDS75 Datasheet, PDF (25/37 Pages) STMicroelectronics – Digital temperature sensor and thermal watchdog

STDS75
Functional description
3.6
WRITE mode
In this mode the master transmitter transmits to the STDS75 slave receiver. Bus protocol is
shown in Figure 12. Following the START condition and slave address, a logic '0' (R/W = 0)
is placed on the bus and indicates to the addressed device that word address will follow and
is to be written to the on-chip address pointer.
These modes are shown in the WRITE mode typical timing diagrams (see Figure 12, and
Figure 13, and Figure 14 on page 26).
Figure 12. Typical pointer set followed by an Immediate READ from the
configuration register
1
91
9
1 0 0 1 A2 A1 A0 W
0 0 0 0 0 0 D1 D0
Start
by
Master
Address Byte
ACK
by
STDS75
Pointer Byte
ACK
by
STDS75
1
91
9
1
Repeat
Start
by
Master
0 0 1 A2 A1 A0 ^R/W
D7 D6 D5 D4 D3 D2 D1 D0
Address Byte
ACK
by
STDS75
Data Byte
Stop
Cond.
No ACK by
by Master
STDS75
Figure 13. Configuration register WRITE
1
91
91
AI12279b
9
1 0 0 1 A2 A1 A0 W
0 0 0 0 0 0 D1 D0
0 0 0 D4 D3 D2 D1 D0
Start
by
Master
Address Byte
ACK
by
STDS75
Pointer Byte
ACK
by
STDS75
Configuration Byte
Stop
Cond.
ACK
by
by _Master
STDS75
AI12280b
25/37