STCN75_08 Datasheet, PDF(23/35 Page) STMicroelectronics – Digital temperature sensor and thermal watchdog

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STCN75_08 Datasheet, PDF (23/35 Pages) STMicroelectronics – Digital temperature sensor and thermal watchdog

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STCN75

Functional description

3.6

WRITE mode

In this mode the master transmitter transmits to the STCN75 slave receiver. Bus protocol is

shown in Figure 11. 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 11, and

Figure 12, and Figure 13 on page 24).

Figure 11. Typical pointer set followed by an immediate READ from the

configuration register

1 0 0 1 A2 A1 A0 R/W 0 0 0 0 0 0 D1 D0

Start

Master

Address Byte

ACK

STCN75

Pointer Byte

ACK

STCN75

Repeat

Start

Master

0 0 1 A2 A1 A0 R/W

D7 D6 D5 D4 D3 D2 D1 D0

Address Byte

ACK

STCN75

Data Byte

Stop

Cond.

No ACK by

by Master

STCN75

AI12230

Figure 12. Configuration register WRITE

1 0 0 1 A2 A1 A0 R/W

0 0 0 0 0 0 D1 D0

0 0 0 D4 D3 D2 D1 D0

Start

Master

Address Byte

ACK

STCN75

Pointer Byte

ACK

STCN75

Configuration Byte

Stop

Cond.

ACK

by Master

STCN75

AI12231

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