CAT6095 datasheet(8/18 Pages) ONSEMI

Part #	CAT6095

Description	Digital Output Temperature Sensor

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Manufacturer	ONSEMI [ON Semiconductor]

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CAT6095

Doc. No. MD-1124 Rev. D

8

Characteristics subject to change without notice

WRITE OPERATIONS

Temperature Sensor Register Write

To write data to a TS register the Master creates a

START condition on the bus, and then sends out the

appropriate Slave address (with the R/W

¯¯ bit set to

‘0’), followed by an address byte and two data bytes.

The matching Slave will acknowledge the Slave

address, TS register address and the TS register

data (Figure 5). The Master then ends the session

by creating a STOP condition on the bus. The STOP

completes the TS register update. Note that all

registers in the TS are ‘volatile’ meaning any data

contained in them is lost when power is removed

from the chip.

READ OPERATIONS

Immediate Read

Upon power-up, the Temperature Sensor (TS)

address counter is initialized to 00h. The TS address

counter will thus point to the Capability Register.

This

address

counter

may

be

updated

by

subsequent operations.

A CAT6095 presented with a Slave address

containing a ‘1’ in the R/W

¯¯ position will acknowledge

the Slave address and will then start transmitting

data being pointed at by the current TS register

address counter. The Master stops this transmission

by responding with NoACK, followed by a STOP

(Figure 6).

Selective Read

The Read operation can be started at an address

different from the one stored in the address counter,

by preceeding the Immediate Read sequence with a

‘data less’ Write operation. The Master sends out a

START, Slave address and address byte, but rather

than following up with data (as in a Write operation),

the Master then issues another START and

continuous with an Immediate Read sequence

(Figure 7).

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