TMP468 datasheet(28/49 Pages) TI2

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TMP468

SBOS762B – NOVEMBER 2016 – REVISED JUNE 2017

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7.6.1.12 Block Read - Auto Increment Pointer

Block reads can be initiated by setting the pointer register to 80h to 87h. The temperature results are mirrored at

pointer addresses 80h to 88h; temperature results for all the channels can be read with one read transaction.

Setting the pointer register to any address from 80h to 88h signals to the TMP468 device that a block of more

than two bytes must be transmitted before a design stop is issued. In block read mode, the TMP468 device auto

increments the pointer address. After 88h, the pointer resets to 80h. The master must NACK the last byte read

so the TMP468 device can discontinue driving the bus, which allows the master to initiate a stop. In this mode,

the pointer continuously loops in the address range from 80h to 88h, so the register may be easily read multiple

times. Block read does not disrupt the conversion process.

7.6.1.13 Lock Register

To lock the registers, write 0x5CA6. To unlock the registers, write 0xEB19. When the lock function is enabled,

reading the register yields 0x8000; when unlocked, 0x0000 is transmitted.

7.6.1.14 Manufacturer and Device Identification Plus Revision Registers

The TMP468 device allows the two-wire bus controller to query the device for manufacturer and device

identifications (IDs) to enable software identification of the device at the particular two-wire bus address. The

manufacturer ID is obtained by reading from pointer address FEh; the device ID is obtained from register FFh.

Note that the most significant byte of the Device ID register identifies the TMP468 device revision level. The

TMP468 device reads 0x5449 for the manufacturer code and 0x0468 for the device ID code for the first release.

TMP468 Datasheet(PDF) 28 Page - Texas Instruments