ATTM02 datasheet(15/18 Pages) AME

15 / 18 page

AME, Inc.

ATTM01/ATTM02

Processor Thermal Monitor

Rev. B.01

10. Hardware Monitor Programming Guide

If want to this chip fully operation on PCB board the

first step it need setting the remote and local diode off-

set. This offset can eliminate the PCB trace, binding

wire loading. When software setting the offset register

to reduce side effect of PCB trace to minimum then the

temperature data accuracy is 0.5

℃

Setting the bit 5, bit4 of Thermal Sensor Control Reg-

ister can enable or disable the digital filter. When these

bit set to logic one then the digital filter will be turned

on, otherwise, these digital filter will be turned off.

In this chip has a parity check mechanism to avoid

the software reading remote or local temperature data

and the ADC converting temperature into this register. In

other words, when the software reading the temperature

data (register 8

’h0, 8’h1, 8’h10, 8’h30) and at the

same time the ADC want converting temperature data to

’h0, 8’h1, 8’h10, or 8’h30 then the parity

check mechanism will halt the ADC converting tempera-

ture data to these registers before software read finish

these register. In order to make parity check mecha-

nism can work well when read the temperature data it

need read the high byte temperature data at first and

continue read the low byte temperature data, i.e., read

the temperature data register the first need read regis-

ter 8

’h0 or 8’h1 and consecutive read register 8’h30

or 8

’h10.

When the software want to reduce the supply current

it can enable the one shot mode and this mode opera-

tion only at standby mode, i.e., bit 6 of Configuration

“1”. The software need set the bit 1 of

’hF address to “1” and consecutive set this

bit to

“1” to generate one pulse signal.

The bit 7 (BUSY) of status register will not effect the

reading temperature data. Because of this bits only show

that ADC converting data.

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