Publication Release Date: July, 2008

- 4 -

Version: 1.3

W83772G

7.3

Power-On Reset

The power-on reset threshold is 2.7V (typical). When Vcc crosses this threshold, the internal reset

signal will be asserted for 4mS. During this time period, W83772G is in the reset state. When the

internal reset signal is de-asserted, W83772G is in the operating state.

In the operating state, if Vcc drops below 2.4V and then rises above 2.7V, the internal reset signal will

be asserted immediately. Figure 1 illustrates the reset mechanism.

.

Figure 1.

7.4

Measured Temperature Data Format

The W83772G temperature data format of both remote and local temperature is 16-

bit two’s

complement format.

Table 1 shows some representative temperature data with 16-

bit two’s complement data format.

TEMPERATURE

16-BIT DIGITAL OUTPUT

+80°C

0001 0100 00

00 0000

+79.875°C

0001 0011 11

11 1000

+1°C

0000 0000 01

00 0000

+0°C

0000 0000 00

00 0000

-1°C

1111 1111 11

00 0000

- 5°C

1111 1110 11

00 0000

Integer Value

Fractional Value

Table 1. Temperature Data Format

0V

2.4V

2.7V

3.3V

VCC

Internal Reset Signal

4ms

4ms

2.7V

3.3V