MCP960X datasheet(39/57 Pages) MICROCHIP

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DS20005426G-page 39

MCP960X/L0X/RL0X

5.3.2

ALERT HYSTERESIS REGISTER

This device integrates four individually controlled

temperature Alert Hysteresis registers for each alert

output, with a range of 0°C to +255°C.

The alert hysteresis directions are set using bit 3 of

the corresponding Alert Configuration registers

(Register 5-10) to detect rising or falling temperatures.

For rising temperatures, the hysteresis range is below

the alert limit where, as for falling temperatures, the

hysteresis range is above the alert limit, as shown in

Figure 5-10.

FIGURE 5-10:

Graphical Description of Alert Output Hysteresis Direction.

TABLE 5-5:

ALERT HYSTERESIS

REGISTERS

Alert 1 Hysteresis – THYST1

0000 1100

Alert 2 Hysteresis – THYST2

0000 1101

Alert 3 Hysteresis – THYST3

0000 1110

Alert 4 Hysteresis – THYST4

0000 1111

THYSTx: ALERT 1, 2, 3 AND 4 HYSTERESIS REGISTERS

R/W-0

128°C

64°C

32°C

16°C

8°C

4°C

2°C

1°C

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-0

Alert Hysteresis: Alert Hysteresis Range 0x00 to 0xFF bits (which represents +1°C to +255°C)

Cold

Hot

ste

res

Cold

Hot

ste

res

TALERT

THYST

TALERT

THYST

Rising Temperature

Falling Temperature

Alert Output

Cold

Hot

ste

res

TALERT

THYST

Rising Temperature

Cold

Hot

ste

res

TALERT THYST

Falling Temperature

Alert Output

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