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AS8650B

Datasheet - Application In form atio n

8.3 Register Space

The AS8650B register space consists of configuration registers, control registers and diagnostic registers. All of these registers are accessible

through SPI or I²C commands.

Table 21. Configuration Registers

Addr

Register Name

POR Value

Bit

Type

Description

0x00

Reserved

Reserved

0x01

Reserved

Reserved

0x02

WD Access Control

Register

0000_0000

POR_VLDO1

D[7:0]

R/W

0101_1010

WD Configuration Register access Enabled

Else WD Configuration Register access disabled

0x03

WD Configuration

Register

0000_1001

POR_VSUP

D[7:6]

R/W

01

WD disabled

Else WD enabled

D[5:3]

(Accuracy of the timings is ±25%)

000

80 ms

001

160 ms

010

320 ms

011

480 ms

100

800 ms

101

1000 ms

110

2000 ms

111

4000 ms

D[2:0]

Window Watchdog mode Window period Twwd_period

(50% of above value is trigger window)

000

10 ms

001

40 ms

010

80 ms

011

120 ms

100

160 ms

101

240 ms

110

320 ms

111

400 ms

0x04

WD Trigger Register

0000_0000

POR_VLDO1

D[7:1]

W

Reserved

D[0]

Watchdog trigger bit. The microcontroller set this bit within the

required window of watchdog timer. After this internal counter is

reset and this bit is cleared internally.