AD5758 datasheet(62/72 Pages) AD

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AD5758

Data Sheet

Rev. 0 | Page 62 of 72

Watchdog Timer (WDT) Configuration Register

Address: 0x0F, Reset: 0x0D0009, Name: WDT_CONFIG

This register configures the WDT timeout values. This register also configures the WDT setup in terms of acceptable resets and the

resulting response to a WDT fault (for example, clear the output or reset the device).

Table 40. Bit Descriptions for WDT_CONFIG

Bits

Bit Name

Description

Reset

Access

FAULT_PIN_STATUS

The FAULT_PIN_STATUS bit reflects the inverted current status of the FAULT pin.

0x0

[20:16]

REGISTER_ADDRESS

0x0

[15:11]

Reserved

Reserved. Do not alter the default value of these bits.

0x0

CLEAR_ON_WDT_FAIL

Enable clear on WDT fault. If the WDT times out, a clear event occurs, whereby the

output is loaded with the clear code stored in the CLEAR_CODE register.

0x0

R/W

0: disable (default).

1: enable.

RESET_ON_WDT_FAIL

Enable a software reset to automatically occur if the WDT times out.

0x0

R/W

0: disable (default).

1: enable.

KICK_ON_VALID_WRITE

Enable any valid SPI command to reset the WDT. Any active WDT error flags must

be cleared before the WDT can be restarted.

0x0

R/W

0: disable (default).

1: enable.

Reserved

Reserved. Do not alter the default value of this bit.

0x0

R/W

WDT_EN

Enables the WDT, then starts the WDT, assuming there are no active WDT fault flags.

0x0

R/W

0: disable (default).

1: enable.

[5:4]

Reserved

Reserved. Do not alter the default value of these bits.

0x0

R/W

[3:0]

WDT_TIMEOUT

Set the WDT timeout value. Setting WDT_TIMEOUT to a binary value beyond

0b1010 results in the default setting of 1 sec.

0x9

R/W

0000: 1 ms.

0001: 5 ms.

0010: 10 ms.

0011: 25 ms.

0100: 50 ms.

0101: 100 ms.

0110: 250 ms.

0111: 500 ms.

1000: 750 ms.

1001: 1 sec (default).

1010: 2 sec.

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