ADS8699IPWR datasheet(49/74 Pages) TI2

49 / 74 page

7.6.1.2 RST_PWRCTL_REG Register (address = 04h)

This register controls the reset and power-down features offered by the converter.

Any write operation to the RST_PWRCTL_REG register must be preceded by a write operation with the register

address set to 05h and the register data set to 69h.

Figure 7-18. RST_PWRCTL_REG Register

Reserved

R-0000h

WKEY[7:0]

Reserved

VDD_AL_

DIS

IN_AL_DIS

Reserved

RSTn_APP

NAP_EN

PWRDN

R/W-00h

R-00b

R/W-0b

R-0b

R/W-<0>b

R/W-0b

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset; -0, -1 = Condition after application reset;

LEGEND: -<0>, -<1> = Condition after power-on reset

Address for bits 7-0 = 04h

Address for bits 15-8 = 05h

Address for bits 23-16 = 06h

Address for bits 31-24 = 07h

Table 7-12. RST_PWRCTL_REG Register Field Descriptions

Bit

Field

Type

Reset

Description

31-16

Reserved

0000h

Reserved. Reads return 0000h.

15-8

WKEY[7:0]

R/W

00h

This value functions as a protection key to enable writes to bits 5-0.

Bits are written only if WKEY is set to 69h first.

7-6

Reserved

00b

Reserved. Reads return 00b

VDD_AL_DIS

R/W

0b = VDD alarm is enabled

1b = VDD alarm is disabled

IN_AL_DIS

R/W

0b = Input alarm is enabled

1b = Input alarm is disabled

Reserved

Reserved. Reads return 0h.

RSTn_APP(1)

R/W

0b = RST pin functions as a POR class reset (causes full device

initialization)

1b = RST pin functions as an application reset (only user-programmed

modes are cleared)

NAP_EN(2)

R/W

0b = Disables the NAP mode of the converter

1b = Enables the converter to enter NAP mode if CONVST/CS is held high

after the current conversion completes

PWRDN(2)

R/W

0b = Puts the converter into active mode

1b = Puts the converter into power-down mode

(1)

Setting this bit forces the RST pin to function as an application reset until the next power cycle.

(2)

See the Electrical Characteristics table for details on the latency encountered when entering and exiting the associated low-power

mode.

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ADS8691, ADS8695, ADS8699

SBAS777B – DECEMBER 2016 – REVISED MARCH 2021

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