AMC131M01DFMR datasheet(42/81 Pages) TI

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SCLK

DIN

DOUT

Don’t Care

Response

Hi-Z

RESET

CRC

RESET command

latched here

Figure 8-21. RESET Command Frame

8.5.3.3 STANDBY (0000 0000 0010 0010)

The STANDBY command places the device in a low-power standby mode. The command is latched by the

device at the end of the frame. The device enters standby mode immediately after the command is latched. Set

the DCDC_EN bit in the DCDC_CTRL register to 0b to disable the DC/DC converter before entering standby

mode. See the Standby Mode section for more information. This command has no effect if the device is already

in standby mode.

8.5.3.4 WAKEUP (0000 0000 0011 0011)

The WAKEUP command returns the device to conversion mode from standby mode. This command has no

effect if the device is already in conversion mode.

Set the DCDC_EN bit in the DCDC_CTRL register to 1b to enable the DC/DC converter after sending the

WAKEUP command.

8.5.3.5 LOCK (0000 0101 0101 0101)

The LOCK command locks the interface, preventing the device from accidentally latching unwanted commands

that can change the state of the device. When the interface is locked, the device only responds to the NULL,

RREG, and UNLOCK commands. The device continues to output conversion data even when locked.

8.5.3.6 UNLOCK (0000 0110 0101 0101)

The UNLOCK command unlocks the interface if previously locked by the LOCK command.

8.5.3.7 RREG (101a aaaa annn nnnn)

The RREG command reads the device registers. The binary format of the command word is 101a aaaa annn

nnnn, where a aaaa a is the binary address of the register to begin reading and nnn nnnn is the unsigned

binary number of consecutive registers to read minus one. There are two cases for reading registers on the

AMC131M01. When reading a single register (nnn nnnn = 000 0000b), the device outputs the register contents

in the command response word of the following frame. If multiple registers are read using a single command

(nnn nnnn > 000 0000b), the device outputs the requested register data sequentially in order of addresses.

AMC131M01

SBASA57 – SEPTEMBER 2023

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