ADM1266ACPZ-R7 datasheet(49/62 Pages) AD

49 / 62 page

Data Sheet

ADM1266

Rev. A | Page 49 of 62

GO_COMMAND

This command triggers various functions.

Table 66. Register 0xD8—GO_COMMAND

Bits

Bit Name

R/W

Description

[15:5]

Reserved

Reserved.

Seamless reset

Writing 1 to this bit enables seamless reset of the sequence by jumping to the PGOOD state. Writing

0 to this bit disables seamless reset of the sequence by jumping to State 0.

SEQUENCE_MODE

Writing 1 to this bit enables sequence debug mode. Writing 0 to this bit enables sequence normal mode.

Hardware reset

Writing 1 to this bit resets the CPU.

SEQUENCE_RESET

Writing 1 to this bit resets the sequence. Writing 0 to this bit does not reset the sequence.

Run/stop

Writing 1 to this bit stops the sequence. Writing 0 to this bit runs the sequence.

READ_STATE

The READ_STATE command returns the current value of the state bit that the sequencer is executing.

Table 67. Register 0xD9—READ_STATE

Bits

Bit Name

R/W

Description

[15:0]

State

Current state number that the sequencer is executing.

VOUT_MARGIN_LOOP

The VOUT_MARGIN_LOOP command either sets or reads the gain (R1/R3), which is used to calculate the VFB (feedback voltage)

according to the DAC output and VOUT. For the relationship of VFB, VOUT, and the output of DAC, see Figure 12.

Table 68. Register 0xDA—VOUT_MARGIN_LOOP

Bits

Bit Name

R/W

Description

[15:11]

Exponent N

R/W

Twos complement Exponent N used in linear data format (X = Y × 2N).

[10:0]

Mantissa Y

R/W

Twos complement Mantissa Y used in linear data format (X = Y × 2N).

MARGIN_CONFIGURATION

The MARGIN_CONFIGURATION command either sets or reads the ramp step in margining.

Table 69. Register 0xDB—MARGIN_CONFIGURATION

Bits

Bit Name

R/W

Description

[15:12]

Reserved

Reserved.

[11:8]

RAMP_INTERVAL

R/W

Ramp interval time, interval: 0.1 ms.

[7:0]

RAMP_STEP

R/W

Number of DAC codes to increment for each step.

BREAKPOINTS

This command either block writes or reads the breakpoints for the sequence states.

Table 70. Register 0xDC—BREAKPOINTS (Block WR)

Byte

Byte Name

R/W

Description

Parameter

length

Block W

Number of bytes of parameter data, fix to 1.

Data length

Block W

The length of breakpoints data to read back. Maximum = 128 bytes.

Data length

Block R

The length of the breakpoints data that the ADM1266 returns.

[128:1]

Data

Block R

Bit 0 of Byte 1 sets the breakpoint for State 1, Bit 1 of Byte 1 sets the breakpoint for State 2,

incrementing up to Bit 7 of Byte 128 sets the breakpoint for State 1024. Maximum value of N = 128.

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