AD6652BBC datasheet(55/76 Pages) AD

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AD6652

Rev. 0 | Page 55 of 76

EXTERNAL MEMORY MAP

The external memory map is the only way to gain access to the

four channel address register pages and the output port control

These registers are collectively referred to as the external

memory map registers, because they control all accesses to the

channel address space as well as output control registers.

The use of each of these individual registers is described in

detail in the following sections. It should be noted that the serial

control interface has the same memory map as the microport

interface and can carry out exactly the same functions, although

at a slower rate.

Table 22. External Memory Map

Address

Name

Comment

Access Control Register (ACR)

Auto increment

Broadcast

5–2:

Instruction[3:0]

1–0:

A[9:8]

Channel Address Registers (CAR)

7–0:

A[7:0]

SOFT_SYNC Control Register (Write Only)

PN_EN

Test_MUX_Select

Hop

Start

SYNC CH3

SYNC CH2

SYNC CH1

SYNC CH0

PIN_SYNC Control Register (Write Only)

Reserved write to logic low

First SYNC only

Hop_En

Start_En

PIN SYNC_EN D

PIN SYNC_EN C

PIN SYNC_EN B

PIN SYNC_EN A

SLEEP (Write Only)

7–6:

Reserved write to logic low

Access output port control registers

Reserved low

SLEEP CH3

SLEEP CH2

SLEEP CH1

SLEEP CH 0

Data Register 2 (DR2)

7–4:

Reserved

3–0:

D[19:16]

Data Register 1 (DR1)

15–8:

D[15:8]

Data Register 0 (DR0)

7–0:

D[7:0]

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