AD9558 datasheet(62/104 Pages) AD

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AD9558

Data Sheet

Rev. A | Page 62 of 104

Register addresses that are not listed in Table 35 are not used, and writing to those registers has no effect. The user should write the

default value to sections of registers marked reserved. R = read-only. A = autoclear. E = excluded from EEPROM loading. L = live (I/O

update not required for register to take effect or for a read-only register to be updated).

Table 35. Register Map

Reg

Addr

(Hex)

Opt

Name

Def

Serial Control Port Configuration and Part Identification

0x0000

L, E

SPI control

SDO enable

LSB first/

increment

address

Soft reset

Reserved

0x0000

I²C control

Reserved

Soft reset

Reserved

0x0004

Readback

control

Reserved

Read buffer

0x0005

A, L

I/O update

Reserved

I/O update

0x0006

User scratch

pad

User scratch pad[7:0]

0x0007

User scratch pad[15:8]

0x000A

R, L

Silicon rev

Silicon revision[7:0]

0x000B

R, L

Reserved

0x000C

R, L

Part ID

Clock part family ID[7:0]

0x000D

R, L

Clock part family ID[15:8]

System Clock

0x0100

SYSCLK config

PLL feedback

divider

System clock N divider[7:0]

0x0101

Reserved

Load from

ROM

(reserved)

SYSCLK XTAL

enable

SYSCLK P divider[1:0]

SYSCLK

doubler

enable

0x0102

Reserved

0x0103

SYSCLK period

Nominal system clock period (fs), Bits[7:0] (1 ns at 1 ppm accuracy)

0x0104

Nominal system clock period (fs), Bits[15:8] (1 ns at 1 ppm accuracy)

0x0105

Reserved

Nominal system clock period (fs), Bits[20:16]

0x0106

SYSCLK

stability

System clock stability period (ms), Bits[7:0]

0x0107

System clock stability period (ms), Bits[15:8]

0x0108

Reserved

Reset

SYSCLK

stab timer

(autoclear)

System clock stability period (ms), Bits[19:16]

(not autoclearing)

General Configuration

0x0200

EN_MPIN

Reserved

Enable M pins

and IRQ pin

function

0x0201

M0FUNC

Output/inputE

Function[6:0]

0x0202

M1FUNC

Output/AinputE

Function[6:0]

0x0203

M2FUNC

Output/AinputE

Function[6:0]

0x0204

M3FUNC

Output/AinputE

Function[6:0]

0x0205

M4FUNC

Output/AinputE

Function[6:0]

0x0206

M5func

Output/AinputE

Function[6:0]

0x0207

M6FUNC

Output/AinputE

Function[6:0]

0x0208

M7FUNC

Output/AinputE

Function[6:0]

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