AD9518-2 datasheet(47/64 Pages) AD

47 / 64 page

Data Sheet

AD9518-2

Rev. C | Page 47 of 64

Reg.

Addr.

(Hex)

Parameter

Bit 7 (MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

Default

Value

(Hex)

System

0x230

Power-down

and sync

Reserved

Power

down sync

Power

down

distribution

reference

Soft sync

0x00

0x231

Blank

Reserved

0x00

Update All Registers

0x232

Update all

registers

Blank

Update all

registers

(self-clearing

bit)

0x00

CONTROL REGISTER MAP DESCRIPTIONS

Table 43 through Table 49 provide a detailed description of each of the control register functions. The registers are listed by hexadecimal

address. A range of bits (for example, from Bit 5 through Bit 2) is indicated using a colon and brackets, as follows: [5:2].

Table 43. Serial Port Configuration and Part ID

Reg.

Addr

(Hex)

Bits

Name

Description

0x000

[7:4]

Mirrored, Bits[3:0]

Bits[7:4] should always mirror Bits[3:0] such that it does not matter whether the part is in MSB

or LSB first mode (see Bit 1, Register 0x000). The user should set the bits as follows:

Bit 7 = Bit 0.

Bit 6 = Bit 1.

Bit 5 = Bit 2.

Bit 4 = Bit 3.

Long instruction

Short/long instruction mode. This part uses long instruction mode only, so this bit should

always be set to 1b.

0: 8-bit instruction (short).

1: 16-bit instruction (long) (default).

Soft reset

Soft reset.

1: soft reset; restores default values to internal registers. Not self-clearing. Must be cleared to

0b to complete reset operation.

LSB first

MSB or LSB data orientation.

0: data-oriented MSB first; addressing decrements (default).

1: data-oriented LSB first; addressing increments.

SDO active

Selects unidirectional or bidirectional data transfer mode.

0: SDIO pin used for write and read; SDO set to high impedance; bidirectional mode (default).

1: SDO used for read, SDIO used for write; unidirectional mode.

0x003

[7:0]

Part ID (read only)

Uniquely identifies the dash version (-0 through -4) of the AD9518.

AD9518-0: 0x21.

AD9518-1: 0x61.

AD9518-2: 0xA1.

AD9518-3: 0x63.

AD9518-4: 0xE3.

0x004

Read back active registers

Selects register bank used for a readback.

0: reads back buffer registers (default).

1: reads back active registers.

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