AD9517-0ASLASHPCBZ datasheet(59/80 Pages) AD

59 / 80 page

Data Sheet

AD9517-0

Rev. E | Page 59 of 80

CONTROL REGISTER MAP DESCRIPTIONS

Table 53 through Table 62 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 53. 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] so 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 AD9517

AD9517-0: 0x11

AD9517-1: 0x51

AD9517-2: 0x91

AD9517-3: 0x53

AD9517-4: 0xD3

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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