ADRF6821 datasheet(40/61 Pages) AD

40 / 61 page

ADRF6821

Data Sheet

Rev. A | Page 40 of 61

Address: 0x000D, Reset: 0x04, Name: VENDOR_ID_H

VENDOR_ID

[ 7 :0 ] VEN D O R_ID [ 7 :0 ][ 1 5 :8 ] ( R)

Table 27. Bit Descriptions for VENDOR_ID_H

Bits

Bit Name

Settings

Description

Reset

Access

[7:0]

VENDOR_ID, Bits[15:8]

VENDOR_ID

0x456

Address: 0x0020, Reset: 0x00, Name: MASTER_CONFIG

Controls master enable, SPI mode, sleep mode, and the input word for the dc DAC.

3.3V SPI Output Level Selection

Mas ter Enable

[7:2] RESERVED

[0] SPI_18_33_SEL (R/W)

[1] EN_ANALOG_MASTER (R/W)

Table 28. Bit Descriptions for MASTER_CONFIG

Bits

Bit Name

Settings

Description

Reset

Access

[7:2]

RESERVED

Reserved.

0x0

EN_ANALOG_MASTER

Master Enable. Master enable for the DPD analog blocks. Active high.

0x0

R/W

SPI_18_33_SEL

3.3 V SPI Output Level Selection. The high level is 3.3 V, and the low level is 1.8 V.

0x0

R/W

Address: 0x0030, Reset: 0x00, Name: RF_SWITCH

RF SW Enable (0:off 1:on)

SPI Ov erride for Pin Sw itc h Selec tion

RF SW 1.8V Referenc e Enable (1:off

0:on), Ac tiv e Low

Se le c t RF1 Inp ut

Ex te rnal RF Sw itc h Status (RFSEL0 )

Selec t RF0 Input

Ex te rnal RF Sw itc h Status (RFSEL1)

[ 7 ] RES ERV ED

[ 0 ] EN _S W ( R/W )

[ 6 ] S EL_RFS W _S P I_CO N T RO L ( R/W )

[ 1 ] EN B_S W _1 P 8 _GEN ( R/W )

[ 5 ] RFS W _S EL1 ( R/W )

[ 2 ] RFS W _S EL0 _IN ( R)

[ 4 ] RFS W _S EL0 ( R/W )

[ 3 ] RFS W _S EL1 _IN ( R)

Table 29. Bit Descriptions for RF_SWITCH

Bits

Bit Name

Settings

Description

Reset

Access

RESERVED

Reserved.

0x0

SEL_RFSW_SPI_CONTROL

SPI Override for Pin Switch Selection.

0x0

R/W

RFSW_SEL1

Select RF1 Input. Software control for the RF channel selection (requires

that SEL_RFSW_SPI_CONTROL is set to 1).

0x0

R/W

Not selected (internal 50 Ω termination).

RF channel selected (signal connected to signal path).

RFSW_SEL0

Select RF0 Input. Software control for the RF channel selection (requires

that SEL_RFSW_SPI_CONTROL is set to 1).

0x0

R/W

Not selected (internal 50 Ω termination).

RF channel selected (signal connected to signal path).

RFSW_SEL1_IN

External RF Switch Status (RFSEL1). Readback status of the external RF

channel selection pin (RF_SEL1).

0x0

Not selected (internal 50 Ω termination).

RF channel selected (signal connected to signal path).

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