ST70136

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Figure 4 : Control Register Interface Read cycle

4.7.1 - AFE registers

4.7.1.1 - Rx Gain Control

This register is located at the address “000” and is used to program the gain in the receive path.

4.7.1.2 - Tx Gain Control

This register is located at the address “001” and is used to program the gain in the transmit path.

Table 2 : Rx Gain Control (address [b2:b0]=”000”)

Name

Pos.

Type

Def.

Description

GC[1:0]

14.13

R/W

00

bit14: selects External Gain Control

GC1

bit13: selects External Gain control

GC0

Other

12

R/W

0

Reserved

RxAGC

11..7

R/W

00000

Select internal gain for Receive amplifier

00000 : 0dB

11111 : 31dB

RxAtt

6..5

R/W

00

Receive attenuator

00 = 0dB

01 = -4dB

10 = -8dB

11 = -12dB

Other

4.3

R/W

00

Reserved

Table 3 : Tx Gain Control (address [b2:b0]=”001”)

Name

Pos.

Type

Def.

Description

TxAGC

14..11

R/W

0000

Select internal gain for Transmit amplifier

0000 : -15dB

1111 : 0dB

Other

10..3

R/W

0..0

Reserved

CLKM

CLKWD

Don’t care

[b2:b0]

CTRLIN

Data [b14:b3]

CTRLOUT

R/NW

b15

b15