AFE8220-Q1 Datasheet, PDF (38/49 Pages) Texas Instruments – DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO

AFE8220-Q1
SBAS455A – JANUARY 2009 – REVISED JULY 2009....................................................................................................................................................... www.ti.com
Table 24. Control Registers (continued)
Address: 26
Description: DDC1 FIR Filter Extended Features
Bits
Range
Action
Parameter Name
3:0
0..15
Post-filter shift for FIR filter 2A
ddc1_fir2a_shift(3:0)
7:4
0..15
Post-filter shift for FIR filter 2B
ddc1_fir2b_shift(3:0)
8
0/1
Enable interleave mode for FIR filter 2A and FIR filter 2B
ddc1_interleave
9
0/1
Disable decimation for FIR filter 1
ddc1_fir1_nodec
10
0/1
Disable decimation for FIR filter 2A and FIR filter 2B
ddc1_fir2_nodec
Address: 27
Description: Data Interface Configuration
Bits
Range
Action
Parameter Name
15:0
0..65535
Configuration for IF_DOUT0
if_dout0_config
Address: 28
Description: Data Interface Configuration
Bits
Range
Action
Parameter Name
15:0
0..65535
Configuration for IF_DOUT1
if_dout1_config
Address: 29
Description Data Interface Configuration
Bits
Range
Action
Parameter Name
15:0
0..65535
Configuration for IF_DOUT2
if_dout2_config
Address: 30
Description: Data Interface Configuration
Bits
Range
Action
Parameter Name
15:0
0..65535
Configuration for IF_DOUT3
if_dout3_config
Address: 31
Description: Data Interface Configuration
Bits
Range
Action
Parameter Name
4:0
0..16
Divide factor to derive IF_DCLK from MCLK
if_dclk_div(4:0)
0: IF_DFSO and IF_DOUTx change on rising edge of IF_DCLK
5
0/1
if_dclk_edge
1: IF_DFSO and IF_DOUTx change on falling edge of IF_DCLK
0: IF_DFSO generated by DDC0
6
0/1
1: IF_DFSO generated by DDC1
if_dfso_select
0: IF_DFSO one IF_DCLK cycle wide
8:7
0..2
1: IF_DFSO toggles once per frame
if_dfso_mode(1:0)
2: IF_DFSO 16 IF_DCLK cycles wide
Address: 32–36
Description: Not Used
Bits
Range
Action
Parameter Name
—
—
—
—
Address: 37
Description: CDAC0 Output
Bits
Range
Action
Parameter Name
11:0
0..4095
Output value for CDAC0
cdac0_out(11:0)
Address: 38
Description: CDAC1 Output
Bits
Range
Action
Parameter Name
11:0
0..4095
Output value for CDAC1
cdac1_out(11:0)
38
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