GC5018 Datasheet, PDF (98/115 Pages) Texas Instruments – 8-CHANNEL WIDEBAND RECEIVER

GC5018
8-CHANNEL WIDEBAND RECEIVER
SLWS169 – MAY 2005
www.ti.com
agc_gaina(7:0)
0
0
0
0
0
0
0
0
agc_gaina(15:0) : This is the lower 16 bits of the total 24 bits of programmable gain. The gain value is
always positive with the upper 12 bits being the integer value and the lower 12 bits being the
fractional. This gain value is used for all UMTS operations and for A channel data when in
CDMA mode. A 24-bit value of 00000000001.000000000000 is unity gain.
4.4.5.22 AGC_GAINB Register
Register name: AGC_GAINB
BIT 15
0
0
BIT 7
0
0
Address: 0x15
0
0
DOUBLE BUFFERED, REQUIRES SYNC FOR LOADING
BIT 8
agc_gainb(15:8)
0
0
0
0
0
BIT 0
agc_gainb(7:0)
0
0
0
0
0
agc_gainb(15:0) : This is the lower 16 of the total of 24 bit of programmable gain. The gain value is
always positive with the upper 12 bits being the integer value and the lower 12 bits being the
fractional. This gain value is used for B channel data when in CDMA. A 24-bit value of
00000000001.000000000000 is unity gain.
4.4.5.23 AGC_AMAX Register
Register name: AGC_AMAX
Address: 0x16
BIT 15
BIT 8
agc_amax(15:8)
0
0
0
0
0
0
0
0
BIT 7
BIT 0
agc_amax(7:0)
0
0
0
0
0
0
0
0
agc_amax(15:0) : This is the maximum gaina or gainb can be adjusted up. The value programmed is a
positive value that is used to generate the most positive AGC gain adjust. For example, if
512 is programmed, the maximum gain will be the programmed gain (AGC_GAINA/B) + 512.
4.4.5.24 AGC_AMIN Register
Register name: AGC_AMIN
Address: 0x17
BIT 15
BIT 8
agc_amin(15:8)
0
0
0
0
0
0
0
0
BIT 7
BIT 0
agc_amin(7:0)
0
0
0
0
0
0
0
0
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GC5018 GENERAL CONTROL