GC5018 Datasheet, PDF (60/115 Pages) Texas Instruments – 8-CHANNEL WIDEBAND RECEIVER

GC5018
8-CHANNEL WIDEBAND RECEIVER
SLWS169 – MAY 2005
www.ti.com
pmeter3_iq : When asserted, the pmeter3 block takes input from both rxin_c and rxin_d as a complex
sample pair. When de-asserted, only input from rxin_d is used for the power measurement.
pmeter2_iq : When asserted, the pmeter2 block takes input from both rxin_c and rxin_d as a complex
sample pair. When de-asserted, only input from rxin_c is used for the power measurement.
pmeter1_iq : When asserted, the pmeter1 block takes input from both rxin_a and rxin_b as a complex
sample pair. When de-asserted, only input from rxin_b is used for the power measurement.
pmeter0_iq : When asserted, the pmeter0 block takes input from both rxin_a and rxin_b as a complex
sample pair. When de-asserted, only input from rxin_a is used for the power measurement.
4.4.3.6 RECV_CONFIG1 Register
Register name: RECV_CONFIG1
BIT 15
msb_pos_d(2:0)
0
0
0
BIT 7
msb_pos_b(2:0)
0
0
0
Address: 0x5
offset_bin_d
0
offset_bin_b
0
msb_pos_c(2:0)
0
0
0
msb_pos_a(2:0)
0
0
0
BIT 8
offset_bin_c
0
BIT 0
offset_bin_a
0
msb_pos_X(2:0) : Places the MSB of the input word from the ADC. The value programmed into the 3 bits
is the number of bit positions to the left of bit16 in the input word, that the MSB is located.
For example, if a 14bit input word is driving rxin_a input and is aligned with rxin_a_0, then
msb_pos_a is programmed to “010” meaning 2 bits shifted down from bit 16 is the MSB.
X={a,b,c,d}.
offset_bin_X : rxin_X input data is in offset binary and not twos complement. If set, the input value will be
converted to 2s complement using the MSB from the corresponding msb_pos_X value.
X={a,b,c,d}
4.4.3.7 NZ_PWR_MASK Register
Register name: NZ_PWR_MASK
Address: 0x6
BIT 15
nz_pwr_mask (15:8)
0
0
0
0
0
0
BIT 7
nz_pwr_mask (7:0)
0
0
0
0
0
0
BIT 8
0
0
BIT 0
0
0
nz_pwr_mask(15:0) : Used with the rduz_sens_ena and selects the noise bits to be added to the ADC
input sample when asserted.
4.4.3.8 RECV_PMETER_SYNC Register
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GC5018 GENERAL CONTROL