TCM4400 Datasheet, PDF (63/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

4.10.18 Auxiliary Functions Control Register 1
The bit values in the auxiliary functions control register 1 reset the APC generator or the AFC modulator,
select the A/D counter input, and select the AFC sampling frequency. This is defined in Table 4–23.
Table 4–23. AUX Functions Control Register 1
UXCTL1: AUXILIARY FUNCTIONS CONTROL REGISTER 1
ADDRESS: 13 R/W
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{AFCPN AFCPD ADC ADC AFCC AFCC ADCC ADCC ADCC ARST 0 1 1 0 1 1/0}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{PN PD K1 K0 H2}
H1
H0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
←ACCESS TYPE
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ⁰
0
0
0
0
0
0
0
0
0
←VALUE AT RESET
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _ARST:
This bit resets the digital parts for the auxiliary function (APC generator and
AFC modulator). This is not a toggle bit and has to be set to 0 to remove the
reset condition.
ADCCH (0 – 2):
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _ADCCH2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1
1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
This bit selects the input of the ADC (see Table 4–24).
Table 4–24. ADC Selection
ADCCH1
0
0
1
1
0
0
1
1
ADCCH0
0
1
0
1
0
1
0
1
A/D CONVERTER INPUT SELECTION
A/D conversion of ADIN1
A/D conversion of ADIN2
A/D conversion of ADIN3
A/D conversion of ADIN4
A/D conversion of ADIN5
A/D conversion of ADIN5
A/D conversion of ADIN5
A/D conversion of ADIN5
AFCCK (0 –1): This bit selects the sampling frequency of the AFC (see Table 4–25).
AFCCK1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
Table 4–25. AFC Selection
AFCCK0
AFC INTERNAL FREQUENCY
0
0.25 MHz
1
0.50 MHz
0
1 MHz
1
2 MHz
AFCPN: If this bit is cleared to 0, the AFC block is powered down under the control of the
PWRDN terminal. If this bit is set to 1, the power down is controlled only by bit
AFCPD.
AFCPD:
This bit is functionally associated with and paired with bit AFCPN. When the AFCPN
bit is 1, the AFC block is active. When the AFCPD bit is set to 1, the AFCPD block is in
power-down mode.
ADCPN:
If this bit is cleared to 0, the auxiliary ADC block is powered down when under the
control of PWRDN. If this bit is set to 1, the power down is controlled only by bit
ADCPD.
ADCPD:
This bit is functionally associated with and paired with bit ADCPN. When the ADCPN
bit is set to 1, an auxiliary ADC is active. When the ADCPD bit is set to 1, the auxiliary
ADCPD is in power-down mode.
4–27