TCM4400E Datasheet, PDF (48/64 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A – JULY 1999 – REVISED MARCH 2000
PRINCIPLES OF OPERATION
Table 12. Uplink Q DAC Register
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _RESERVD
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _R
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
RESERVD
R
0
BULQDAC: BASEBAND UPLINK Q DAC REGISTER
RESERVD RESERVD RESERVD RESERVD RESERVD RESERVD
R
R
R
R
R
R
0
1
1
1
1
1
RESERVD
R
1
RESERVD
R
1
ADDRESS: 5 R/W
0 0 1 0 0 1/0
<–ACCE0S TYPE
<–VALUE AT RESET
RESERVD
: Reserved bits for testing purposes
Power down register No. 2
The values in each bit position of power-down register No. 2 have the meaning outlined in Table 13.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{RESERVD RESERVD}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{R = 0}
R=0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
0
Table 13. PWDNRG2 Register
PWDNRG2: REGISTER FOR POWERING DOWN
TIMGPN
R/W
TIMGPD
R/W
BBSIPN
R/W
BBSIPD
R/W
VGAPPN
R/W
CHGUP
R/W
0
0
0
0
0
0
VREFPN
R/W
0
VREFPD
R/W
0
ADDRESS: 8 R/W
0 1 0 0 0 1/0
<–ACCESS TYPE
<–VALUE AT RESET
VREFPN: If cleared to 0, the internal reference voltage is powered down under the control of terminal
PWRDN and bit VREFPD. If bit VREFPN is set to 1, the power down is only controlled by bit
VREFPD.
VREFPD: This bit is functionally associated with bit VREFPN.
VGAPPN: If cleared to 0, the internal reference VGAP is powered down under the control of terminal
PWRDN. If this bit is set to 1, the VGAP is not placed in power-down mode.
TIMGPN: If cleared to 0, the internal reference VGAP is powered down under the control of terminal
PWRDN. If this bit is set to 1, the power-down control is only controlled by bit TIMPGD
TIMGPD: This bit is functionally associated with bit TIMGPN.
BBSIPN: If cleared to 0, the baseband serial interface is powered down under the control of terminal
PWRDN. If this bit is set to 1, the power down is only controlled by bit BBSIPD.
BBSIPD: This bit is functionally associated with bit BBSIPN. When this bit is set to 1, baseband serial
interface is in power-down mode.
CHGUP: This bit is used for testing purposes to accelerate the bandgap settling time.
RESRVD: Reserved bits for testing purpose
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