TCM4400E Datasheet, PDF (60/64 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
baseband uplink register (address 24)
The baseband uplink register (BULCTL) is a 3-bit register (see Table 38) that permits mismatch compensation
in the RF transmit mixer, and 1 bit (OUTLEV) to set the differential output dynamic range (V_PP) to 2 times V_ref
when OUTLEV = 0 or to 8/15 V_ref when OUTLEV = 1. Gain mismatches of 0 dB, –0.25 dB, –0.5 dB, and –0.75
dB are permitted between the I and Q channel as shown in Table 39.
Table 38. Uplink Register BULCTL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^{BULCTL: BASEBAND UPLINK CONTROL REGISTER}
RESERVD RESERVD RESERVD RESERVD RESERVD RESERVD OUTLEV IQSEL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _R=0
R=0
R=0
R=0
R=0
R=0
R/W
R/W
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
0
0
0
0
0
0
0
G1
R/W
0
G0
R/W
0
ADDRESS: 24 R/W
1 1 0 0 0 1/0
<–ACCESS TYPE
<–VALUE AT RESET
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _BIT2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ IQSEL
0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₁
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1
Table 39. BLKCTL Register
BIT1
G1
0
0
1
1
0
0
1
1
BIT0
G0
0
1
0
1
0
1
0
1
GAIN I
0 dB
–0.25 dB
–0.50 dB
–0.75 dB
0 dB
0 dB
0 dB
0 dB
GAIN Q
0 dB
0 dB
0 dB
0 dB
0 dB
– 0.25 dB
–0.50 dB
–0.75 dB
power on status register (address 25)
The power-on status register is a 9 bit read-only register which displays the status power-on / power-down of
the functions having several power on/off controls. When the function is in power-on the corresponding bit is
at 1.
Table 40. Power On Register PWONCTL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _RESERVD
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _R=0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ₀
BGAPON
R
0
PWONCTL: POWER-ON STATUS REGISTER
VREFON BBIFON TIMIFON VMIDON AFCON
R
R
R
R
R
0
0
0
0
0
ADCON
R
0
AGCON
R
0
APCON
R
0
ADDRESS: 25 R/W
1 1 0 0 1 1/0
<–ACCESS TYPE
<–VALUE AT RESET
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