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參數(shù)資料
| 型號： | TCM4400ETQFP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT |
| 中文描述： | 的GSM / DCS的基帶和語音的A / D和D / A射頻接口電路 |
| 文件頁數(shù)： | 48/64頁 |
| 文件大小： | 888K |
| 代理商： | TCM4400ETQFP |
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TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A – JULY 1999 – REVISED MARCH 2000
48
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
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RESERVD
: Reserved bits for testing purposes
BULQDAC: BASEBAND UPLINK Q DAC REGISTER
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ADDRESS: 5
R/W
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
RESERVD
0
0
1
0
0
1/0
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Power down register No. 2
The values in each bit position of power-down register No. 2 have the meaning outlined in Table 13.
Table 13. PWDNRG2 Register
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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.
R = 0
RESERVD
RESERVD
TIMGPN
TIMGPD
R/W
BBSIPN
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BBSIPD
VGAPPN
R/W
CHGUP
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0
VREFPN
R/W
VREFPD
0
<–ACCESS TYPE
1
0
0
0
1/0
R = 0
R/W
0
R/W
R/W
0
R/W
R/W
0
0
0
0
0
0
0
<–VALUE AT RESET
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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