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| 型號： | PCF5083 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | STEEL COVER |
| 中文描述： | GSM信號處理IC |
| 文件頁數(shù)： | 27/136頁 |
| 文件大小： | 602K |
| 代理商： | PCF5083 |
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1996 Oct 29
27
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
Table 13
Register selection for the Rx burst
8.3.2.4
MON burst during idle frame
This burst is a special case of the MON burst. It is used for FCB search and for monitoring during the idle frame. If
RECON is set, a timing equivalent to the MON burst timing is generated, with the exception that all output lines (BEN,
RXON, PDRXx etc.) are kept active at the end of the burst. The output lines are set inactive again during the first frame
with RECMON set at the time, they normally would be deactivated at the end of a MON burst. During the frames in
between, either RECON = 1, or RECRX = RECTX = RECMON = RECON = SEND = 0 must be programmed.
8.3.2.5
Register mode switching
Which of the registers MODE0_REG or MODE1_REG is used for timing generation is determined using the following two
rules:
1.
After any write access to MODE0_REG, MODE0_REG is active during the next frame.
2.
After every frame the USEMODE flag of the currently active register determines which register is used during the
next frame, unless there was a write access to MODE0_REG during the current frame.
e.g. MODE0_REG: USEMODE = 1 and MODE1_REG: USEMODE = 0 is programmed during frame N.
This causes the following timing:
a) MODE0_REG is active during frame N + 1
b) MODE1_REG is active during frame N + 2
c) MODE0_REG is active during frame N + 3 and so on, until MODE0_REG is being written again.
8.3.2.6
DTX Mode Processing
DTX mode (Discontinuous Transmission) is enabled with MODEx_REG[DTX] = 1. In DTX mode, the DSP makes the
decision whether a TX burst should be generated or not. The DTX condition is signalled via IO4 (generate transmit burst:
IO4 = 0, no transmit burst: IO4 = 1). If no TX burst is to be generated, the power-down lines TXKEY1/2, (N)PDTX1/2 and
PDSYN are kept inactive or if already asserted, they are set inactive again. (N)PDBIAS become inactive with their default
delay of 8 bit after (N)PDTX1/2 respective PDSYN if they were already asserted, otherwise they also remain inactive.
TXON and BEN are not affected from DTX mode.
8.3.2.7
Interface to the RF-IC Bus
The Timing Generator provides trigger signals for the frequency and gain control channels of the RF-IC interface when
the quarterbit counter matches either RXSTART_REG, TXSTART_REG or MONSTART_REG. Further trigger signals
are generated for the gain control channel after every receive burst to send the contents of register DACOFF_REG and
prior to a receive burst if the quarterbit counter matches xxSTART_REG + 1024
AGCSTART_REG
×
32 (xx = RX, TX
or MON) to send the contents of register DACON_REG (refer to Section 8.4).
Note, if the generation of a trigger signal falls into an active burst, the trigger signal is delayed until the end of the current
burst.
RXLENGTH1
RXLENGTH0
REGISTER SELECTED
0
0
1
1
0
1
0
1
RXBURST0_REG is used.
RXBURST1_REG is used.
RXBURST2_REG is used.
Undefined during a RX burst.
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| PCF51AC128ACFUE | 功能描述:32位微控制器 - MCU 32 Bit 128K FLASH 32K RAM CAN EN RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風格:SMD/SMT |
| PCF51AC128ACLKE | 功能描述:32位微控制器 - MCU 32 Bit 128K FLASH 32K RAM CAN EN RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風格:SMD/SMT |
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