T2801 データシートの表示（PDF） - Atmel Corporation
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T2801 Datasheet PDF : 31 Pages
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T2801
4. Control Signals
Table 4-1. Control Signals – Functions
Signal
Function
I_CPSW
Controls the charge pump current
PU_REG
Activates AUX voltage regulator supplying the complete transceiver
PU_VCO
Activates VCO voltage regulator which supplies only the VCO
PU_RX/TX
Activates RX/TX blocks
PU_PLL
Activates PLL circuits: PC, PD, CP, RC
RX_ON
Activates RX circuits: BBF, DEMOD, IF AMP, IR MIXER
TX_ON
Activates TX circuits: TX–DRIVER, RAMP GEN. Starts RAMP
SIGNAL at RAMP OUT
Data Word 1, Bit D10
Activates GF in TX mode
Data Word 1, Bit D9
Activates MCC in TX mode
Table 4-2. Control Signals – Modes
Mode
PU_REG
PU_VCO
PU_RX/TX
PU_PLL
RX_ON
TX_ON
BB filter
Demodulator
IF amplifiers and RSSI
IR mixer
RX switch
TX switch
TX driver
Ramp generator
Programmable counter
Voltage-controlled oscillator
Gaussian filter
Phase detector/charge pump
Modulation compensation circuit
Reference counter
Typical current consumption/mA at VS = 3.2 V
TX Mode
1
1
1
1
0
1
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
54
RX Mode
1
1
1
1
1
0
ON
ON
ON
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
ON
85
RSSI Only
1
1
1
1
1
1
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
ON
80
17
4567B–DECT–03/06
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