GSM850 Datasheet, PDF (22/38 Pages) Silicon Laboratories – Single 8x8 mm package CMOS process technology Intergrated GSM/GPRS transceiver including

Aero I
Register 01h. Reset
Bit D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 RESET
Bit
17:1
0
Name
Reserved
RESET
Function
Program to zero.
Chip Reset.
0 = Normal operation (default).
1 = Reset all registers to default values.
Note: See “Control Registers” on page 21 for more details. This register must be
written to 0 twice after a reset operation. This bit does not reset registers
31h to 35h.
Register 02h. Mode Control
Bit D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 AUTO MODE[1:0]
Bit
17:3
2
1:0
Name
Reserved
AUTO
MODE[1:0]
Program to zero.
Function
Automatic Mode Select.
0 = Manual. Mode is controlled by MODE[1:0] bits (default).
1 = Automatic. Last register write to N_RF1 implies RX mode; Last register
write to N_RF2 implies TX mode. MODE[1:0] bits are ignored.
Transmit/Receive/Cal Mode Select.
00 = Receive mode (default).
01 = Transmit mode.
10 = Calibration mode.
11 = Reserved.
Note: These bits are valid only when AUTO = 0.
Note: Calibration must be performed each time the power supply is applied. To initiate the calibration mode, set
MODE[1:0] = 10 and pulse the PDN pin high for at least 150 µs.
22
Rev. 1.0