STW82100B Datasheet, PDF (39/67 Pages) STMicroelectronics – RF down converter with embedded integer-N synthesizer

STW82100B
I2C bus interface
9.3.2
I²C register definitions
FUNCTIONAL_MODE
7
6
5
ALC_PD
PKD_EN
W
W
Address:
Type:
Reset:
0x00
W
0x00
Functional mode register
4
3
2
PD[4:0]
W
1
0
B11
W
[7] ALC_PD: for test purpose only must be set to ’0’. (ALC ON)
[6] PKD_EN: for test purpose only must be set to ’0’. (Peak detector output on pin 36 OFF)
[5:1] PD[4:0]: bits used to select different functional modes for the STW82100B according to
the following table
00000: (0 decimal) Power down mode
00001: (1 decimal) Standard Mode VCOA (VCOA and RX chain ON)
00010: (2 decimal) Standard Mode VCOB (VCOB and RX chain ON)
00011: (3 decimal). Diversity Slave Mode (ExtVCO/LO input buffer and RX Chain ON;
internal synthesizer OFF)
00100: (4 decimal) Diversity Master Mode VCOA (VCOA, RX Chain and LO output
buffer ON)
00101: (5 decimal) Diversity Master Mode VCOB (VCOB, RX Chain and LO output
buffer ON)
00110: (6 decimal) External LO Standard Mode (RX Chain ON; PLL and ExtVCO/LO
input buffer ON)
00111: (7 decimal) External LO Diversity Master Mode (RX Chain ON; PLL, ExtVCO/LO
input buffer and LO output buffer ON)
[0] B11: B counter value (bits B[10:0] in the B_COUNTER and A_COUNTER registers)
B_COUNTER
B counter register
7
6
5
4
3
2
1
0
B[10:3]
W
Address:
Type:
Reset:
Description:
0x01
W
0x00
Most significant bits of the B counter value
[7:0] B[10:3]: B counter value (bit B11 in the FUNCTIONAL_MODE register, bits B[2:0] in the
A_COUNTER register)
Doc ID 018355 Rev 5
39/67