Reconfigurable bits – Sundance SMT911 User Manual
Page 27
SMT911 User Manual SMT911
Page 27 of 38
Last Edited: 01/06/2010 10:09:00
Bit
Default
Description
7
0
„1‟ = write to memory, „0‟ = stop write to memory
6
0
„1‟ = read from memory, „0‟ = don‟t read from memory
5
0
“000000” = standby
“111111” = active (actual working mode depends on register 0x02
4
0
3
0
2
0
1
0
0
0
By default, the gain control is applied through the parallel digital inputs of the
MAXIM chips. This register is used to set these digital inputs.
Byte 1-0
D15 D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reconfigurable bits:
Bit
Default
Description
13
0
Bit 13:Bit 7 are digital gain control of MAXIM B
As Receiver:
B13:B12 are used for Rx LNA gain control. 00”&“01” = minimum, “10” = medium, “11” = maximum.
B11:B7 are used for Rx VGA gain control. “00000” = 0 dB (minimum), “11111” = 62 dB (maximum).
As Transmitter
B13 is not used, B12:B7 is used for Tx VGA gain control. “000000” = 0 dB (minimum), “111111” =
30 dB (maximum)
12
0
11
0
10
0
9
0
8
0
7
0
6
0
Bit6:Bit0, are digital gain control for MAXIM A.
As Receiver:
B6:B5 are used for Rx LNA gain control. “00”&“01” = minimum, “10” = medium, “11” = maximum.
B4:B0 are used for Rx VGA gain control. “00000” = 0 dB (minimum), “11111” = 62 dB (maximum).
As Transmitter:
B6 is not used, B5:B0 is used for Tx VGA gain control. “000000” = 0 dB (minimum), “111111” = 30
dB (maximum)
5
0
4
0
3
0
2
0
1
0
0
0
Various internal blocks of the MAXIM chip can be turned on or off by setting this
standby register. Setting bit 13 to 1 turns the clock on, while setting it to 0 turns the
block off.
Byte 1-0
D15 D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0
0
0
1
0
0
0
0
0
0
0
0
0
1
1
1
Reconfigurable bits:
Bit
Default
Description
13
1
MIMO mode: „0‟ = normal operation, „1‟ = MIMO applications
11
0
Voltage Reference
10
0
PA Bias DAC, in TX Mode