SA2400A Datasheet, PDF (23/34 Pages) NXP Semiconductors – Single chip transceiver for 2.45 GHz ISM band

Philips Semiconductors
Single chip transceiver for 2.45 GHz ISM band
Product data
SA2400A
Table 20. Address 06: Manual receiver control settings
Bit
23
22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name ahsn osQ
rxosQval
osI
rxosIval
ten Corner f
Receiver gain
Default 0
0 ±(0) val (000)
0 ±(0)
val (000)
1 0 0 1111111111
Bit #
0–9
Name
receiver gain
10–11 corner freq.
12
ten
13–22 Rx offset I,Q
13–16
17
18–21
22
23
rxosIval
rxosIon
rxosQval
rxosQon
ahsn
Description
Write: In RXMGC mode, this sets the receiver gain.
Read: In other modes, the AGC controlled gain is available for readout here.
Bit positions: 0–plus1dB; 1–vga2dB; 2–vga4dB; 3–vga8dB; 4–vga16dB; 5–vga10dB; 6–filter6dB2; 7–filter10dB;
8–filter6dB1; 9–lna16dB
DC offset cancellation cornerpoint select.
Write: In RXMGC mode, this sets the cornerpoint.
Read: In other modes, the cornerpoint as controlled by the AGC is available for readout here.
Code: 00–10 kHz, 01–100 kHz, 10–1 MHz, 11–10 MHz
Use 10 MHz offset cancellation cornerpoint for brief period after each gain change
Receiver output driver manual offset adjustment. Code: {rxosXon,rxosXval} = ‘0xxxx’ → offset = 0;
{rxosXon,rxosXval} = ‘10000’ → offset = 8 mV; {rxosXon,rxosXval} = ‘11000’ → offset = –8 mV;
{rxosXon,rxosXval} = ‘10001’ → offset = 16 mV etc.
Rx offset correction, I channel, value (sign plus three bits)
Rx offset correction, I channel, ON
Rx offset correction, Q channel, value (sign plus three bits)
Rx offset correction, Q channel, ON
AGC with high Signal-to-Noise (switch LNA at step 52 instead of step 60).
Recommended to set to ‘1’.
Table 21. Address 07: Transmitter settings
Bit
23 22 21 20 19 18 17 16 15 14 13 12 11 10
Name
‘0000’
osQ
TxosQval
osI
txosIval
Default 0 0 0 0
0 ±(0)
val (000)
0 ±(0)
val (000)
98
txramp
00
7654
Tx gain hi
0 dB (0000)
3210
Tx gain low
15 dB (1111)
Bit #
0–3
4–7
8–9
10–19
Name
Tx gain low
Tx gain hi
txramp
Tx offset I, Q
10–13
14
15–18
19
txosIval
txosIon
txsoQval
txosQon
Description
Transmitter gain settings for TXLO output
Transmitter gain settings for TXHI output
Tx ramp-up delay programming: 00–1 µs, 01–2 µs, 10–3 µs, 11–4 µs. Ramp-up time always 1 µs.
Tx carrier leakage calibration:
Write: with test mode, these bits set the offset.
Read: in normal mode, automatically controlled settings can be read out here (sign plus three bits).
Code: {txosXon,txosXval} = ‘0xxxx’ → offset = 0; {txosXon,txosXval} = ‘10000’ → offset = 2.5 µA;
{txosXon,txosXval} = ‘11000’ → offset = –2.5 µA; {txosXon,txosXval} = ‘10001’ → offset = 5.0 µA etc.
Tx offset correction, I channel, value (sign plus three bits)
Tx offset correction, I channel ON
Tx offset correction, Q channel, value (sign plus three bits)
Tx offset correction, Q channel ON
Table 22. Address 08: VCO settings
Bit
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
name
these bits do not exist on IC
not used ‘0’ ‘0’ vcerr
vcoband
default x x x x x x x x x x x x x x 0 0 0 0 0 0 0 0 0 0
Bit #
0–3
Name
vcoband
4
vcerr
Description
VCO band.
Write: with test mode, these bits set the VCO band.
Read: in normal mode, the result ot the calibration (VCOCAL) can be read out here (0000 = highest frequencies).
VCO calibration error flag (no band with low enough frequency could be found).
2002 Nov 04
23