AT48802 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT48802' PDF : 23 Pages View PDF
AT48802
Register Functions (Continued)
Function
Register
Bit #
TR SW 0, 1
9
4-5
Soft Reset
9
6
TDD Rate Select
9
7
TX PN Mask
A
0-7
RX PN Mask
B
0-7
RSSI Delay
C
0-5
RSSI ID
C
6-7
0-1
RSSI Width
D
0-4
AUD TH Delay
E
0-5
AUD TH 0-1
E
6-7
AUD TH Width
F
0-4
Description
Intended to control the transmit-receive switch in the RF
module.
TR SW 0
TR SW 1
TR SWITCH
pin 19
0
0
0
0
1
TDD
1
0
!TDD
1
1
1
Not a user control.
See Section 2.11, 1 = 1875 Hz, 0 = 7500 Hz.
These set the length of the PN code. Function is the
same for transmit and receive.
Shift Register Size Code Length
Mask
R13
8192
FF
R12
4096
7F
R11
2048
3F
R10
1024
1F
R9
512
0F
R8
256
07
R7
128
03
R6
64
01
RSSI ID pin 63 delay with respect to internal TDD
positive edge. 1 LSB = 2.1 µs or 32MCLK. Bit 0 = LSB.
Range is TDD/2. The range is increased to TDD by
inverting the signal using RSSI I/D bits 6 and 7 (see
below).
Used in conjunction with RSSI Delay.
RSSI ID
RSSI ID
RSSI ID pin 63
0
0
0
0
1
TDD, delayed
1
0
!TDD, delayed
1
1
1
Intended to be used with an integrate and dump filter;
See Section 2.6.
Used in conjunction with RSSI Delay.
1 LSB = 2.1µs or 32MCLK. Bit 0 = LSB.
Same functionality as RSSI above except applies to the
AUD TH signal at pin 15. See section 2.8.3.
(continued)
2-17
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