November 16, 2006
6881094C31-E
3-4
Theory of Operation:
Transceiver Board
lists the connector pins, their signals, and functions. SPI refers to serial peripheral
interface, which is the control bus from the microprocessor. SSI is the serial synchronous interface
bus for data to and from the DSP. There is a RX SSI bus for demodulated data from the receiver and
a TX SSI bus for modulation data to the transmitter.
Table 3-2. VOCON Connector P1
Pin
No.
VOCON Signal
XCVR
Signal
XCVR
I/O
Type
Description
1
FUB+
O
dc
Fused B+ to VOCON
2
FUB+
O
dc
Fused B+ to VOCON
3
LOCK_DET*
LOCK
O
status
FGU lock detect
4
TX_SSI_DATA
TXTD
O
ssi
TX SSI data
5
SSI_CLK
RXCK
O
ssi
RX SSI clock
6
SSI_FSYNC
SSFS
O
ssi
RX SSI frame sync
7
16.8MHz
F168
O
RF
16.8 MHz reference clock
8
SW_B+
SWB+
I
dc
Switch control
9
TX_SSI_FSYNC
TXFS
I
ssi
TX SSI frame sync
10
TX_SSI_CLK
TXCK
I
ssi
TX SSI clock
11
GND
GND
12
RX_SSI_DATA
RXDO
O
ssi
RX SSI data
13
ABACUS3_CS
ABCS
I
ssi
SPI Abacus chip select
14
GND
GND
15
VSW1
VSW1
I
dc
Regulated 3.8 V
16
SPI_CLK_A
SPCK
I
spi
SPI clock
17
SPI_MISO_A
MISO
O
spi
SPI data out
18
EEPROM_SEL*
EECS
I
spi
SPI EEPROM chip select
19
TX_INHIBIT
TXINH
I
control
TX inhibit control for secure
20
GND
GND
21
BAT_STATUS
BSTAT
O
dc
Battery status
22
GND
GND
23
SPI_MOSI_A
MOSI
I/O
spi
SPI data I/O
24
UNI_CS
USEL
I
spi
SPI universal chip select
25
AD_CS
ADCS
I
spi
SPI ADC chip select
26
POR*
RSTL
I/O
control
asynchronous reset, active low
Summary of Contents for ASTRO XTS-5000
Page 7: ...vi Table of Contents November 16 2006 6881094C31 E Notes ...
Page 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
Page 17: ...November 16 2006 6881094C31 E xvi CommercialWarranty Notes ...
Page 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
Page 83: ...November 16 2006 6881094C31 E 3 44 Theory of Operation Encryption Module ...
Page 135: ...November 16 2006 6881094C31 E 5 44 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 175: ...November 16 2006 6881094C31 E 7 32 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 367: ...November 16 2006 6881094C31 E Glossary 10 Notes ...
Page 373: ...Index 6 November 16 2006 6881094C31 E Notes ...