CTCSS Signalling Processor
FX818
16-bit Write Only Registers
HEX
ADDRESS/
COMMAND
REGISTER
NAME
BIT 7
(D7)
BIT 6
(D6)
BIT 5
(D5)
BIT 4
(D4)
BIT 3
(D3)
BIT 2
(D2)
BIT 1
(D1)
BIT 0
(D0)
CTCSS TX/
FAST RX
CTCSS TX / FAST RX FREQUENCY
$83
CTCSS (TX)
NOTONE
MSB
FREQUENCY (1)
0
0
BIT 12
BIT 11
BIT 10
BIT 9
BIT 8
CTCSS TX/
FAST RX
CTCSS TX / FAST RX FREQUENCY
LSB
FREQUENCY (2)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
CTCSS RX
PROGRAM
(1)
CTCSS TONE ADDRESS
CTCSS FREQUENCY
$84
$8A
MSB
BIT 3
LSB
MSB
BIT 2
BIT 6
0
BIT 1
BIT 5
BIT 0
BIT 11
BIT 10
BIT 9
BIT 1
BIT 1
BIT 1
BIT 8
CTCSS RX
PROGRAM
(2)
CTCSS FREQUENCY
LSB
BIT 7
BIT 4
BIT 3
BIT 3
BIT 3
BIT 2
BIT 0
AUDIO
CONTROL
(1)
MOD 1
MOD 1
MSB
BIT 4
LSB
0
0
ENABLE
BIT 2
BIT 0
AUDIO
CONTROL
(2)
MOD 2
MOD 2
MSB
BIT 4
LSB
0
ENABLE
BIT 2
BIT 0
Write Only Register Description
GENERAL RESET (Hex address $01)
The reset command has no data attached to it. It sets the device registers into the specific (all powersaved)
states as listed below:
REGISTER NAME
HEX
ADDRESS
$80
BIT 7
(D7)
0
0
0
0
BIT 6
(D6)
0
0
0
0
BIT 5
(D5)
0
0
0
0
BIT 4
(D4)
0
0
0
0
BIT 3
(D3)
0
X
0
BIT 2
(D2)
0
X
0
BIT 1
(D1)
0
X
0
BIT 0
D0)
0
X
0
SUB-AUDIO CONTROL
SUB-AUDIO STATUS
SUB-AUDIO SET-UP
CTCSS TX / FAST RX
FREQUENCY
CTCSS TX / FAST RX
FREQUENCY
$81
$82
$83
(1)
(2)
0
0
0
0
0
0
0
0
0
0
0
0
CTCSS RX PROGRAM
CTCSS RX PROGRAM
GENERAL CONTROL
AUDIO CONTROL
AUDIO CONTROL
GENERAL PURPOSE TIMER
IRQ MASK
(1)
(2)
$84
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
$88
$8A
(1)
(2)
$8B
$8E
$8F
IRQ FLAG
X = undefined
ã 1997 Consumer Microcircuits Limited
8
D/818/4
CMLMICRO [ CML MICROCIRCUITS ]
