CMX838 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX838' PDF : 71 Pages View PDF
FRS/PMR446/GMRS Family Radio Processor
CMX838
5.1.1 8-Bit C-BUS Register Map
8 BIT REGISTER
NAME
GENERAL RESET
[Write $01]
SETUP REGISTER
[Write $80]
AUDIO CONTROL
[Write $81]
RX VOLUME
CONTROL
[Write $82]
AUDIO POWER AND
BW CONTROL
[WRITE $83]
SYNTHESIZER
BASEBAND CLK
CONTROL
[Write $89]
SYNTHESIZER
GENERAL
CONTROL
[Write $8A]
SYNTHESIZER
CHANNEL SEL
[Write $8B]
SYNTHESIZER
STATUS
[Read $8C]
TEST 0
[WRITE $90]
TONE SIGNALING
CONTROL
[Write $93]
SUBAUDIO STATUS
[Read $94]
[SAS]
8 BIT SUBAUDIO
TASK DATA
[Write $95]
8 BIT SUBAUDIO
TEST DATA
[Write $96]
BIT 7
BIT 6
BIT 5
BIT 4 BIT 3
BIT 2
BIT 1
BIT 0
N/A
TX
enable
Input 1 control
Audio Path Control
Input 2 control
Output control
Audio Filter bypass control
Pre-emphasis Low-pass
bypass control
High-
pass
bypass
control
AUDIO LEVEL
+/- 7.5dB in 0.5dB steps
UNUSED
Limiter & Limiter Filter
& De-emphasis bypass control
VOLUME CONTROL
+12 to –33dB in 1.5dB steps
POWER CONTROL
FOR MOD 1 & 2 AND
MICAMP
SYNTHESIZER &
BASEBAND CLOCK
SOURCE SELECT
ENABLE,
POWERSAVE,
&
TEST MODE CONTROL
RESERVED SET TO "0"
POWER
CONTROL FOR
AUDIO FILTERS
AND LIMITER
POWER
CONTROL FOR
VOLUME
CONTROL
AUDIO
BAND-
WIDTH
SEL
UNUSED
SYNTHESIZER
REFERENCE INPUT FREQUENCY
SELECT
XTAL/CLOCK
INPUT
FREQUENCY
SELECT
LOCK DETECTOR
CONTROL
&
IRQ MASK
CHARGE PUMP
CURRENT
HIGH
LOW
polarity
RF SYSTEM
FRS, GMRS, PMR
446, or GENERIC
LOCK DETECT
WINDOW
20 to 80ns
CHANNEL SELECTION
INDEXED CONTROL OF VALID FRS,
GMRS & PMR446 RF CHANNELS
IN GENERIC RF SYSTEM MODE
(set in [SGC])
SYNTHESIZED FREQUENCY IS SET VIA
THESE BITS AND BITS IN [SBCC] &
[SIFOS] REGISTERS
Lock
Algorithm
Status
LOCK STATUS OF MOST RECENT 7 PHASE COMPARISONS
POWER CONTROL
FOR SUBAUDIO
SYNTHESIZER
IRQ
FLAG
Decode
SYNTHESIZER TEST MODES
SUBAUDIO
IRQ
CONTROL
SUBAUDIO TASK SELECTION
Decoded Tone Index
SUBAUDIO TASK DATA BYTE
SUBAUDIO TEST DATA BYTE
Table 4: 8 Bit Registers
2003 CML Microsystems Plc
29
D/838/8
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