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參數(shù)資料
| 型號(hào)： | FX818 |
| 元件分類： | Codec |
| 英文描述： | CTCSS Super Codec |
| 中文描述： | 超級(jí)亞音頻編解碼器 |
| 文件頁數(shù)： | 7/26頁 |
| 文件大小： | 676K |
| 代理商： | FX818 |
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CTCSS Signalling Processor
FX818
1997
Consumer Microcircuits Limited
7
D/818/4
1.5
General Description
The FX818 is a programmable CTCSS sub-audio encoder/decoder for use in land mobile radio equipment, see
Figure 1.
The receiver section of the FX818 has a fast/predictive tone detector which operates in parallel with a tone
decoder. The latter decodes a user-programmable set of up to 15 tones and performs a more accurate (but
slower) analysis of the tones detected by the fast/predictive tone detector, which is a single detector that is
switchable to provide either a fast response to any CTCSS tone (FAST DETECT mode) or a fast response to a
single user-programmed CTCSS tone (PREDICTIVE mode).
The high pass audio filter is designed to filter out the CTCSS sub-audio tones. The summing and modulation
amplifiers allow the audio modulation to be controlled digitally via the C-BUS. A general purpose timer is
included.
Each function, and the routing of signals, is flexible and may be configured or controlled by the user's software.
1.5.1
Software Description
Address/Commands
Instructions and data are transferred, via "C-BUS", in accordance with the timing information given in
Figure 4.
Instruction and data transactions to and from the FX818 consist of an Address/Command (A/C) byte
followed by either:
(i)
(ii)
a further instruction or data (1 or 2 bytes) or
a status or Rx data reply (1 byte)
8-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)
$01
GENERAL
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
RESET
CTCSS
$80
SUB-AUDIO
CONTROL
TX
DECODER
ENABLE
FAST
DETECT
ENABLE
ENABLE
0
0
0
0
0
CTCSS DECODER BANDWIDTH
FAST CTCSS
MODE
$82
SUB-AUDIO
MSB
LSB
SET-UP
BIT 3
BIT 2
BIT 1
BIT 0
DETECT/
PREDICTIVE
0
0
0
BPF
$88
GENERAL
BPF
B
PF
6dB
TIMER
TIMER
CONTROL
ENABLE
UN-MUTE
PAD
0
0
0
ENABLE
RE-CYCLE
GENERAL
GENERAL PURPOSE TIMER
$8B
PURPOSE
MSB
LSB
TIMER
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
GPT
CTCSS
CTCSS
$8E
IRQ
IRQ
IRQ
FAST IRQ
MASK
0
MASK
0
0
MASK
MASK
0
0
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| FX836DW | Telecommunication IC |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FX818D2 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:CTCSS SIGNALLING PROCESSOR |
| FX826 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS/TACS System Audio Processor |
| FX826DW | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS / TACS SYSTEM AUDIO PROCESSOR |
| FX826J | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:AMPS/TACS System Audio Processor |
| FX828 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:CTCSS/DCS/SELCALL Processor |
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