Datasheet > FX818D5

FX818D5

更新时间： 2024-02-19 22:57:58

品牌	Logo	应用领域
CMLMICRO		电信光电二极管电信集成电路
页数	文件大小	规格书
26页	672K
描述
CTCSS SIGNALLING PROCESSOR

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技术参数
数据手册

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FX818D5 技术参数

生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	SSOP,	针数：	24
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.84	JESD-30 代码：	R-PDSO-G24
长度：	8.2 mm	功能数量：	1
端子数量：	24	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	认证状态：	Not Qualified
座面最大高度：	1.99 mm	标称供电电压：	3.3 V
表面贴装：	YES	电信集成电路类型：	TELECOM CIRCUIT
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
宽度：	5.29 mm	Base Number Matches：	1

FX818D5 数据手册

CTCSS Signalling Processor

FX818

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

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

RESET

N/A

CTCSS

FAST

DETECT

ENABLE

$80

$82

SUB-AUDIO

CONTROL

DECODER

ENABLE

CTCSS DECODER BANDWIDTH

FAST CTCSS

MODE

SUB-AUDIO

SET-UP

MSB

BIT 3

LSB

DETECT/

PREDICTIVE

BIT 2

BIT 1

BIT 0

BPF

6dB

PAD

$88

$8B

$8E

GENERAL

CONTROL

BPF

TIMER

ENABLE

UN-MUTE

ENABLE

RE-CYCLE

GENERAL

PURPOSE

TIMER

GENERAL PURPOSE TIMER

MSB

BIT 7

LSB

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

GPT

IRQ

CTCSS

IRQ

CTCSS

FAST IRQ

MASK

IRQ

MASK

ã 1997 Consumer Microcircuits Limited

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