CMX813E4 データシートの表示（PDF） - MX-COM Inc
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CMX813E4 Datasheet PDF : 19 Pages
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CMX813 Multi-Standard Analog Paging Decoder
7
CMX813 Advance Information
Bit 5 Bit 4 Bit 3 Bit 2
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
BANDWIDTH
Nominal Decode
±0.1%
±0.3%
±0.5%
±0.7%
±0.9%
±1.1%
±1.3%
±1.5%
±1.7%
±1.9%
±2.1%
±2.3%
±2.5%
±2.7%
±2.9%
±3.1%
Table 4: DECODER BANDWIDTH (Bits 5,4,3,and 2)
Bit 1
0
0
1
1
Bit 0
0
1
0
1
OPERATION MODE
Zero Power
Clear RAM, all RAM contents and RAM FULL bit of the STATUS Register
are reset to 0.
Normal operation, decode enabled
Reserved
Table 5: OPERATION MODE (Bits 1 and 0)
5.1.2.3 TONE ADDRESS Register (Hex address $31)
This register is used to load ROM addresses to the internal RAM for decode as described below:
TONE ADDRESS
(Bits 7, 6, 5, 4, 3, 2, 1,
and 0)
The parameters (center frequency) for decoding each tone in the tone table are
stored in a decoding ROM, and any one of these tones can be selected for
decoding via this 8-bit ROM address. The tones table and address allocations
are listed in the Application Notes, Section 6.
For a 1-tone or 2-tone system, up to eight ROM addresses can be loaded to the
RAM for decode from a chosen ROM page. A FIFO system is used for loading
the RAM memory. If more than 8 ROM addresses were loaded to the RAM,
only the last 8 entries will be stored.
For the 5/6 tone and HSC tone system, Bits 7, 6, 5, and 4 are used to select a
specific tone set (CCIR/ZVEI etc.) for decode. The decode algorithm will search
automatically through the sixteen ROM addresses associated with the chosen
tone set.
Bits 3, 2, 1, and 0 are not used and should be set to 0.
¤2000 MX-COM, Inc.
www.mxcom.com tel: 336 744 5050 800 638 5577 fax: 336 744 5054
Doc. # 20480220.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201, USA All trademarks and service marks are held by their respective customers.
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