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SM8213 Datasheet(PDF) 28 Page - Nippon Precision Circuits Inc

Part # SM8213
Description  POCSAG Decoder For Multiframe Pagers
PDF  33 Pages
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8213 Datasheet(HTML) 28 Page - Nippon Precision Circuits Inc

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SM8213AM
NIPPON PRECISION CIRCUITS—28
Read Command Set Flags/Data
Read command bits 1 to 16
These bits form the decoder read command.
Bits 1 to 8 form the actual command, and bits 9 to 16
are dummy data. While command bits 1 to 8 are
being set, data may be output on SDO and can be
treated as indeterminate data and ignored. While bits
9 to 16 are being set, however, data output on SDO is
valid data.
Internal status bit 1 (read command bit 9)
Internal status output data leading bit.
This bit is always 0.
Internal status bit 2 (read command bit 10)
AREA pin condition flag (when reading internal sta-
tus data).
When 0, AREA is LOW.
When 1, AREA is HIGH.
Internal status bit 3 (read command bit 11)
Decoder status flag.
When 1, decoder is operating in idle mode.
Internal status bit 4 (read command bit 12)
Decoder status flag.
When 1, decoder is operating in preamble mode.
Internal status bit 5 (read command bit 13)
Decoder status flag.
When 1, decoder is operating in lock mode.
Internal status bit 6 (read command bit 14)
Decoder status flag.
When 1, decoder is operating in write mode.
Internal status bit 7 (read command bit 15)
Decoder status flag.
When 1, decoder is receiving self address or mes-
sage.
Internal status bit 8 (read command bit 16)
Decoder status flag.
When 1, indicates data write operation to the decoder
internal RAM (BUSY in write mode).
Do not write data when this flag is set to 1.
After each 32-bit data is written, READY confirma-
tion is not required before writing subsequent data if
a space of 28.4 ms maximum is provided.
Table 9. Read command format/internal status data
Bit
READ command
Bit
Internal status1
11
1
0
20
2
AREA
30
3
IDLE MODE
40
4
PREAMBLE MODE
50
5
LOCK MODE
60
6
WRITE MODE
70
7
ADET+MDET (Receiving)
81
8
BUSY/ READY
9090
10
0
10
AREA
11
0
11
IDLE MODE
12
0
12
PREAMBLE MODE
13
0
13
LOCK MODE
14
0
14
WRITE MODE
15
0
15
ADET+MDET (Receiving)
16
0
16
BUSY/ READY
1.
= indeterminate data,
= determinate data



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