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| HD6433937 Datasheet, PDF (384/521 Pages) Hitachi Semiconductor – Hardware Manual | |||
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x: Unused bits. The value of these bits is not guaranteed.
12.4.8 Part ID Packet
The Part ID Packet is sent by the FLEX decoder whenever the FLEX decoder is disabled due to
the checksum feature. See 12.3.1, Checksum Packet for a description of the checksum feature.
Since the FLEX decoder is disabled after reset, this is the first packet that will be received by the
host after reset. The ID of the Part ID Packet is 255 (decimal).
Table 12-29 Part ID Packet Bit Assignments
Byte 3
Byte 2
Byte 1
Byte 0
Bit 7
1
MDL 1
CID 7
REV 7
Bit 6
1
MDL0
CID 6
REV 6
Bit 5
1
CID 13
CID 5
REV 5
Bit 4
1
CID 12
CID4
REV 4
Bit 3
1
CID 11
CID 3
REV 3
Bit 2
1
CID 10
CID 2
REV 2
Bit 1
1
CID 9
CID 1
REV 1
Bit 0
1
CID 8
CID 0
REV 0
MDL: Model. This identifies the FLEX decoder model. Current value is 0.
CID: Compatibility ID. This value describes the FLEX decoders to which this part is backwards
compatible. See table below for meaning and current value.
Bit
Indicates this IC can be used in place of Value for FLEXTM Roaming Decoder II
CID0
CID1
FLEX Alphanumeric Decoder I*1
FLEX Roaming Decoder I*2
1 (TRUE)
1 (TRUE)
CID2 FLEX Numeric Decoder
0 (FALSE)
Notes: 1. Compatibility to FLEX Alphanumeric Decoder II is indicated by MDL set to 0, CID 0 set
to 1, and REV greater than or equal to 7.
2. Compatibility to FLEX Roaming Decoder II is indicated by MDL set to 0, CID 1 set to 1,
and REV greater than or equal to 8.
REV: Revision. This identifies the revision and manufacturer of the FLEX decoder. The
following table lists the currently available part IDâs of the FLEX decoder family.
372
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