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3.9
Microcontroller checksum
Verify the code revision first; different revisions have different checksum.
Issue the following command:
vr
Within 500 msec, expect a string similar to the following:
CBLT pppp (c)1998 Bose Corp.
S/N qqqqqq Chksum:0017B2E0
>
Note: That the revision number field ("pppp") will contain the microcontroller soft-
ware revision, which has already been checked; ignore this field. The serial
number field ("qqqqqq") is currently unused; ignore this field as well. The
hex number following the string "Checksum:" is the uC firmware checksum.
In this example, the checksum is "17B2E0" (ignore the leading zeroes)
3.9.1
uC Firmware Revision
3.10
DSP checksum
Perform a DSP checksum test ONLY if the microcontroller firmware revision (as deter-
mined in test 3.8) is Version 35 or higher.
Verify the code revision first, since the checksum will be different from revision to revision.
Issue the command:
tn 4,0,0,0,0,0,0,0,0
Within 500msec, expect the response
OK
>
Then issue the command:
dp 10,0,2,0,12
Within 500msec, expect a response similar to the following:
DSPke025E2C24
>
Framingham, MA 01701-9168
Microcontroller CheckSum
Loewe Part Number
35
350-90370.994
SIZE
FSCM
A
32108
Bose Part Number
261396
CLASS
DWG NO.
TS
264695
CheckSum (hex)
001E0406
SHEET
10 of 16
REV.
44
00
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