Philips CEM2100/00, Service Manual

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Page 251
T
5CL8
20.6.6 Flash Memory Status Output Mode (Operation Command: C3H)
Table 20-12 shows Flash memory status output mode process.
Note 1: “xxH
×
3” indicates that the device enters the halt condition after sending 3 bytes of xxH. For details, refer to " 20.7 Error
Code ".
Note 2: For the details on status code 1, refer to " 20.12 Flash Memory Status Code ".
Description of Flash memory status output mode
1. The 1st through 4th bytes of the transmitted and received data contain the same data as in the Flash
memory writing mode.
2. The 5th byte of the received data contains the flash memory status output mode command data
(C3H).
3. When the 5th byte contains the operation command data shown in Table 20-6, the device echoes back
the value which is the same data in the 6th byte position of the received data (in this case, C3H). If the
5th byte does not contain the operation command data, the device enters the halt condition after send-
ing 3 bytes of operation command error code (63H).
4. The 9th through 13th bytes contain the status code. For details on the status code, refer to " 20.12
Flash Memory Status Code ".
5. After sending the status code, the device waits for the next operation command data.
Table 20-12 Flash Memory Status Output Mode Process
Transfer Bytes
Transfer Data from External Con-
troller to
T5CL8
Baud Rate
Transfer Data from
T5CL8
to
External Controller
BOOT
ROM
1st byte
2nd byte
Matching data (5AH)
-
9600 bps
9600 bps - (Automatic baud rate adjustment)
OK: Echo back data (5AH)
Error: Nothing transmitted
3rd byte
4th byte
Baud rate modification data
(See Table 20-4)
- 9600 bps
9600 bps
-
OK: Echo back data
Error: A1H
×
3, A3H
×
3, 62H
×
3 (Note 1)
5th byte
6th byte Operation command data (C3H)
- Modified baud rate
Modified baud rate -
OK: Echo back data (C3H)
Error: A1H
×
3, A3H
×
3, 63H
×
3 (Note 1)
7th byte Modified baud rate 3AH Start mark
8th byte Modified baud rate 04H Byte count
(from 9th to 12th byte)
9th byte Modified baud rate 00H
to
03H Status code 1
10th byte Modified baud rate 00H Reserved data
11th byte Modified baud rate 00H Reserved data
12th byte Modified baud rate 00H Reserved data
13th byte Modified baud rate Checksum 2’s complement for the sum of 9th
through 12th bytes
9th byte Checksum
00H: 00H
01H: FFH
02H: FEH
03H: FDH
14th byte (Wait for the next operation com-
mand data) Modified baud rate -