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20. Serial PROM Mode
20.6 Operation Mode
TMP86FS64FG
20.6.7 Flash Memory Read Protection Setting Mode (Operation Command: FAH)
Table 20-13 shows Flash memory read protection setting 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 ErrorNote 3: If the read protection is enabled for a blank product or a password error occurs for a non-blank product, TMP86FS64FG
stops UART communication and enters the halt mode. In this case, initialize TMP86FS64FG by the RESET pin and reacti-
vate the serial PROM mode.
Note 4: If an error occurs during reception of a password address or a password string, TMP86FS64FG stops UART communica-
tion and enters the halt mode. In this case, initialize TMP86FS64FG by the RESET pin and reactivate the serial PROM
mode.
Description of the Flash memory read protection setting 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 command data in the flash memory status output mode
(FAH).
3. When the 5th byte of the received data contains the operation command data shown in Table 1-6, the
device echoes back the value which is the same data in the 6th byte position of the received data (in
Table 20-13 Flash Memory Read Protection Setting Mode Process
Transfer Bytes
Transfer Data from External Con-
troller to TMP86FS64FG
Baud Rate
Transfer Data from TMP86FS64FG to Exter-
nal Controller
BOOT
ROM
1st byte
2nd byte
Matching data (5AH)
-
9600 bps
- (Automatic baud rate adjustment)
OK: Echo back data (5AH)
Error: Nothing transmitted
3rd byte
4th byte
Baud rate modification data
-
9600 bps
-
OK: Echo back data
Error: A1H
× 3, A3H × 3, 62H × 3 (Note 1)
5th byte
6th byte
Operation command data (FAH)
-
Modified baud rate
-
OK: Echo back data (FAH)
Error: A1H
× 3, A3H × 3, 63H × 3 (Note 1)
7th byte
8th byte
Password count storage address
15 to 08 (Note 2)
Modified baud rate
-
OK: Nothing transmitted
Error: Nothing transmitted
9th byte
10th byte
Password count storage address
07 to 00 (Note 2)
Modified baud rate
-
OK: Nothing transmitted
Error: Nothing transmitted
11th byte
12th byte
Password comparison start
address 15 to 08 (Note 2)
Modified baud rate
-
OK: Nothing transmitted
Error: Nothing transmitted
13th byte
14th byte
Password comparison start
address 07 to 00 (Note 2)
Modified baud rate
-
OK: Nothing transmitted
Error: Nothing transmitted
15th byte
:
m’th byte
Password string (Note 2)
-
Modified baud rate
-
OK: Nothing transmitted
Error: Nothing transmitted
n’th byte
-
Modified baud rate
OK: FBH (Note 3)
Error: Nothing transmitted
n’+1th byte
(Wait for the next operation com-
mand data)
Modified baud rate
-