TMP86C993XB Toshiba, TMP86C993XB Datasheet - Page 222
TMP86C993XB
Manufacturer Part Number
TMP86C993XB
Description
EMULATION CHIP FOR TMP86F SSOP
Manufacturer
Toshiba
Datasheet
1.TMP86C993XB.pdf
(246 pages)
Specifications of TMP86C993XB
Accessory Type
Adapter
For Use With/related Products
TMP86F SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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19.10
Passwords
Example :Specify PNSA to F000H, and the password string to 8 bytes from address F001H
19.10.1
19.10.2
19.10.3
(PCSA becomes F001H.)
Password Section code abs = 0F000H
memory. When the password string is not matched to the data in the flash memory, the device enters the halt
condition due to the password error.
serial PROM mode.
fore, it is recommended to use a fixed password in the program development stage.
The password string transmitted from the external controller is compared with the specified data in the flash
If a password error occurs, the device enters the halt condition. In this case, reset the device to reactivate the
If a program is modified many times in the development stage, confusion may arise as to the password. There-
Password String
Handling of Password Error
Password Management during Program Development
UART
Example
PNSA = F012H
PCSA = F107H
Password string = 01H,02H,03H,04H,05H
DB
DB
08H
“CODE1234”
RXD pin
06H,07H,08H
Figure 19-5 Password Comparison
: PNSA definition
: Password string definition
F0H 12H F1H 07H 01H 02H 03H 04H 05H 06H 07H 08H
PNSA
PCSA
Page 208
F012H
F107H
F108H
F109H
F10AH
F10BH
F10CH
F10DH
F10EH
Flash memory
08H
01H
02H
03H
04H
05H
06H
07H
08H
Password string
"08H" becomes
the umber of
passwords
8 bytes
Compare
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