TMP86C909XB Toshiba, TMP86C909XB Datasheet - Page 180

• Manufacturer Part Number: TMP86C909XB
• Description: EMULATION CHIP FOR TMP86F SDIP
• Manufacturer: Toshiba

Specifications of TMP86C909XB

• Accessory Type: Adapter
• For Use With/related Products: TMP86F SDIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

15.10.1Password String
15.10.2Handling of Password Error
15.10.3Password Management during Program Development
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.
Therefore, 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.
UART
Example
PNSA = F012H
PCSA = F107H
Password string = 01H,02H,03H,04H,05H
Example :Specify PNSA to F000H, and the password string to 8 bytes from address F001H
Password Section code abs = 0F000H
RXD pin
(PCSA becomes F001H.)
DB
DB
06H,07H,08H
Figure 15-5 Password Comparison
F0H 12H F1H 07H 01H 02H 03H 04H 05H 06H 07H 08H
PNSA
08H
“CODE1234”
PCSA
Page 169
F012H
F107H
F108H
F109H
F10AH
F10BH
F10CH
F10DH
F10EH
: PNSA definition
: Password string definition
Flash memory
08H
01H
02H
03H
04H
05H
06H
07H
08H
Password string
"08H" becomes
the umber of
passwords
8 bytes
Compare
TMP86F409NG