tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 339

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA002
22. Serial PROM Mode
22.1 Outline
22.2 Security
available in serial PROM mode. The serial PROM mode is controlled by RXD0/SI0 pins, TXD0/SO0 pins, MODE
pin, and
party: password and security program functions. For more security-related information, refer to "22.12 Security".
The TMP89FM42 has a 4K-byte BOOTROM (Mask ROM) for programming to flash memory. BOOTROM is
In serial PROM mode, two security functions are provided to prevent illegal memory access attempts by a third
RESET
Table 22-1 Operating Range in Serial PROM Mode
Power supply voltage
High frequency
pin. In serial PROM mode, communication is performed via the UART or SIO.
Parameter
Min
4.5
1
Page 325
Max
5.5
10
MHz
Unit
V
TMP89FM42