tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 332

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA006
21. Flash Memory
controlled in the following three modes:
flash memory. This chapter describes how to access the flash memory using the MCU and serial PROM modes.
The TMP89FM42A has flash memory of 32768 bytes. A write and erase to be performed on flash memory can be
In MCU and serial PROM modes, flash memory control registers (FLSCR1 and FLSCR2) are used to control the
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MCU mode
the erasing and writing without affecting the operations of a running application. Therefore, this mode is
used for software debugging and firmware change after shipment of the TMP89FM42A.
Serial PROM mode
and SIO) enables the flash memory to be controlled by the small number of pins. The TMP89FM42A used
in serial PROM mode supports on-board programming, which enables users to program flash memory after
the microcontroller is mounted on a user board.
Parallel PROM mode
program writer provided by a third party. High-speed access to the flash memory is available by controlling
address and data signals directly. To receive a support service for the program writer, please ask a Toshiba
sales representative.
In MCU mode, the flash memory is accessed by the CPU control, and the flash memory can be executed
In serial PROM mode, the flash memory is accessed by the CPU control. Use of the serial interface (UART
The parallel PROM mode allows the flash memory to be accessed as a stand-alone flash memory by the
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