TMP89FW24ADFG Datasheet, PDF (417/548 Pages) Toshiba Semiconductor – 8 Bit Microcontroller TLCS-870/C1 Series

TMP89FW24A
24. Flash Memory
The TMP89FW24A has flash memory of 126976 bytes. A write and erase operation to be performed on flash mem-
ory can be controlled in the following three modes:
- MCU mode
In MCU mode, the flash memory is accessesd by the CPU control, and the flash memory can be execu-
ted the erasing and writing without affecting the operation of a running application. Therefore, this mode
is used for software debugging and a firmware change after shipment of TMP89FW24A.
- Serial PROM mode
In serial PROM mode, the flash memory is accesed by the CPU control. Use of the serial interface
(UART and SIO) enables the flash memory to be controlled by the small number of pins. The
TMP89FW24A used in serial PROM mode supports on-board programming, which enables users to pro-
gram flash memory after the microcontroller is mounted on a user board.
- Parallel PROM mode
The Parallel PROM mode allows the flash memory to be accessed as a stand-alone flash memory by
the program writer provided by a third-party.High-speed access to the flash memory is available by control-
ling address and data signals directly. To receive a support serivice for the program writer, please ask a
Toshiba sales representative.
In MCU mode and serial PROM modes, flash memory control registers (FLSCR1 and FLSCR2) are used to con-
trol the flash memory. This chapter describes how to access the flash memory using the MCU mode and serial
PROM modes.
RA000
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2012/5/18