TMP86FS23UG datasheet(197/252 Pages) TOSHIBA

197 / 252 page

Page 185

TMP86FS23UG

18. Flash Memory

TMP86FS23UG has 61440byte flash memory (address: 1000H to FFFFH). The write and erase operations to the

flash memory are controlled in the following three types of mode.

- MCU mode

The flash memory is accessed by the CPU control in the MCU mode. This mode is used for software

bug correction and firmware change after shipment of the device since the write operation to the flash

memory is available by retaining the application behavior.

- Serial PROM mode

The flash memory is accessed by the CPU control in the serial PROM mode. Use of the serial interface

(UART) enables the flash memory to be controlled by the small number of pins. TMP86FS23UG in the

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

The parallel PROM mode allows the flash memory to be accessed as a stand-alone flash memory by the

program writer provided by the third party. High-speed access to the flash memory is available by control-

ling address and data signals directly. For the support of the program writer, please ask Toshiba sales rep-

resentative.

In the MCU and serial PROM modes, the flash memory control register (FLSCR) is used for flash memory con-

trol. This chapter describes how to access the flash memory using the flash memory control register (FLSCR) in the

MCU and serial PROM modes.

TMP86FS23UG Datasheet(PDF) 197 Page - Toshiba Semiconductor