TMP89FS60 datasheet(25/410 Pages) TOSHIBA

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Page 11

TMP89FS60

RA001

Note: Bits 7 to 3 of SYSSR4 are read as "0".

2.2.1.2

BOOTROM

The BOOTROM is not mapped in the code area or the data area after reset release.

Note 1: When the BOOTROM is not mapped in the code area, an instruction is fetched from the Flash or an

SWI instruction is fetched, depending on the capacity of the internal Flash.

Note 2: Only the first 2 Kbytes of the BOOTROM are mapped in the memory map, except in the serial PROM

mode.

Note: The flash memory control register 1 has a double-buffer structure comprised of the register FLSCR1 and a shift register.

Writing "0xD5" to the register FLSCR2 allows a register setting to be reflected and take effect in the shift register. This

means that a register setting value does not take effect until "0xD5" is written to the register FLSCR2. The value of the shift

System control status register 4

SYSSR4

(0x0FDF)

76543

210

Bit Symbol

-----

RVCTRS

RAREAS

(RSTDIS)

Read/Write

RRRRRRRR

After reset

00000

000

RAREAS

Status of mapping of the RAM in the

code area

0 :

1 :

The enabled SYSCR3<RAREA> data is "0".

The enabled SYSCR3<RAREA> data is "1".

RVCTRS

Status of mapping of the vector

address in the area

0 :

1 :

The enabled SYSCR3<RVCTR> data is "0".

The enabled SYSCR3<RVCTR> data is "1".

Example: Program transfer (Transfer the program saved in the data area to the RAM.)

HL, TRANSFER_START_ADDRESS

; Destination RAM address

DE, PROGRAM_START_ADDRESS

; Source ROM address

BC, BYTE_OF_PROGRAM

; Number of bytes of the program to be executed -1

TRANS_RAM:

A, (DE)

; Reading the program to be transferred

(HL), A

; Writing the program to be transferred

INC

; Destination address increment

INC

; Source address increment

DEC

; Have all the programs been transferred?

JRS

F, TRANS_RAM

Setting FLSMD<BAREA> to "1" maps the BOOTROM to 0x1000 to 0x17FF in the code area and to

0x1000 to 0x17FF in the data area. The BOOTROM can be easily written into the Flash by using the Ap-

plication Programming Interface (API) integrated in the BOOTROM.

Flash memory control register 1

FLSCR1

(0x0FD0)

76543

210

Bit Symbol

(FLSMD)

BAREA

(FAREA)

(ROMSEL)

Read/Write

R/W

After reset

01000

000

BAREA

Specifies mapping of the

BOOTROM in the code and data

areas

0 :

1 :

The BOOTROM is not mapped to 0x1000 to 0x17FF in the code area and

to 0x1000 to 0x17FF in the data area.

The BOOTROM is mapped to 0x1000 to 0x17FF in the code area and to

0x1000 to 0x17FF in the data area.

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