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4256B–USB–03/06

AT89C5132

Program

Configuration

Information

•

Parameter settings

•

Instruction: LCALL FFC0h.

Notes:

1. Unprogram BLJB so disable bootloader exection at reset.

2. Program BLJB so enable bootloader exection at reset.

3. Unprogram X2B so disable X2 mode at reset.

4. Program X2B so enable X2 mode at reset.

5. Refer to the AT89C5132 datasheet for information on Write operation Timing.

6. No special resources are used by the bootloader during these operations.

Erasing the Flash

The AT89C5132 Flash memory is divided into four blocks:

Block 0: from address 0000h to 1FFFh (64 pages)

Block 1: from address 2000h to 3FFFh (64 pages)

Block 2: from address 4000h to 7FFFh (128 pages)

Block 3: from address 8000h to FFFFh (256 pages)

•

Parameter settings

•

Instruction: LCALL FFC0h.

Note:

1. Refer to the AT89C5132 datasheet for information on Write operation Timing, then multiply this

timing by the number of pages.

2. No special resources are used by the bootloader during these operations.

Starting the

Bootloader

This routine allows to start at the beginning of the bootloader as after a reset. After calling this

routine the regular boot process is performed and the communication must be opened before

any action.

•

No special parameter setting

•

Set bit ENBOOT in AUXR1 register

•

instruction: LJUMP or LCALL at address F000h

API Name

api_command

api_dph

api_dpl

api_value

07h

–

–

(HSB & BFh) |

40h

07h

–

–

HSB & BFh

07h

–

–

(HSB & 7Fh) |

80h

07h

–

–

HSB & 7Fh

__api_wr_BSB

04h

–

00h

value to write

__api_wr_SBV

04h

–

01h

value to write

__api_wr_SSB

04h

–

05h

value to write

__api_wr_EB

04h

–

06h

value to write

API Name

api_command

api_dph

api_dpl

api_value

__api_erase_block0

00h

00h

–

–

__api_erase_block1

00h

20h

–

–

__api_erase_block2

00h

40h

–

–

__api_erase_block3

00h

80h

–

–