T83C5121 datasheet(63/110 Pages) ATMEL

tên linh kiện	T83C5121

Giải thích chi tiết về linh kiện	8-bit Microcontroller with Multi protocol SMART Card Interface

PDF	110 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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63 / 110 page

T8xC5121

4164E–SCR–02/04

Bootloader Functional

Diagram

As described in Section “ROM Configuration Byte”, page 58a ROM bit BLJRB (Boot

Loader Jump ROM Bit) defines which product version is. The Bootloader program is

mapped in ROM space from address C000h up to FFFFh and the entry point is located

at address F800h.

Figure 26. Bootloader Flowchart

ACK?

E2PROM at 00

ACK?

E2PROM at 01

Error: No TWI or serial device detected

U Character

received on UART

Serial communication is detected thanks to

Time Elapsed

Internal E2PROM (at 00) is detected

Bootloader

Execution

RESET

ROM program

Execution

BLJRB = 1

ROM Bit

ROM

RAM+ROM

RAM+ROM (Pre-prod: Application Program)

F800h

versions:

ROM

0000h

External E2PROM (at 01) is detected

(Prod)

RAM,ROM,EEPROM

A serial code is sent on RD pin (P3.7)

Versions:

SSB & P3.7 test

TWI

ext.bypassed?

bypassed?

SSB & P3.6 test

UART bypassed

bypassed?

Program is downloaded from

External EEPROM into internal

An ISP Software can be used from

a PC to program the part.

Atmel FLIP software is available

Program is downloaded from

internal EEPROM in CRAM and

executed

EEPROM and CRAM

and executed.

RD port = Error code =

22h

Autobaud feature (Table52)

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