參數(shù)資料
型號: T89C51AC2-RLTIM
廠商: Atmel
文件頁數(shù): 66/121頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K 44VQFP
標(biāo)準(zhǔn)包裝: 160
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LQFP
包裝: 托盤
49
A/T89C51AC2
4127H–8051–02/08
Figure 26. Hardware Boot Process Algorithm
Application
Programming Interface
Several Application Program Interface (API) calls are available for use by an application
program to permit selective erasing and programming of Flash pages. All calls are made
by functions.
All of these APIs are described in detail in the following documents on the Atmel web
site.
Datasheet Bootloader UART A/T89C51AC2
XROW Bytes
Table 32. XROW Mapping
RESET
Hardware
condition?
BLJB = = 0
?
bit ENBOOT in AUXR1 register
is initialized with BLJB inverted.
H
a
rd
w
a
re
S
o
ft
w
a
re
ENBOOT = 1
PC = F800h
ENBOOT = 1
PC = F800h
FCON = 00h
FCON = F0h
Boot Loader
in FM1
ENBOOT = 0
PC = 0000h
Yes
No
Application
in FM0
(Example, if BLJB=0, ENBOOT is set (=1) during reset,
thus the bootloader is executed after the reset)
Description
Default Value
Address
Copy of the Manufacturer Code
58h
30h
Copy of the Device ID#1: Family code
D7h
31h
Copy of the Device ID#2: Memories size and type
F7h
60h
Copy of the Device ID#3: Name and Revision
FFh
61h
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