参数资料
型号: T89C51AC2-SLSIM
厂商: Atmel
文件页数: 66/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
标准包装: 27
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
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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