參數(shù)資料
型號(hào): T89C51AC2-SLSIM
廠商: Atmel
文件頁數(shù): 61/121頁
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
標(biāo)準(zhǔn)包裝: 27
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(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)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-LCC(J 形引線)
包裝: 管件
44
A/T89C51AC2
4127H–8051–02/08
Operation Cross Memory Access
Space addressable in read and write are:
RAM
ERAM (Expanded RAM access by movx)
XRAM (eXternal RAM)
EEPROM DATA
FM0 (user flash)
Hardware byte
XROW
Boot Flash
Flash Column latch
The table below provide the different kind of memory which can be accessed from differ-
ent code location.
Note:
1. RWW: Read While Write
Table 27. Cross Memory Access
Action
RAM
XRAM
ERAM
Boot FLASH
FM0
E Data
Hardware
Byte
XROW
boot FLASH
Read
OK
-
Write
-
OK(1)
FM0
Read
OK
-
Write
-
OK (idle)
OK(1)
-
OK
External
memory
EA = 0
or Code Roll
Over
Read
-
OK
-
Write
-
OK(1)
-
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