參數(shù)資料
型號: AT89C51RC2-SLSIM
廠商: Atmel
文件頁數(shù): 112/127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: 60MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
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
配用: AT89STK-11-ND - KIT STARTER FOR AT89C51RX2
85
AT89C51RB2/RC2
4180E–8051–10/06
Reduced EMI Mode
The ALE signal is used to demultiplex address and data buses on port 0 when used with
external program or data memory. Nevertheless, during internal code execution, ALE
signal is still generated. In order to reduce EMI, ALE signal can be disabled by setting
AO bit.
The AO bit is located in AUXR register at bit location 0.As soon as AO is set, ALE is no
longer output but remains active during MOVX and MOVC instructions and external
fetches. During ALE disabling, ALE pin is weakly pulled high.
Table 64. AUXR Register
AUXR - Auxiliary Register (8Eh)
7
6
5
432
10
DPU
-
M0
-
XRS1
XRS0
EXTRAM
AO
Bit
Number
Bit
Mnemonic
Description
7DPU
Disable Weak Pull-up
Cleared to activate the permanent weak pull up when latch data is logic 1
Set to disactive the weak pull-up.
6-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5M0
Pulse Length
Cleared to stretch MOVX control: the RD and the WR pulse length is 6 clock
periods (default).
Set to stretch MOVX control: the RD and the WR pulse length is 30 clock
periods.
4-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3XRS1
XRAM Size
XRS1
XRS0
XRAM size
0
256 Bytes (default)
0
1
512 Bytes
1
0
768 Bytes
1
1024 Bytes
2XRS0
1
EXTRAM
EXTRAM Bit
Cleared to access internal XRAM using movx @ Ri @ DPTR.
Set to access external memory.
Programmed by hardware after Power-up regarding Hardware Security Byte
(HSB), default setting, XRAM selected.
0AO
ALE Output Bit
Cleared, ALE is emitted at a constant rate of 1/6 the oscillator frequency (or 1/3 if
X2 mode is used). (default) Set, ALE is active only during a MOVX or MOVC
instruction is used.
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AT89C51RC-33AU 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 32K Bytes Flash
AT89C51RC-33JC 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT