參數(shù)資料
型號: AT89C51IC2-RLRIL
廠商: Atmel
文件頁數(shù): 35/140頁
文件大?。?/td> 0K
描述: IC MCU FLASH 8051 32K 3V 44-VQFP
標(biāo)準(zhǔn)包裝: 1
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,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
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LQFP
包裝: 剪切帶 (CT)
產(chǎn)品目錄頁面: 616 (CN2011-ZH PDF)
其它名稱: AT89C51IC2RLRILCT
13
AT89C51IC2
4301D–8051–02/08
SDA is the bidirectional 2-wire data line
RST
10
4
I/O
Reset: A high on this pin for two machine cycles while the oscillator is running, resets
the device. An internal diffused resistor to V
SS permits a power-on reset using only an
external capacitor to VCC. This pin is an output when the hardware watchdog forces a
system reset.
ALE/PROG
33
27
O (I)
Address Latch Enable/Program Pulse: Output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE is emitted at a
constant rate of 1/6 (1/3 in X2 mode) the oscillator frequency, and can be used for
external timing or clocking. Note that one ALE pulse is skipped during each access to
external data memory. This pin is also the program pulse input (PROG) during Flash
programming. ALE can be disabled by setting SFR’s AUXR.0 bit. With this bit set, ALE
will be inactive during internal fetches.
PSEN
32
26
O
Program Strobe ENable: The read strobe to external program memory. When execut-
ing code from the external program memory, PSEN is activated twice each machine
cycle, except that two PSEN activations are skipped during each access to external
data memory. PSEN is not activated during fetches from internal program memory.
EA
35
29
I
External Access Enable: EA must be externally held low to enable the device to fetch
code from external program memory locations 0000H to FFFFH (RD). If security level 1
is programmed, EA will be internally latched on Reset.
Table 13. Pin Description for 40/44 Pin Packages (Continued)
Mnemonic
Pin Number
Type
Name and Function
PLCC44
VQFP44 1.4
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AT89C51IC2-RLTIM 制造商:Atmel Corporation 功能描述:MCU 8-bit AT89 8051 CISC 32KB Flash 3.3V/5V 44-Pin VQFP Tray