AT89C51RC2-3CSIM datasheet(12/127 Pages) ATMEL

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AT89C51RC2-3CSIM 데이터시트(PDF) 12 Page - ATMEL Corporation

부품명	AT89C51RC2-3CSIM

상세설명	Microcontroller with 16K/32K Bytes Flash

PDF	127 Pages

Scroll/Zoom	100%

제조업체	ATMEL [ATMEL Corporation]

홈페이지	http://www.atmel.com

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12 / 127 page

AT89C51RB2/RC2

4180C–8051–12/03

PSEN

Program Strobe Enable: The read strobe to external program memory. When

executing 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.

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 12. Pin Description for 40 - 44 Pin Packages (Continued)

Mnemonic

Pin Number

Type

Name and Function

DIL

LCC

VQFP44 1.4

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