AT89S51 데이터 시트보기 (PDF) - Atmel Corporation

부품명

상세내역

제조사

AT89S51

8-bit Microcontroller with 4K Bytes In-System Programmable Flash

Atmel Corporation 

4.11 XTAL1

4.12 XTAL2

EA should be strapped to VCC for internal program executions.

This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming.

Input to the inverting oscillator amplifier and input to the internal clock operating circuit.

Output from the inverting oscillator amplifier

5. Special Function Registers

A map of the on-chip memory area called the Special Function Register (SFR) space is shown in

Table 5-1.

Note that not all of the addresses are occupied, and unoccupied addresses may not be imple-

mented on the chip. Read accesses to these addresses will in general return random data, and

write accesses will have an indeterminate effect.

6 AT89S51

2487D–MICRO–6/08

Share Link: