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EM78P451S 데이터시트 PDF




ELAN Microelectronics에서 제조한 전자 부품 EM78P451S은 전자 산업 및 응용 분야에서
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부품번호 EM78P451S 기능
기능 8-Bit Microcontroller with OTP ROM
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EM78P451S 데이터시트, 핀배열, 회로
www.DataSheet4U.com
EM78P451S
8-Bit Microcontroller
with OTP ROM
Product
Specification
DOC. VERSION 1.0
ELAN MICROELECTRONICS CORP.
June 2004
www.DataSheet4U.com




EM78P451S pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
Contents
4.6.3 Programmed the related registers............................................................................... 30
4.7 RESET and Wake-up .................................................................................................31
4.8 Interrupt......................................................................................................................37
4.9 Oscillator ....................................................................................................................38
4.9.1 Oscillator Modes.......................................................................................................... 38
4.9.2 Crystal Oscillator/Ceramic Resonators (XTAL) ........................................................... 38
4.9.3 RC Oscillator Mode ..................................................................................................... 40
4.10 Code Option Register.................................................................................................41
4.11 Instruction Set ............................................................................................................42
4.12 Timing Diagrams ........................................................................................................45
5 ABSOLUTE MAXIMUM RATING ....................................................................................... 46
6 ELECTRICAL CHARACTERISTICS.................................................................................. 46
6.1 DC Characteristic .......................................................................................................46
6.2 AC Characteristic .......................................................................................................47
7 Application Circuit ............................................................................................................ 48
APPENDIX
A Package Types .................................................................................................................. 49
B Package Information......................................................................................................... 49
Doc. Version
1.0
Specification Revision History
Revision Description
Initial version
Date
06/01/2004
www.DataSheet4U.com
iv
Product Specification (V1.0) 06.01.2004

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EM78P451S 전자부품, 판매, 대치품
www.DataSheet4U.com
EM78P451S
8-Bit Microcontroller with OTP ROM
Table 1 Pin description
Symbol Pin No. Type
R-OSCI
39
I
OSCO
40
P90~P95 5~10
O
I/O
P80~P87 19~26 I/O
P70~P72 37~35 I/O
P70/
RESET
37
I/O
CLK
4 I/O
DATA 3 I/O
P60~P67 27~34
P50~P57 11~18
VDD
VSS
38
1
I/O
I/O
-
-
/INT 2 I
SDI 7 I/O
SDO 8 I/O
SCK
9 I/O
/SS 10 I/O
Function Description
In XTAL mode: Crystal input; In internal C, external R mode: 56Kohm±5% pull
high for 1.8432MHz.
In XTAL mode: Crystal output; In RC mode: Instruction clock output.
General bi-directional I/O port. All of its pins can be pulled-high by software.
P90 and P91 are pin-change wake up pins.
General bi-directional I/O port. All of its pins can be pulled-high by software.
P80 and P81 are also used as the R-option pins.
LED direct-driving pin with internal serial resistor used as output and is
software defined.
LED direct-driving pin with internal serial resistor used as output and is
software defined.
Code option bit 3 (REN): reset enable
REN=0 => for reset pin
REN=1 => for general purpose I/O (P70)
Internal pull high resistor 220Kohm
By connecting P74 and P76 together.
P74 can be pulled-high by software and it is also a pin-change wake up pin.
P76 can be defined as an open-drain output.
By connecting P75 and P77 together.
P75 can be pulled-high by software and it is also a pin-change wake up pin.
P77 can be defined as an open-drain output.
General bi-directional port. All of its pins can be pulled-high by software, and
pin-change wake up pins.
General bi-directional I/O port. All of its pins can be pulled-high individually by
software.
Power supply pin.
Ground pin.
An interrupt schmitt-triggered pin.
The function of interrupt triggers at the falling edge.
Users can enable it by software.
Serial data in for SPI
Serial data out for SPI.
Serial clock for SPI.
/Slave select for SPI.
www.DataSheet4U.com
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
3

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