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Número de pieza | EM78P468N | |
Descripción | 8-BIT Microcontroller | |
Fabricantes | ELAN Microelectronics | |
Logotipo | ||
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EM78P468N
8-BIT
Microcontroller
Product
Specification
DOC. VERSION 1.2
ELAN MICROELECTRONICS CORP.
March 2005
1 page EM78P468N
8-BIT Microcontroller
1 GENERAL DESCRIPTION
This LSI is an 8-bit RISC type microprocessor with high speed CMOS technology and
low power consumption. Integrated onto a single chip are on chip watchdog timer (WDT),
Data RAM, ROM, programmable real time clock counter, internal/external interrupt,
power down mode, LCD driver, infrared transmitter function, and tri-state I/O. The
EM78P468N provides multi-protection bits to protect against intrusion of user’s code in
the OTP memory and a seven option bits to accommodate user’s requirements. It also
provides an especial 13 bits customer ID option.
With its OTP-ROM feature, this LSI offers a convenient way of developing and verifying
user’s programs. Moreover, user developed code can be easily programmed with the
ELAN writer.
2 FEATURES
2.1 CPU
Operating voltage and temperature range:
z Commercial: 2.2V ~ 5.5 V. (at 0℃~+70℃)
z Industrial: 2.5V ~ 5.5 V. / (at -40℃~+85℃)
Operation speed: DC ~ 10MHz clock input.
Dual clock operation
z High frequency oscillator can select among Crystal, RC, or PLL (phase lock
loop)
z Low frequency oscillator can select between Crystal or RC mode
Totally 272 bytes SRAM
z 144 bytes general purpose register
z 128 bytes on chip data RAM
4K*13 bits OTP - ROM (One Time Programmable - Read Only Memory)
Up to 28 bi-directional tri-state I/O ports
z Typically, 12 bi-directional tri-state I/O ports.
z 16 bi-directional tri-state I/O ports shared with LCD segment output pin.
8-level stack for subroutine nesting
8-bit real time clock/counter (TCC)
One infrared transmitter/PWM generator function
Product Specification (V1.2) 03.15.2005
(This specification is subject to change without further notice)
•1
5 Page EM78P468N
8-BIT Microcontroller
PIN
VDD
GND
R-OSCI
OSCO
Xin
Xout
/RESET
P5.4/INT0
P5.5/INT1
P5.6/TCC
Table 1 (a) Pin Description for Package of QFP64 and LQFP64
PIN number I/O type
Description
29 I * Power supply pin
26 I * System ground pin
* In crystal mode: crystal input
* In RC mode: resistor pull high.
27 I * In PLL mode: connect 0.01μF capacitance to GND
* Connect 0.01μF capacitor to GND and code option select
PLL mode when high oscillator is not use.
28
O
* In crystal mode: crystal output
* In RC mode: instruction clock output
* In crystal mode:Input pin for sub-oscillator. Connect to a
30
I
32.768KHz crystal
* RC mode: this pin is connected with a resistor to high
level.
31
O
* In crystal: Connect to a 32.768KHz crystal
* In RC mode: instruction clock output
25
I
* Low active. If set as /RESET and remains at logic low, the
devices will be reset
* General purpose I/O pin. /external interrupt.
* INT0 interruption source can be set to falling or rising
32 I/O edge by IOC71 register bit 7 (INT_EDGE).
* Wake up from sleep mode and idle mode when the pin
status changes.
* General purpose I/O pin. /external interrupt.
33
I/O
* Interruption source is a falling edge signal.
* Wake up from sleep mode and idle mode when the pin
status changes.
34
I/O
* General purpose I/O/ external counter input
* This pin works in normal/green/idle mode.
P5.7/IROUT
37
I/O
* General purpose I/O pin or IR/PWM mode output pin,
* Capable of sinking 20mA/5V.
P6.0
~
P6.7
COM3~0
SEG0~SEG15
SEG16/P7.0
~
SEG23/P7.7
SEG24/P8.0
~
SEG30/P8.6
SEG31/P8.7
VB
VA
VLCD2
VLCD3
NC
38~45
17~20
16~1
64
~
57
56
~
50
46
21
22
23
24
35~36
47~49
I/O
O
O
O/(I/O)
O/(I/O)
O
O
O
O
* General purpose I/O pin.
* Pull-high, pull-low and open drain function support.
* All pins can wake up from sleep and idle modes when the
pin status changes.
* LCD common output pin.
* LCD segment output pin.
* LCD segment output pin. Can be shared with general
purposes I/O pin
* LCD segment output pin. Can be shared with general I/O
pin
* For general purpose I/O use, can wake up from sleep
mode and idle mode when the pin status changes.
* For general purposes I/O use, supports pull-high
function.
* Connect capacitors for LCD bias voltage
* Connect capacitors for LCD bias voltage
* One of LCD bias voltage
* One of LCD bias voltage
Product Specification (V1.2) 03.15.2005
•7
(This specification is subject to change without further notice)
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet EM78P468N.PDF ] |
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