EM78862C 데이터 시트보기 (PDF) - ELAN Microelectronics
부품명
상세내역
제조사
EM78862C Datasheet PDF : 42 Pages
| |||
EM78862C
8-Bit RISC Type Microprocessor
1 General Description
The EM78862C is an 8-bit RISC type microprocessor with low power, high speed
CMOS technology. Integrated into the single chip are built-in watchdog (WDT), RAM,
ROM, programmable real-time clock/counter, internal interrupt, power-down mode,
LCD driver, and bi-directional I/O. The EM78862C provides a single chip solution for
scientific calculator design applications.
2 Features
2.1 CPU
Operating voltage range: 2.2V ~ 3.6V
16K x 13 on-chip ROM
1.25K x 8 on-chip RAM
144 byte working register
Up to 24 bi-directional I/O ports (16 shared with LCD segment pins)
8 level stack for subroutine nesting
8-bit real time clock/counter (TCC) can be configured as interrupt sources with
prescaler
Two sets of 8 bit counters are set as interrupt sources with prescaler
Programmable free running on-chip watchdog timer
Four modes (internal PLL clock 3.579MHz)
• SLEEP Mode:CPU and 3.579MHz clock turn off, 32.768kHz clock turn off
• IDLE Mode:CPU and 3.579MHz clock turn off, 32.768kHz clock turn on
• GREEN Mode: 3.579MHz clock turn off, CPU and 32.768kHz clock turn on
• NORMAL Mode: 3.579MHz clock turn on, CPU and 32.768kHz clock turn on
Input port wake up function
Six interrupt sources: three internal, three external
• Internal:
1. TCIF for TCC timer overflow interrupt
2. CNT1 for COUNTER 1 overflow interrupt
3. CNT2 for COUNTER 2 overflow interrupt
• External:
1. INT 0 for Port 70, Port 71, Port 72, or Port 73, has a falling edge
trigger interrupt
2. INT 1 for Port 74, Port 75, or Port 76, has a falling edge trigger
interrupt
3. INT 3 for Port 77 has a rising edge or falling edge trigger (by CONT
register) interrupt
67-pin die chip (EM78862CH)
Port key scan function
Clock frequency 32.768kHz or RC mode
Product Specification (V2.1) 07.13.2005
•1
(This specification is subject to change without further notice)
Share Link: 