EM78P447N
OTP ROM
2. FEATURES
• Operating voltage range: 2.5V~5.5V.
• Operating temperature range: -40°C~85°C.
• Operating frequency rang( base on 2 clocks)
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.5V.
* RC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.5V.
• Low power consumption:
* Less then 2.2 mA at 5V/4MHz
* Typically 35 µA, at 3V/32KHz
* Typically 2 µA, during sleep mode
• 4K × 13 bits on chip ROM
• Three protection bits to prevent intrusion of OTP memory codes
• One configuration register to accommodate user’s requirements
• 148× 8 bits on chip registers(SRAM, general purpose register)
• 3 bi-directional I/O ports
• 5 level stacks for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• Two clocks per instruction cycle
• Power down (SLEEP) mode
• Two available interruptions
* TCC overflow interrupt
* External interrupt
• Programmable free running watchdog timer
• 10 programmable pull-high pins
• 2 programmable open-drain pins
• 2 programmable R-option pins
• Package types:
* 28 pin DIP 600mil: EM78P447NAP
* 28 pin SOP 300mil : EM78P447NAM
* 28 pin SSOP 209mil: EM78P447NAS
* 32 pin DIP 600mil: EM78P447NBP
* 32 pin SOP 450mil : EM78P447NBWM
This specification is subject to change without prior notice.
4
10.21.2004 (V1.0)
ELAN [ ELAN MICROELECTRONICS CORP ]
