EM78P447S
OTP ROM
Specification Revision History
Version
Content
1.0 Initial
version
1.1
Change Power on reset content
06/25/2003
1.2
Add the device characteristic at section 6.3
5/11/2004
Application Note
AN-001: Seven-segment and I/O Port
AN-002: Keystroke Times Displayed by Seven-segment
AN-003: Jumping out of DELAY Subroutine Loop by External Keystroke
AN-004: LED with Controlled Rotating Direction
AN-005: Sing a Song "Draw" of EM78447
AN-006: Stepping Motor
AN-007: EM78P447S v.s. EM78P447 on the DC characteristics and program timing
AN-008: About EM78P447S Sleep2 mode setting
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
2
EM78P447S
OTP ROM
1. GENERAL DESCRIPTION
EM78P447S is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped
with 4K*13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a
PROTECTION bit to prevent user's code in the OTP memory from being intruded. Seven OPTION bits are
also available to meet user's requirements.
With its OTP-ROM feature, the EM78P447S is able to offer a convenient way of developing and verifying
user's programs. Moreover, user can take advantage of ELAN Writer to easily program his development
code.
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
3
EM78P447S
OTP ROM
2. FEATURES
Operating voltage range: 2.3V~5.5V.
Operating temperature range: 0
C~70C.
Operating frequency range( base on 2 clocks)
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
* RC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
Low power consumption:
* Less then 2.2 mA at 5V/4MHz
* Typically 30
A, at 3V/32KHz
* Typically 1
A, during sleep mode
4K
13 bits on chip ROM
One security register 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 600 mil
: EM78P447SAP
* 28 pin SOP (SOIC) 300 mil : EM78P447SAM
* 28 pin SSOP 209 mil : EM78P447SAS
* 32 pin DIP 600 mil
: EM78P447SBP
* 32 pin SOP (SOIC) 450 mil : EM78P447SBWM
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
4
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