EM78P156EL
OTP ROM
Specification Revision History
Version
1.0
1.1
1.2
1.3
Initial version
Change set up time period
Change Power on reset content
Change ISB1 & ICC3 current range
Add the Device Characteristic at section 6.3
07/29/2004
04/19/2002
07/01/2003
Content
Application Note
AN-001 EM78P156E v.s. EM78P156 on the DC characteristics and program timing
AN-002 EM78P156E v.s. EM78P156 on the initialized value for registers
AN-003 Q & A on EM78P156E
This specification is subject to change without prior notice.
2
07.29.2004 (V1.3)
EM78P156EL
OTP ROM
1. GENERAL DESCRIPTION
EM78P156EL is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS
technology. It is equipped with 1K*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. 6 OPTION bits are also available to meet user’s requirements.
With its OTP-ROM feature, the EM78P156EL is able to offer a convenient way of developing and verifying
user’s programs. Moreover, user can take advantage of EMC Writer to easily program his development
code.
This specification is subject to change without prior notice.
3
07.29.2004 (V1.3)
EM78P156EL
OTP ROM
2. FEATURES
• Operating voltage range : 2.3V~5.5V
• Operating temperature range: 0°C~70°C
• Operating frequency rang (base on 2 clocks ):
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
* ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
• Low power consumption:
* Less then 2.0 mA at 5V/4MHz
* Typically 15
µA
at 3V/32KHz
* Typically 1
µA
during sleep mode
• 1K
×
13 bits on chip ROM
• One security register to prevent intrusion of OTP memory codes
• One configuration register to accommodate user’s requirements
• 48× 8 bits on chip registers (SRAM, general purpose register)
• 2 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
• Three available interruptions
* TCC overflow interrupt
* Input-port status changed interrupt (wake up from sleep mode)
* External interrupt
• Programmable free running watchdog timer
• 8 programmable pull-high pins
• 7 programmable pull-down pins
• 8 programmable open-drain pins
• 2 programmable R-option pins
• Package types:
* 18 pin DIP 300mil
* 18 pin SOP 300mil
: EM78P156ELP
: EM78P156ELM
4
07.29.2004 (V1.3)
This specification is subject to change without prior notice.
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