EM78156E
8-Bit Microcontroller
with MASK ROM
Product
Specification
D
OC
. V
ERSION
1.3
ELAN MICROELECTRONICS CORP.
July 2004
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are trademarks of ELAN Microelectronics Corporation.
Copyright
2005 by ELAN Microelectronics Corporation
All Rights Reserved
Printed in Taiwan
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responsibility concerning the accuracy, adequacy, or completeness of this specification. ELAN Microelectronics makes
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information and material may change to conform to each confirmed order.
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ELAN MICROELECTRONICS CORPORATION
Headquarters:
No. 12, Innovation Road 1
Hsinchu Science Park
Hsinchu, Taiwan 30077
Tel: +886 3 563-9977
Fax: +886 3 563-9966
http://www.emc.com.tw
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Elan (HK) Microelectronics
Corporation, Ltd.
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Elan Information
Technology Group
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Saratoga, CA 95070
USA
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Elan Microelectronics Corp.
(Europe)
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8050 Zurich, SWITZERLAND
Tel: +41 43 299-4060
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Shenzhen:
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Shanghai Corporation, Ltd.
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Fax: +86 021 5080-4600
Contents
Product Specification (V1.3) 07.29.2004
iii
Contents
1 GENERAL
DESCRIPTION ......................................................................................... 1
2 FEATURES ................................................................................................................. 1
3 PIN
ASSIGNMENT ..................................................................................................... 2
4 FUNCTION
DESCRIPTION ........................................................................................ 4
4.1 Operational
Registers......................................................................................... 4
4.1.1 R0
(Indirect
Addressing Register) .......................................................................4
4.1.2 R1 (Time Clock /Counter)....................................................................................4
4.1.3 R2
(Program
Counter) & Stack ...........................................................................5
4.1.4 R3
(Status Register) ............................................................................................6
4.1.5 R4 (RAM Select Register)...................................................................................7
4.1.6 R5 ~ R6 (Port 5 ~ Port 6) ....................................................................................7
4.1.7 RF
(Interrupt
Status Register) .............................................................................7
4.1.8 R10
~ R3F...........................................................................................................7
4.2 Special Purpose Registers ................................................................................. 8
4.2.1 A
(Accumulator)...................................................................................................8
4.2.2 CONT
(Control Register).....................................................................................8
4.2.3 IOC5 ~ IOC6 (I/O Port Control Register) ............................................................8
4.2.4 IOCA
(Prescaler
Counter Register).....................................................................9
4.2.5 IOCB
(Pull-down
Control Register) .....................................................................9
4.2.6 IOCC
(Open-drain
Control Register)...................................................................9
4.2.7 IOCD
(Pull-high
Control Register).....................................................................10
4.2.8 IOCE
(WDT
Control Register)...........................................................................10
4.2.9 IOCF
(Interrupt
Mask Register).........................................................................11
4.3 TCC/WDT & Prescaler ..................................................................................... 11
4.4 I/O
Ports ........................................................................................................... 12
4.5 RESET
and
Wake-up ....................................................................................... 15
4.5.1 RESET ..............................................................................................................15
4.5.2 The Status of RST, T, and P of STATUS Register.............................................19
4.6 Interrupt ............................................................................................................ 20
4.7 Oscillator .......................................................................................................... 22
4.7.1 Oscillator Modes................................................................................................22
4.7.2 .Crystal
Oscillator/Ceramic Resonators(XTAL) .................................................22
4.7.3 External
RC
Oscillator Mode.............................................................................23
4.8 CODE Option Register ..................................................................................... 25
4.9 Power On Considerations ................................................................................ 25
4.10 External Power On Reset Circuit...................................................................... 26
4.11 Residue-Voltage Protection.............................................................................. 26
4.12 Instruction Set .................................................................................................. 27
4.13 Timing Diagrams .............................................................................................. 30
Contents
iv
Product Specification (V1.3) 07.29.2004
5
ABSOLUTE MAXIMUNM RATINGS ........................................................................ 31
6 ELECTRICAL
CHARACTERISTICS ........................................................................ 31
6.1 DC Electrical Characteristic.............................................................................. 31
6.2 AC Electrical Characteristic.............................................................................. 32
6.3 Device
Characteristic ....................................................................................... 33
APPENDIX
A Package
Types......................................................................................................... 43
B Package
Information............................................................................................... 43
Specification Revision History
Doc. Version
Revision Description
Date
1.0 Initial
version
1.1
Change set up time period
04/19/2002
1.2
Change Power on reset content
Change from EM78P156E to EM78156E
07/01/2003
1.3
Add the Device Characteristic at section 6.3
07/29/2004
EM78156E
8-Bit Microcontroller with MASK ROM
Product Specification
(V1.3) 07.29.2004
1
(This specification is subject to change without further notice)
1 GENERAL
DESCRIPTION
EM78156E is an 8-bit microprocessor with low-power and high-speed CMOS
technology. Integrated into a single chip are on-chip watchdog timer (WDT), RAM,
ROM, real time clock/counter, external and interrupt, power down mode, and tri-state
I/O.
2 FEATURES
Operating voltage range : 2.3V~5.5V
Operating temperature range: 0
C~70C
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
A at 3V/32KHz
Typically 1
A during sleep mode
1K
13 bits on chip ROM
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
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