EM78458/459
8-Bit Microcontroller
with MASK ROM
Product
Specification
D
OC
. V
ERSION
1.4
ELAN MICROELECTRONICS CORP.
May 2005
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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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ELAN MICROELECTRONICS CORPORATION
Headquarters:
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Hsinchu Science Park
Hsinchu, Taiwan 30077
Tel: +886 3 563-9977
Fax: +886 3 563-9966
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Corporation, Ltd.
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Technology Group
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Elan Microelectronics Corp.
(Europe)
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Elan Microelectronics
Shenzhen, Ltd.
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Shanghai Corporation, Ltd.
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Contents
Product Specification (V1.4) 05.27.2005
iii
Contents
1 GENERAL
DESCRIPTION................................................................................................... 1
2 FEATURES........................................................................................................................... 1
3 PIN
ASSIGNMENT ............................................................................................................... 3
3.1 EM78458 Pin Description.............................................................................................3
3.2 EM78459 Pin Description.............................................................................................4
4 FUNCTION
DESCRIPTION.................................................................................................. 5
4.1 Operational
Registers ..................................................................................................5
4.1.1 R0
(Indirect
Addressing Register) .................................................................................5
4.1.2 R1 (Time Clock /Counter)..............................................................................................5
4.1.3 R2
(Program
Counter) & Stack......................................................................................5
4.1.4 R3
(Status Register) ......................................................................................................7
4.1.5 R4 (RAM Select Register) .............................................................................................7
4.1.6 R5 ~ R6 (Port 5 ~ Port 6)...............................................................................................7
4.1.7 R7 ~ R8 .........................................................................................................................7
4.1.8 R9
(ADCON:
Analog
to Digital Control).........................................................................9
4.1.9 RA (ADDATA: the converted value of ADC) ..................................................................9
4.1.10 RB..................................................................................................................................9
4.1.11 RC................................................................................................................................10
4.1.12 RD................................................................................................................................10
4.1.13 RE................................................................................................................................10
4.1.14 RF (Interrupt Status Register) .....................................................................................10
4.2.15 R10 ~ R3F ...................................................................................................................10
4.2 Special Purpose Registers ......................................................................................... 11
4.2.1 A
(Accumulator) ........................................................................................................... 11
4.2.2 CONT
(Control Register) ............................................................................................. 11
4.2.3 IOC50 ~ IOC60 (I/O Port Control Register).................................................................12
4.2.4 IOC90
(GCON:
I/O Configuration & Control of ADC ) .................................................12
4.2.5 IOCA0 ( AD-CMPCON ) .............................................................................................13
4.2.6 IOCB0
(Pull-down
Control Register) ...........................................................................14
4.2.7 IOCC0
(Open-Drain Control Register) ........................................................................14
4.2.8 IOCD0
(Pull-high
Control Register) .............................................................................15
4.2.9 IOCE0 (WDT Control Register) ...................................................................................15
4.2.10 IOCF0 (Interrupt Mask Register) .................................................................................16
4.2.11 IOC51 ( PWMCON ) ....................................................................................................17
4.2.12 IOC61 ( DT1L: the Least Significant Byte
( Bit 7 ~ Bit 0) of Duty Cycle of PWM1 ) .....................................................................17
4.2.13 IOC71 ( DT1H: the Most Significant Byte
( Bit 1 ~ Bit 0 ) of Duty Cycle of PWM1 ) ....................................................................18
4.2.14 IOC81 ( PRD1: Period of PWM1 )...............................................................................18
4.2.15 IOC91 ( DT2L: the Least Significant Byte
( Bit 7 ~ Bit 0 ) of Duty Cycle of PWM2 ) ..................................................................18
Contents
iv
Product Specification (V1.4) 05.27.2005
4.2.16 IOCA1 ( DT2H: the Most Significant Byte
( Bit 1 ~ Bit 0 ) of Duty Cycle of PWM2 ) ....................................................................18
4.2.17 IOCB1 ( PRD2: Period of PWM2 ) ..............................................................................19
4.2.18 IOCC1 ( DL1L: the Least Significant Byte
( Bit 7 ~ Bit 0 ) of Duty Cycle Latch of PWM1 ) ..........................................................19
4.2.19 IOCD1 ( DL1H: the Most Significant Byte
( Bit 1 ~ Bit 0 ) of Duty Cycle Latch of PWM1 ) ..........................................................19
4.2.20 IOCE1 ( DL2L: the Least Significant Byte
( Bit 7 ~ Bit 0) of Duty Cycle Latch of PWM2 ) ...........................................................19
4.2.21 IOCF1 ( DL2H: the Most Significant Byte
( Bit 1 ~ Bit 0 ) of Duty Cycle Latch of PWM2 ) ..........................................................19
4.3 TCC/WDT & Prescaler ...............................................................................................19
4.4 I/O
Ports .....................................................................................................................20
4.5 RESET
and
Wake-up .................................................................................................23
4.5.1 The
Function
of
RESET and Wake-up ........................................................................23
4.5.2 The Status of T, and P of STATUS Register ................................................................25
4.6 Interrupt......................................................................................................................26
4.7 Analog-To-Digital Converter (ADC) ............................................................................27
4.7.1 ADC Control Register (ADCON/R9, AD-CMP-CON/IOCA0, GCON/IOC90) .............28
4.7.2 ADC Data Register (ADDATA/RA) ..............................................................................30
4.7.3 A/D
Sampling Time......................................................................................................30
4.7.4 A/D
Conversion Time...................................................................................................30
4.7.5 A/D
Operation
During Sleep Mode..............................................................................31
4.7.6 Programming
Steps/Considerations............................................................................31
4.8 Dual Sets of PWM ( Pulse Width Modulation )...........................................................34
4.8.1 Overview......................................................................................................................34
4.8.2 Increment Timer Counter ( TMRX: TMR1H/TWR1L or TMR2H/TWR2L )..................35
4.8.3 PWM Period ( PRDX : PRD1 or PRD2 ) .....................................................................35
4.8.4 PWM Duty Cycle ( DTX: DT1H/ DT1L and DT2H/ DT2L; DTL:
DL1H/DL1L
and
DL2H/DL2L ).....................................................................................35
4.8.5 Comparator X ..............................................................................................................35
4.8.6 PWM
Programming
Procedures/Steps........................................................................35
4.9 Timer ..........................................................................................................................36
4.9.1 Overview......................................................................................................................36
4.9.2 Function
description ....................................................................................................36
4.9.3 Programming the Related Registers ...........................................................................37
4.9.4 Timer
programming
procedures/steps.........................................................................37
4.10 Comparator ................................................................................................................37
4.10.1 External Reference Signal...........................................................................................37
4.10.2 Comparator Outputs ....................................................................................................38
4.10.3 Using as An Operation Amplifier..................................................................................38
4.10.4 Interrupt .......................................................................................................................38
4.10.5 Wake-up from SLEEP Mode .......................................................................................39
4.11 The Initialized Values after Reset...............................................................................39
4.12 Oscillator ....................................................................................................................43
Contents
Product Specification (V1.4) 02.27.2005
v
4.12.1 Oscillator Modes..........................................................................................................43
4.12.2 Crystal Oscillator/Ceramic Resonators (XTAL) ...........................................................44
4.12.3 External RC Oscillator Mode .......................................................................................45
4.12.4 RC Oscillator Mode with Internal Capacitor ................................................................46
4.13 Power-on Considerations...........................................................................................47
4.13.1 External Power on Reset Circuit .................................................................................47
4.13.2 Residue-Voltage Protection.........................................................................................48
4.14 CODE OPTION ..........................................................................................................49
4.15 Instruction Set ............................................................................................................49
4.16 Timing Diagrams ........................................................................................................52
5 ABSOLUTE
MAXIMUM
RATINGS..................................................................................... 53
6 ELECTRICAL
CHARACTERISTICS.................................................................................. 53
6.1 DC Electrical Characteristic(Ta=0
C ~ 70 C, VDD=5.0V5%, VSS=0V) ..................53
6.2 AC Electrical Characteristic (Ta=0
C ~ 70 C, VDD=5V5%, VSS=0V) ....................54
6.3 A/D Converter Characteristic(Vdd=3.0V to 5.5V,Vss=0V,Ta=0 to 70) ....................54
6.4 Comparator(OP) Characteristic(Vdd = 5.0V,Vss=0V,Ta=0 to 70) ...........................55
APPENDIX
A Package
Types .................................................................................................................. 56
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