Data Sheet(eng)

EM78P520N
8-Bit Microprocessor
with OTP ROM
Product
Specification
DOC. VERSION 1.3
ELAN MICROELECTRONICS CORP.
February 2014
Trademark Acknowledgments:
IBM is a registered trademark and PS/2 is a trademark of IBM.
Windows is a trademark of Microsoft Corporation
ELAN and ELAN logo
are trademarks of ELAN Microelectronics Corporation
Copyright © 2009~2014 by ELAN Microelectronics Corporation
All Rights Reserved
Printed in Taiwan
The contents of this specification are subject to change without further notice. ELAN Microelectronics assumes no
responsibility concerning the accuracy, adequacy, or completeness of this specification. ELAN Microelectronics
makes no commitment to update, or to keep current the information and material contained in this specification.
Such information and material may change to conform to each confirmed order.
In no event shall ELAN Microelectronics be made responsible for any claims attributed to errors, omissions, or
other inaccuracies in the information or material contained in this specification. ELAN Microelectronics shall not
be liable for direct, indirect, special incidental, or consequential damages arising from the use of such information
or material.
The software (if any) described in this specification is furnished under a license or nondisclosure agreement, and
may be used or copied only in accordance with the terms of such agreement.
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NO PART OF THIS SPECIFICATION MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS WITHOUT THE EXPRESSED WRITTEN PERMISSION OF ELAN MICROELECTRONICS.
ELAN MICROELECTRONICS CORPORATION
Headquarters:
Hong Kong:
USA:
No. 12, Innovation Road 1
Hsinchu Science Park
Hsinchu, TAIWAN 308
Tel: +886 3 563-9977
Fax: +886 3 563-9966
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http://www.emc.com.tw
Elan (HK) Microelectronics
Corporation, Ltd.
Flat A, 19F., World Tech Centre
95 How Ming Street, Kwun Tong
Kowloon, HONG KONG
Tel: +852 2723-3376
Fax: +852 2723-7780
Elan Information
Technology Group (U.S.A.)
PO Box 601
Cupertino, CA 95015
U.S.A.
Tel: +1 408 366-8225
Fax: +1 408 366-8225
Shenzhen:
Shanghai:
Elan Microelectronics
Shenzhen, Ltd.
Elan Microelectronics
Shanghai, Ltd.
8A Floor, Microprofit Building
Gaoxin South Road 6
Shenzhen Hi-tech Industrial Park
South Area, Shenzhen
CHINA 518057
Tel: +86 755 2601-0565
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Tel: +86 21 5080-3866
Fax: +86 21 5080-0273
elan-sh@elanic.com.cn
Contents
Contents
1
General Description .................................................................................................. 1
2
Features ..................................................................................................................... 1
3
Pin Assignment ......................................................................................................... 2
4
Pin Description.......................................................................................................... 4
5
Block Diagram ........................................................................................................... 9
6
Function Description .............................................................................................. 10
6.1
Register Configuration...................................................................................... 10
6.1.1
6.2
R PAGE Register Configuration........................................................................10
Register Operations ......................................................................................... 10
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.10
6.2.11
6.2.12
6.2.13
6.2.14
6.2.15
6.2.16
6.2.17
6.2.18
6.2.19
6.2.20
6.2.21
6.2.22
6.2.23
6.2.24
6.2.25
6.2.26
6.2.27
6.2.28
6.2.29
6.2.30
R0 (Indirect Addressing Register) .....................................................................10
R1 (TCC)...........................................................................................................10
R2 (Program Counter) ...................................................................................... 11
R3 (LVD Control and Status).............................................................................12
R4 (RAM Select Register).................................................................................13
Bank 0 R5 (RAM Bank Select Register) ...........................................................13
Bank 0 R7 (Port 7) ............................................................................................13
Bank 0 R8 (Port 8) ............................................................................................13
Bank 0 R9 (Port 9) ............................................................................................14
Bank 0 RA (Port A) ............................................................................................14
Bank 0 RB (Port B) ...........................................................................................14
Bank 0 RC SCCR (System Clock Control Register).........................................14
Bank 0 RD TWTCR (TCC and WDT Timer Control Register) ..........................15
Bank 0 RE IMR (Interrupt Mask Register) ........................................................16
Bank 0 RF ISR (Interrupt Status Register)........................................................16
Bank 1 R5 LCDCR (LCD Control Register) ......................................................17
Bank 1 R6 LCDAR (LCD Address Register).....................................................17
Bank 1 R7 LCDBR (LCD Data Buffer) ..............................................................18
Bank 1 R8 LCDVCR (LCD Voltage Control Register).......................................18
Bank 1 R9 LCDCCR (LCD COM Control Register 3) .......................................19
Bank 1 RA LCDSCR0 (LCD Segment Control Register 0)...............................19
Bank 1 RB LCDSCR1 (LCD Segment Control Register 1)...............................19
Bank 1 RC LCDSCR2 (LCD Segment Control Register 2) ..............................20
Bank 1 RE EIMR (External Interrupt Mask Register)........................................20
Bank 1 RF EISR (External Interrupt Status Register) .......................................20
Bank 2 R5 T1CR (Timer 1 Control Register) ....................................................21
Bank 2 R6 TSR (Timer Status Register) ...........................................................22
Bank 2 R7 T1PD (Timer 1 Period Buffer)..........................................................23
Bank 2 R8 T1TD (Timer 1 Duty Buffer).............................................................23
Bank 2 R9 T2CR (Timer 2 Control Register) ....................................................23
Product Specification (V1.3) 02.05.2014
• iii
Contents
6.2.31
6.2.32
6.2.33
6.2.34
6.2.35
6.2.36
6.2.37
6.2.38
6.2.39
6.2.40
6.2.41
6.2.42
6.2.43
6.2.44
6.2.45
6.2.46
6.2.47
6.2.48
6.2.49
6.2.50
6.2.51
6.2.52
6.2.53
6.2.54
6.2.55
6.2.56
6.2.57
6.2.58
6.2.59
6.2.60
6.2.61
6.2.62
6.2.63
6.2.64
6.2.65
6.2.66
6.2.67
6.2.68
6.2.69
6.2.70
6.2.71
iv •
Bank 2 RA T2PD (Timer 2 Period Buffer) .........................................................24
Bank 2 RB T2TD (Timer 2 Duty Buffer) ............................................................24
Bank 2 RC SPIS (SPI Status Register).............................................................24
Bank 2 RD SPIC (SPI Control Register)...........................................................25
Bank 2 RE SPIR (SPI Read Buffer) ..................................................................26
Bank 2 RF SPIW (SPI Write Buffer)..................................................................26
Bank 3 R5 URC (UART Control Register) ........................................................27
Bank 3 R6 URS (UART Status).........................................................................28
Bank 3 R7 URRD (UART_RD Data Buffer) ......................................................28
Bank 3 R8 URTD (UART_TD Data Buffer) .......................................................29
Bank 3 R9 ADCR (A/D Control Register)..........................................................29
Bank 3 RA ADICH (A/D Input Control Register) ...............................................30
Bank 3 RB ADICL (A/D Input Control Register) ................................................30
Bank 3 RC ADDH (AD High 8-bit Data Buffer)..................................................30
Bank 3 RD ADDL (AD Low 4-bit Data Buffer) ...................................................30
Bank 3 RE EIESH (External Interrupt Edge Select High Byte
Control Register) ..............................................................................................31
Bank 3 RF EIESL (External Interrupt Edge Select Low Byte
Control Register) ..............................................................................................31
Bank 4 R5 LEDDCR (LED Drive Control Register) ..........................................32
Bank 4 R6 WBCR (Watch Timer and Buzzer Control Register) ......................32
Bank 4 R7 P7IOCR (Port 7 I/O Control Register).............................................33
Bank 4 R8 P8IOCR (Port 8 I/O Control Register).............................................33
Bank 4 R9 P9IOCR (Port 9 I/O Control Register).............................................33
Bank 4 RA PAIOCR (Port A I/O Control Register) ............................................33
Bank 4 RB PBIOCR (Port B I/O Control Register)............................................34
Bank 4 RC PCIOCR (Port C I/O Control Register) ...........................................34
Bank 4 RF WKCR (Wake-up Control Register) ................................................34
Bank 5 R6 UARC2 (UART Control Register 2).................................................34
Bank 5 R7 P7PHCR (Port 7 Pull-high Control Register) ..................................35
Bank 5 R8 P8PHCR (Port 8 Pull-high Control Register) ..................................35
Bank 5 R9 P9PHCR (Port 9 Pull-high Control Register) ..................................35
Bank 5 RA PAPHCR (Port A Pull-high Control Register) ..................................35
Bank 5 RB PBPHCR (Port B Pull-high Control Register) .................................36
Bank 5 RC PCPHCR (Port C Pull High Control Register) ................................36
Bank 6 R6 LVRCR (Low Voltage Reset Control Register)................................36
Bank 6 R7 P7ODCR (Port 7 Open Drain Control Register) .............................36
Bank 6 R8 P8ODCR (Port 8 Open Drain Control Register) .............................37
Bank 6 R9 P9ODCR (Port 9 Open Drain Control Register) .............................37
Bank 6 RA PAODCR (Port A Open Drain Control Register) .............................37
Bank 6 RB PBODCR (Port B Open Drain Control Register) ............................37
Bank 6 RC (Port C) ...........................................................................................37
R10~R3F (General Purpose Register) .............................................................37
Product Specification (V1.3) 02.05.2014
Contents
6.3
TCC/WDT Prescaler......................................................................................... 38
6.4
I/O Port ............................................................................................................. 39
6.5
Reset and Wake-up.......................................................................................... 40
6.6
Oscillator .......................................................................................................... 50
6.6.1
6.6.2
6.6.3
6.6.4
6.7
Oscillator Modes ...............................................................................................50
Crystal Oscillator/Ceramic Resonators (Crystal) ..............................................50
RC Oscillator Mode with Internal Capacitor......................................................53
Phase Lock Loop (PLL Mode) ..........................................................................53
Power-on Considerations ................................................................................. 55
6.7.1
6.7.2
External Power-on Reset Circuit.......................................................................55
Residue-Voltage Protection ..............................................................................56
6.8
Interrupt ............................................................................................................ 57
6.9
LCD Driver........................................................................................................ 58
6.9.1
6.9.2
6.9.3
6.9.4
R5 LCDCR ( LCD Control Register) .................................................................59
R6 LCDADDR (LCD Address Register)............................................................60
R7 LCDBR (LCD Data Buffer) ..........................................................................61
R8 LCDVCR (LCD Voltage Control Register)...................................................61
6.10 A/D Converter................................................................................................... 69
6.10.1 ADC Data Register............................................................................................70
6.10.2 A/D Sampling Time ...........................................................................................70
6.10.3 A/D Conversion Time ........................................................................................70
6.11 UART (Universal Asynchronous Receiver/Transmitter).................................... 71
6.11.1
6.11.2
6.11.3
6.11.4
6.11.5
UART Mode ......................................................................................................72
Transmitting ......................................................................................................73
Receiving ..........................................................................................................73
Baud Rate Generator........................................................................................74
UART Timing.....................................................................................................74
6.12 SPI (Serial Peripheral Interface)....................................................................... 75
6.12.1
6.12.2
6.12.3
6.12.4
6.12.5
Overview and Features.....................................................................................75
SPI Function Description ..................................................................................77
SPI Signal and Pin Description .........................................................................78
Programming the Related Registers.................................................................80
SPI Mode Timing...............................................................................................83
6.13 Timer/Counter 1................................................................................................ 84
6.13.1
6.13.2
6.13.3
6.13.4
6.13.5
Timer Mode .......................................................................................................85
T1OUT Mode ....................................................................................................85
Capture Mode ...................................................................................................85
PWM Mode .......................................................................................................86
16-Bit Mode.......................................................................................................86
Product Specification (V1.3) 02.05.2014
•v
Contents
6.14 Timer 2 ............................................................................................................. 87
6.14.1 Timer Mode .......................................................................................................88
6.14.2 PWM Mode .......................................................................................................88
6.15 Code Options ................................................................................................... 89
6.16 Instruction Set .................................................................................................. 91
7
Absolute Maximum Ratings ................................................................................... 94
8
DC Electrical Characteristics ................................................................................. 94
8.1
DC Electrical Characteristics............................................................................ 94
8.2
A/D Converter Characteristics.......................................................................... 96
8.3
Phase Lock Loop Characteristics..................................................................... 97
8.3.1
8.3.2
8.4
PLL DC Electrical Characteristics .....................................................................97
AC Electrical Characteristics.............................................................................97
Device Characteristics...................................................................................... 97
9
AC Electrical Characteristics ............................................................................... 106
10
Timing Diagrams ................................................................................................... 107
APPENDIX
A
Ordering and Manufacturing Information ........................................................... 108
B
Package Type......................................................................................................... 109
C
Package Information..............................................................................................110
C.1 EM78P520NQ44 ............................................................................................ 110
C.2 EM78P520NL44 ..............................................................................................111
C.3 EM78P520NL48 ............................................................................................. 112
D
Quality Assurance and Reliability ........................................................................113
D.1 Address Trap Detect....................................................................................... 113
E
EM78P520N Program Pin List ...............................................................................114
F
ICE 520 Oscillator Circuit (JP4) ............................................................................114
vi •
F.1
Mode 1 ........................................................................................................... 114
F.2
Mode 2 ........................................................................................................... 115
F.3
Mode 3 ........................................................................................................... 115
F.4
Mode 4 ........................................................................................................... 115
F.5
Mode 5 ........................................................................................................... 116
F.6
Mode 6 ........................................................................................................... 116
F.7
Mode 7 ........................................................................................................... 116
Product Specification (V1.3) 02.05.2014
Contents
Specification Revision History
Doc. Version
Revision Description
Date
1.0
Initial released version
2009/04/01
1.1
Modified the PLL mode that is used.
2011/03/23
1.2
Added LVR specifications
2013/04/09
1.3
Deleted the 32-pin Package Type
2014/02/05
Product Specification (V1.3) 02.05.2014
• vii
Contents
viii •
Product Specification (V1.3) 02.05.2014
EM78P520N
8-Bit Microprocessor with OTP ROM
1 General Description
The EM78P520N is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. Integrated
onto a single chip are on-chip Watchdog Timer (WDT), LCD Data RAM, ROM, programmable real time clock
counter, internal/external interrupt, power down mode, 12 bits A/D Converter, UART, SPI, 8-channel LED driver,
LCD driver and tri-state I/O.
2 Features
CPU Configuration
• 8K×13 bits on-chip ROM
• 272×8 bits on-chip registers (SRAM)
• 8-level stacks for subroutine nesting
• Dual clock operation or PLL operation mode
• Four operation mode: Normal, Green, Idle, Sleep
• Less than 2.1 mA at 5V/4MHz
• Typically 22 µA, at 3V/32kHz
• Typically 8 µA, during sleep mode
• Single Instruction Cycle Commands
„ I/O Port Configuration
• Six bidirectional I/O ports : P7, P8, P9, PA, PB, PC
• 43 I/O pins
• 8-pin Direct Drive LED
• 39 Programmable open-drain I/O pins
• 43 programmable pull-high I/O pins
• External interrupt : P74~P77, PB0~PB3, P82~P83
„ Operating voltage range:
„
„
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
Serial peripheral interface (SPI) available
8-bit real Time Clock/Counter (TCC)
•
12-channels Analog-to-Digital Converter with
12-bit resolution in Vref mode
LCD: 8×23 dots, bias (1/2, 1/3, 1/4),
duty (static, 1/3, 1/4, 1/8)
Two 8-bit timers
8-bit Timer 1, auto reload counter/timer which
can be an interrupt source. Function mode;
Timer, Toggle output, UART baud rate generator,
Capture, PWM
8-bit Timer 2, auto reload timer which can be an
interrupt source. Function mode; Timer, SPI
baud rate generator, PWM
Two sets of 8-bit auto reload counter/timer which
can be cascaded to one 16-bit counter/timer
Universal asynchronous receiver / transmitter
(UART) available
Four programmable watch timer: 1.0 sec,
0.5 sec, 0.25sec, 3.91ms
Four programmable buzzer output: 0.5kHz,
1kHz, 2kHz, 4kHz
Four programmable Level Voltage Detector
(LVD) : 3.9V, 3.3V, 2.7V, 2.4V
Power-on reset and three Programmable Level
Voltage Reset POR: 2.1V (Default)
LVR: 3.9V, 3.3V, 2.6V
•
•
•
•
•
•
•
•
„
DC~16MHz/2 clks @ 5V; DC~125ns inst Cycle @ 5V
Sub Clock
• Crystal mode: 32.768kHz
• ERIC mode: 33kHz (2.2MΩ)
„ Special Features
• Programmable free running watchdog timer
• High ESD immunity
• High EFT immunity
• Power saving Sleep mode
• Selectable Oscillation mode
•
•
•
OTP version:
• Operating voltage range : 2.3V~5.5V
„ Operating temperature range : -40~85°C
Operating frequency range:
• Crystal/RC oscillation circuit selected by code option
for system clock
• 32.768kHz crystal/RC oscillation circuit selected by
code option for sub-oscillation
Main Clock
• Crystal mode:
DC~20MHz/2 clks @ 5V; DC~100ns inst. cycle @ 5V
DC~8MHz/2 clks @ 3V; DC~250ns inst. Cycle @ 3V
DC~4MHz/2 clks @ 2.3V; DC~500ns inst. Cycle @ 2.3V
• ERIC mode:
DC~2.2MHz/2 clks @ 2.3V; DC~909ns inst. cycle @ 2.3V
• PLL mode:
Peripheral Configuration
•
„
Eighteen available interrupts:
•
•
TCC overflow interrupt
Ten External interrupts
(wake-up from sleep mode)
• ADC completion interrupt
• Two timer interrupt
• Watch timer interrupt
• Two serial I/O interrupt
• Low voltage detect (LVD)
„ Package Type:
• 44 pin QFP 10×10mm : EM78P520NQ44J/S
• 44 pin LQFP 10×10mm : EM78P520NL44J/S
• 48 pin LQFP 7×7mm : EM78P520NL48J/S
Note: These are Green Products which do not contain
hazardous substances.
•1
EM78P520N
8-Bit Microprocessor with OTP ROM
3
Pin Assignment
Figure 3-2 EM78P520NQ44/L44
2•
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
48
47
46
45
44
43
42
41
40
39
38
37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
25
12
13
14
15
16
17
18
19
20
21
22
23
24
Figure 3-3 EM78P520NL48
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
•3
EM78P520N
8-Bit Microprocessor with OTP ROM
4
Pin Description
Name
P70/SEG12
P71/SEG13
P72/SEG14
P73/SEG15
P74/SEG18/INT0
P75/INT1/T1OUT/
PWM1
P76/INT2/T1CK
P77/INT3/T1CAP
P81/
/RESET
P82/INT8/AD8
4•
Function
Input
Type
Output
Type
P70
ST
CMOS
SEG12
-
AN
P71
ST
CMOS
SEG13
-
AN
P72
ST
CMOS
SEG14
-
AN
P73
ST
CMOS
SEG15
-
AN
P74
ST
CMOS
SEG18
-
AN
INT0
ST
-
P75
ST
CMOS
INT1
ST
-
External interrupt pin
T1OUT
-
CMOS
Timer 1 T1OUT mode
PWM1
-
CMOS
Timer 1 PWM mode
P76
ST
CMOS
Bidirectional I/O pin with programmable pull-high and
open-drain.
Description
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 12 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 13 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 14 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 15 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 18 output
External interrupt pin
Bidirectional I/O pin with programmable pull-high and
open-drain.
INT2
ST
-
External interrupt pin
T1CK
ST
-
Timer 1 Counter mode
P77
ST
CMOS
INT3
ST
-
External Interrupt pin
T1CAP
ST
-
Timer 1 Capture mode
P81
ST
CMOS
/RESET
ST
-
P82
ST
CMOS
INT8
ST
-
External interrupt pin
AD8
AN
-
ADC Input 8
Bidirectional I/O pin with programmable pull-high and
open-drain.
Bidirectional I/O pin with programmable pull-high and
open-drain.
Internal pull-high (set P57 pull-high) reset pin
Bidirectional I/O pin with programmable pull-high and
open-drain.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
(Continuation)
Name
P83/COM7/INT9/
AD7
P84/VREF
P85/COM6/AD6
Function
Input
Type
Output
Type
P83
ST
CMOS
COM7
-
AN
INT9
ST
-
External interrupt pin
AD7
AN
-
ADC Input 7
P84
ST
CMOS
VREF
AN
-
P85
ST
CMOS
COM6
-
AN
AN
-
AD6
P86/COM5/AD5
P87/COM4/AD4
P90/AD3/PWM2
P91/AD2/BUZ
P92/AD1
P93/AD0
P94/COM3
Description
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Common 7 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
Voltage reference for ADC
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Common 6 output
ADC Input 6
Bidirectional I/O pin with programmable pull-high and
open-drain.
P86
ST
CMOS
COM5
-
AN
AD5
AN
-
P87
ST
CMOS
COM4
-
AN
AD4
AN
-
P90
ST
CMOS
AD3
AN
-
PWM2
-
CMOS
Timer 2 PWM mode
P91
ST
CMOS
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
AD2
AN
-
BUZ
-
CMOS
Buzzer Timer output
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
P92
ST
CMOS
AD1
AN
-
P93
ST
CMOS
AD0
AN
-
P94
ST
CMOS
COM3
-
AN
LCD Common 5 output
ADC Input 5
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Common 4 output
ADC Input 4
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
ADC Input 3
ADC Input 2
ADC Input 1
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
ADC Input 0
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
LCD Common 3 output
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
•5
EM78P520N
8-Bit Microprocessor with OTP ROM
(Continuation)
Name
P95/COM2
P96/COM1
P97/COM0
PA0/SEG0
PA1/SEG1
PA2/SEG2
PA3/SEG3
PA4/SEG4/SI
PA5/SEG5/SO
PA6/SEG6/SCK
PA7/SEG7//SS
6•
Function
Input
Type
Output
Type
Description
P95
ST
CMOS
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
COM2
-
AN
P96
ST
CMOS
COM1
-
AN
P97
ST
CMOS
COM0
-
AN
PA0
ST
CMOS
SEG0
-
AN
PA1
ST
CMOS
SEG1
-
AN
PA2
ST
CMOS
SEG2
-
AN
PA3
ST
CMOS
SEG3
-
AN
PA4
ST
CMOS
SEG4
-
AN
SI
ST
-
PA5
ST
CMOS
SEG5
-
AN
SO
-
CMOS
SPI serial data output
PA6
ST
CMOS
Bidirectional I/O pin with programmable pull-high and
open-drain.
SEG6
-
AN
SCK
ST
CMOS
SPI serial clock input/output
PA7
ST
CMOS
Bidirectional I/O pin with programmable pull-high and
open-drain.
SEG7
-
AN
/SS
ST
-
LCD Common 2 output
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
LCD Common 1 output
Bidirectional I/O pin with programmable pull-high, open-drain
and LED drive.
LCD Common 0 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 0 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 1 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 2 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 3 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 4 output
SPI serial data input
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 5 output
LCD Segment 6 output
LCD Segment 7 output
SPI Slave select pin
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
(Continuation)
Name
PB0/SEG8/INT4/
AD9
PB1/SEG9/INT5/
AD10
Function
Input
Type
Output
Type
PB0
ST
CMOS
SEG8
-
AN
INT4
ST
-
External interrupt pin
AD9
AN
-
ADC Input 9
PB1
ST
CMOS
SEG9
-
AN
INT5
ST
-
External interrupt pin
AD10
AN
-
ADC Input 10
PB2
ST
CMOS
-
AN
External interrupt pin
ADC Input 11
PB2/SEG10/INT6/ SEG10
AD11
INT6
PB3/SEG11/INT7
PB4/SEG16/RX
ST
-
AD11
AN
-
PB3
ST
CMOS
SEG11
-
AN
INT7
ST
-
PB4
ST
CMOS
SEG16
-
AN
RX
ST
-
Description
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 8 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 9 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 10 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 11 output
External interrupt pin
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 16 output
UART RX input
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
•7
EM78P520N
8-Bit Microprocessor with OTP ROM
(Continuation)
Function
Input
Type
Output
Type
PB5
ST
CMOS
SEG17
-
AN
TX
-
CMOS
UART TX output
PB6
ST
CMOS
Bidirectional I/O pin with programmable pull-high and
open-drain.
SEG19
-
AN
PB7
ST
CMOS
SEG20
-
AN
PC0
ST
CMOS
SEG21
-
AN
PC1
ST
CMOS
SEG22
-
AN
PC2
ST
CMOS
Xin
XTAL
-
PC3
ST
CMOS
Bidirectional I/O pin with programmable pull-high.
Xout
-
XTAL
Clock output of crystal/resonator oscillator only for 32.768kHz
OSCO
OSCO
-
XTAL
Clock output of crystal/resonator oscillator
OSCI
OSCI
XTAL
-
Clock input of crystal/resonator oscillator
VDD
VDD
Power
-
Power
VSS
VSS
Power
-
Ground
Test
Test
Power
-
Test signal import pin (must be connected to VDD)
Name
PB5/SEG17/TX
PB6/SEG19
PB7/SEG20
PC0/SEG21
PC1/SEG22
PC2/Xin
PC3/Xout
Description
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 17 output
LCD Segment 19 output
Bidirectional I/O pin with programmable pull-high and
open-drain.
LCD Segment 20 output
Bidirectional I/O pin with programmable pull-high.
LCD Segment 21 output
Bidirectional I/O pin with programmable pull-high.
LCD Segment 22 output
Bidirectional I/O pin with programmable pull-high.
Clock input of crystal/resonator oscillator only for 32.768kHz
Legend: ST : Schmitt Trigger input
AN :
XTAL : Oscillation pin for crystal/resonator
Analog pin
CMOS : CMOS output
8•
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
5
Block Diagram
P7
PC
ROM
P70
P71
P72
P73
P74
P75
P76
P77
Ext.
OSC.
PLL
ERIC
Start-up
timer
WDT
P8
Sub
OSC
Instruction
Decoder
P80
P81
P82
P83
P84
P85
P86
P87
Oscillation
Generation
8-level
stack
(13 bit)
Instruction
Register
Sub
Reset
ERIC
Timer1
(PWM1)
Timer2
(PWM2)
T1CK
T1CAP
PWM1
PWM2
Buzzy
Watch
Timer
TCC
Mux.
LVD
ALU
SPI
P9
UART
R4
P90
P91
P92
P93
P94
P95
P96
P97
ADC
RAM
ACC
R3(Status
Reg.)
Interrupt
control
circuit
LCD
8 x 23
SCK,
SDO,
SDI, /SS
Tx, Rx
ADin0~11
LCD
LVR
PA
PC0
PC1
PC2
PC3
PC
PB
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
Ext INT0~9
Figure 5 EM78P520N Block Diagram
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
•9
EM78P520N
8-Bit Microprocessor with OTP ROM
6
Function Description
6.1 Register Configuration
6.1.1 R PAGE Register Configuration
Bank 0
Bank 1
Bank 2
Bank 3
Bank 4
Bank 5
Bank 6
R0 (IAR)
R1 (TCC)
R2 (PC)
R3 (SR)
R4 (RSR)
RBSR
LCDCR
T1CR
URC
LEDDCR
Reserve
Port 7
LCDAR
TSR
URS
WBCR
LCDBR
T1PD
URRD
IOC7
P7PHCR
P7ODCR
Port 8
LCDVCR
T1TD
URTD
IOC8
P8PHCR
ADCR
IOC9
IOCA
P9PHCR
IOCB
IOCC
PAPHCR
PBPHCR
PCPHCR
PBODCR
Port C
EIESH
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
EIESL
WKCR
Reserve
Reserve
Port 9
LCDCCR
LCDSCR0
T2PD
ADICH
Port B
LCDSCR1
T2TD
ADICL
SCCR
TWTCR
IMR
LCDSCR2
Reserve
SPIS
ADDH
SPIC
ADDL
SPIR
SPIW
ISR
R10
T2CR
EISR
Reserve
LVRCR
P8ODCR
P9ODCR
Port A
EIMR
Reserve
URC2
PAODCR
‧
‧
R1F
Bank 1
R20
General Purpose RAM
.
.
.
.
.
.
Bank 7
R20
‧
‧
‧
‧
‧
‧
‧
‧
‧
R3F
‧
‧
‧
‧
‧
R3F
Figure 6-1 Data Memory Configuration
6.2 Register Operations
6.2.1 R0 (Indirect Addressing Register)
R0 is not a physically implemented register. It is used as an indirect addressing pointer.
Any instruction using R0 as register actually accesses data pointed by the RAM Select
Register (R4).
6.2.2 R1 (TCC)
R1 is incremented by the main oscillator clock (Fm) or sub oscillator clock (Fs)
(controlled by TWTCR register). It is written and read by the program as any other
register.
10 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.3 R2 (Program Counter)
The structure is depicted in Figure 6-2. Generates 8K×13 on-chip ROM addresses to
the relative programming instruction codes.
"JMP" instruction allows the direct loading of the low 10 program counter bits.
"CALL" instruction loads the low 10 bits of the PC and PC+1, and push onto the stack.
"RET'' ("RETL k", "RETI") instruction loads the program counter with the contents at the
top of the stack level.
"MOV R2, A" allows the loading of an address from the A register to the PC, and
contents of the ninth and tenth bits remain unchanged.
"ADD R2, A" allows a relative address to be added to the current PC, and the contents
of the ninth and tenth bits remain unchanged.
CALL
PC
A12 A11 A10
A9
A8
A7 ~ A0
000 PAGE0 0000~03FF
RETI
RETL
RETI
Stack 1
Stack 2
Stack 3
Stack 4
Stack 5
001 PAGE1 0400~07FF
Stack 6
Stack 7
010 PAGE2 0800~0BFF
:
:
:
:
:
:
:
:
:
Stack 8
:
:
:
111 PAGE7 1000~1F FF
Figure 6-2 Program Counter Organization
User can use the Long jump (LJMP) or long call (LCALL) instructions to program user's
code. And the program page is maintained by ELAN's compiler. It will change the
user's program by inserting instructions within the program.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 11
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.4 R3 (LVD Control and Status)
„
Status Flag, Page Select Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LVDEN
LVDS1
LVDS0
T
P
Z
DC
C
Bit 7 (LVDEN): Voltage Detect Enable Bit
0 : No action
1 : Voltage detect enabled
Bits 6~5 (LVDS1~LVDS0): Detect Voltage Select Bits
Bit 4 (T):
LVDS1
LVDS0
Detect Voltage
0
0
2.4V
0
1
2.7V
1
0
3.3V
1
1
3.9V
Time-out bit
Set to “1” by the "SLEP" and "WDTC" command, or during power up and
reset to “0” by WDT timeout.
Bit 3 (P): Power down bit
Set to “1” during power-on or by a "WDTC" command and reset to “0” by a
"SLEP" command.
Event
Bit 2 (Z):
T
P
Remarks
WDT wakes up from sleep mode
0
0
−
WDT time out (not in sleep mode)
0
1
−
/RESET wakes up from sleep
1
0
−
Power up
1
1
−
Low pulse on /RESET
×
×
× = don't care
Zero flag
Bit 1 (DC): Auxiliary carry flag
Bit 0 (C): Carry flag
12 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.5
R4 (RAM Select Register)
Bit 7 (VDB): Voltage Detector. This is a read only bit. When VDD pin voltage is lower
then Vdet (select by LVDS0~LVDS1) this bit will be cleared.
0 : low voltage is detected
1 : low voltage is not detected or LVD function is disabled
Bit 6 (BNC): Bank Control Register
0 : allow to access only Bank 0 registers
1 : Allow to access all registers of any Bank
Bits 5~0: are used to select up to 64 registers in the indirect addressing mode.
See the the data memory configuration. User can use BANK instruction to
change bank.
6.2.6
Bank 0 R5 (RAM Bank Select Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0
BS2
BS1
BS0
Bits 7~3: Reserved
Bits 2~0 (BS2~BS0): RAM Bank Select Register
BS2
BS1
BS0
RAM Bank
0
0
0
Bank 0
0
0
1
Bank 1
:
:
:
:
:
:
:
:
1
1
1
Bank 7
6.2.7
Bank 0 R7 (Port 7)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R77
R76
R75
R74
R73
R72
R71
R70
Bits 7~0 (R77~R70): 8-bit I/O Registers of Port 7.
6.2.8
Bank 0 R8 (Port 8)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R87
R86
R85
R84
R83
R82
R81
0
Bits 7~1 (R87~R81): 7-bit I/O Registers of Port 8.
Bit 0:
Reserved
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 13
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.9
Bank 0 R9 (Port 9)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R97
R96
R95
R94
R93
R92
R91
R90
Bits 7~0 (R97~R90): Port 9 8-bit I/O Registers.
6.2.10
Bank 0 RA (Port A)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RA7
RA6
RA5
RA4
RA3
RA2
RA1
RA0
Bits 7~0 (RA7~RA0): Port A 8-bit I/O Registers
6.2.11
Bank 0 RB (Port B)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
Bits 7~0 (RB7~RB0): Port B 8-bit I/O Registers
6.2.12
Bank 0 RC SCCR (System Clock Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
CLK2
CLK1
CLK0
IDLE
0
0
CPUS
Bit 7: Reserved, fixed to “0”
Bits 6~4 (CLK2~CLK0): Main Clock Select Bit for PLL Mode (code option select)
CLK2
CLK1
CLK0
Main Clock
Example Fs = 32.768kHz
0
X
X
Reserved
-
1
0
X
Reserved
-
1
1
X
Fs×488
15.99 MHz
Bit 3 (IDLE): Idle Mode Enable Bit. This bit will determine as to which mode to
activate after SLEP instruction.
IDLE=”0”+SLEP instruction → sleep mode
IDLE=”1”+SLEP instruction → idle mode
Bits 2~1: Reserved, fixed to “0”
Bit 0 (CPUS): CPU Oscillator Source Select
0 : → sub-oscillator (fs)
1 : → main oscillator (fosc)
When CPUS=0, the CPU oscillator selects the sub-oscillator and the main
oscillator is stopped.
14 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
CPU Operation Mode
Figure 6-3 CPU Operation Mode
6.2.13 Bank 0 RD TWTCR (TCC and WDT Timer Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
WDTE
WPSR2
WPSR1
WPSR0
TCCS
TPSR2
TPSR1
TPSR0
Bit 7 (WDTE): Watchdog Timer Enable. This control bit is used to enable the watchdog
timer.
0 : Disable WDT function
1 : Enable WDT function
Bits 6~4 (WPSR2~WPSR0): WDT Prescaler Bits
WPSR2
WPSR1
WPSR0
Prescaler
0
0
0
1:1 (Default)
0
0
1
1:2
0
1
0
1:4
0
1
1
1:8
1
0
0
1 : 16
1
0
1
1 : 32
1
1
0
1 : 64
1
1
1
1 : 128
Bit 3 (TCCS): TCC Clock Source Select Bit
0 : Fm (main clock)
1 : Fs (sub clock: 32.768kHz)
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 15
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 2~0 (TPSR2~TPSR0): TCC Prescaler Bits
TPSR2
TPSR1
TPSR0
Prescaler
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1:2 (Default)
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
6.2.14 Bank 0 RE IMR (Interrupt Mask Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T1IE
LVDIE
ADIE
SPIIE
URTIE
EXIE9
EXIE8
TCIE
Bits 7~0 (T1IE~TCIE): Interrupt Enable Bit. Enable the interrupt source.
0 : Disable interrupt
1 : Enable interrupt
External Interrupt
INT Pin
Secondary
Function Pin
Enable Condition
Edge
Digital Noise
Reject
INT8
P82, AD8
ENI+EXIE8 (IMR1)
Rising or Falling
2/Fc
INT9
P83, COM7, AD7
ENI+EXIE9 (IMR2)
Rising or Falling
2/Fc
INT8~INT9:
Pulse less than 2/Fc is eliminated as noise. Pulse more than 4/Fc is
treated as a trigger signal.
6.2.15 Bank 0 RF ISR (Interrupt Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T1IF
LVDIF
ADIF
SPIIF
URTIF
EXIF9
EXIF8
TCIF
These bits are set to “1” when interrupt occurs.
Bit 7 (T1IF):
Interrupt Flag of Timer 1 Interrupt
Bit 6 (LVDIF): Interrupt Flag of Low Voltage Detector Interrupt
Bit 5 (ADIF): Interrupt Flag of A/D Conversion Completed
Bit 4 (SPIIF): Interrupt Flag of SPI Transfer Completed
Bit 3 (URTIF): Interrupt Flag of UART Transfer Completed
Bit 2 (EXIF9): Interrupt Flag of External Interrupt 9 occurs
Bit 1 (EXIF8): Interrupt Flag of External Interrupt 8 occurs
Bit 0 (TCIF): Interrupt Flag of TCC overflow
16 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.16
Bank 1 R5 LCDCR (LCD Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LCDEN
LCDTYPE
BS1
BS0
DS1
DS0
LCDF1
LCDF0
Bit 7 (LCDEN): LCD Enable Select Bit
0 : LCD disabled. All common/segment outputs are set to VDD level.
1 : LCD enabled
Bit 6 (LCDTYPE): LCD Drive Waveform Type Select Bit
0 : A type wave
1 : B type wave
Bits 5~4 (BS1~BS0): LCD Bias Select Bits
BS1
BS0
LCD Bias Select
0
0
1/2 Bias
0
1
1/3 Bias
1
×
1/4 Bias
Bits 3~2 (DS1~DS0): LCD Duty Select Bits
DS1
DS0
LCD Duty
0
0
Static
0
1
1/3 Duty
1
0
1/4 Duty
1
1
1/8 Duty
Bits 1~0 (LCDF1~LCDF0): LCD Frame Frequency Control Bits
LCD Frame Frequency (e.q. Fs=32.768K)
LCDF1 LCDF0
Static
1/3 Duty
1/4 Duty
1/8 Duty
0
0
Fs/(512×1) = 64.0
Fs/(172×3) =63.5
Fs/(128×4) = 64
Fs/(64×8) = 64.0
0
1
Fs/(560×1) = 58.5
Fs/(188×3) = 58
Fs/(140×4) = 58.5
Fs/(70×8) = 58.5
1
0
Fs/(608×1) = 53.9
Fs/(204×3) = 53.5 Fs/(152×4) = 53.9
Fs/(76×8) = 53.9
1
1
Fs/(464×1) = 70.6
Fs/(156×3) = 70
Fs/(58×8) = 70.6
6.2.17
Fs/(116×4) = 70.6
Bank 1 R6 LCDAR (LCD Address Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
LCD_A4
LCD_A3
LCD_A2
LCD_A1
LCD_A0
Bits 7~5: Reserved
Bits 4~0 (LCD_A4~LCD_A0): LCD RAM Address
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 17
EM78P520N
8-Bit Microprocessor with OTP ROM
R7 (LCD Data Buffer)
R6
Segment
(LCD
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Address) (LCD_D7) (LCD_D6) (LCD_D5) (LCD_D4) (LCD_D3) (LCD_D2) (LCD_D1) (LCD_D0)
00H
SEG0
01H
SEG1
02H
SEG2
|
|
14H
SEG20
15H
SEG21
16H
SEG22
Common
COM7
COM6
6.2.18
COM5
COM4
COM3
COM2
COM1
COM0
Bank 1 R7 LCDBR (LCD Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LCD_D7
LCD_D6
LCD_D5
LCD_D4
LCD_D3
LCD_D2
LCD_D1
LCD_D0
Bit 7~0 (LCD_D7~LCD_D0): LCD RAM Data Transfer Register
6.2.19
Bank 1 R8 LCDVCR (LCD Voltage Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
LCDC1
LCDC0
LCDVC2
LCDVC1
LCDVC0
Bits 7~5: Reserved
Bits 4~3 (LCDC1~LCDC0): LCD Clock
LCDC1
LCDC0
Fm
FLCD
0
0
16M
Fc/29
0
1
8M
Fc/28
1
0
4M
Fc/27
1
1
2M
Fc/26
When the main oscillator operates in crystal mode and the sub-oscillator does
not, it is a must to set these two bits for the LCD clock.
18 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 2~0 (LCDVC2~LCDVC0): LCD Voltage Control Bits
LCDVC2
LCDVC1
LCDVC0
Output
0
0
0
0.4VDD ~ VDD
0
0
1
0.34VDD ~ VDD
0
1
0
0.26VDD ~ VDD
0
1
1
0.18VDD ~ VDD
1
0
0
0.13VDD ~ VDD
1
0
1
0.07VDD ~ VDD
1
1
0
0.04VDD ~ VDD
1
1
1
0V ~ VDD
6.2.20
Bank 1 R9 LCDCCR (LCD COM Control Register 3)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
COM7
COM6
COM5
COM4
COM3
COM2
COM1
COM0
Bits 7~0 (COM7~COM0): LCD Com 7~0 Control Bits
0 : Disable, functions as normal I/O or other functions
1 : Enable, functions as LCD common driver pins
6.2.21
Bank 1 RA LCDSCR0 (LCD Segment Control Register 0)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
Bits 7~0 (SEG7~SEG0): LCD Segments 7~0 Control Bits
0 : Disable, functions as normal I/O or other functions
1 : Enable, functions as LCD common driver pins
6.2.22
Bank 1 RB LCDSCR1 (LCD Segment Control Register 1)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
Bits 7~0 (SEG15~SEG8): LCD Segments 15~8 Control Bits
0 : Disable, functions as normal I/O or other functions
1 : Enable, functions as LCD common driver pins
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 19
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.23
Bank 1 RC LCDSCR2 (LCD Segment Control Register 2)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
Bit 7: Reserved
Bits 6~0 (SEG22~SEG16): LCD Segment 22~16 Control Bits
0 : Disable, functions as normal I/O or other functions
1 : Enable, functions as LCD common driver pins
6.2.24
Bank 1 RE EIMR (External Interrupt Mask Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
EXIE7
EXIE6
EXIE5
EXIE4
EXIE3
EXIE2
EXIE1
EXIE0
Bits 7~0 (EXIE7~EXIE0): Interrupt Enable Bit. Enable interrupt source respectively.
External interrupt
INT Pin Secondary Function Pin
Enable Condition
Edge
Digital Noise
Reject
INT7
PB3, SEG11
ENI+EXIE7 (EIMR7)
Rising or Falling
2/Fc
INT6
PB2, SEG10, AD11
ENI+EXIE6 (EIMR6)
Rising or Falling
2/Fc
INT5
PB1, SEG9, AD10
ENI+EXIE5 (EIMR5)
Rising or Falling
2/Fc
INT4
PB0, SEG8, AD9
ENI+EXIE4 (EIMR4)
Rising or Falling
2/Fc
INT3
P77, T1CAP
ENI+EXIE3 (EIMR3)
Rising or Falling
2/Fc
INT2
P76, T1CK
ENI+EXIE2 (EIMR2)
Rising or Falling
2/Fc
INT1
P75, T1OUT, PWM1
ENI+EXIE1 (EIMR1)
Rising or Falling
2/Fc
INT0
P74, SEG18
ENI+EXIE0 (EIMR0)
Rising or Falling
2/Fc
INT7~INT0: Pulse less than 2/Fc is eliminated as noise. Pulse more than 4/Fc is
treated as a trigger signal.
6.2.25
Bank 1 RF EISR (External Interrupt Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
EXIF7
EXIF6
EXIF5
EXIF4
EXIF3
EXIF2
EXIF1
EXIF0
These bits are set to “1” when interrupt occurs.
Bits 7~0 (EXIF7~EXIF0): Interrupt Flag when External Interrupt 7~0 occur
20 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.26 Bank 2 R5 T1CR (Timer 1 Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TIS1
TIS0
T1MS2
T1MS1
T1MS0
T1P2
T1P1
T1P0
Bits 7~6 (TIS1~ TIS0): Timer 1 and Timer 2 Interrupt Type Select Bits. These two bits
are used when the Timer operates in PWM mode.
TIS1
TIS0
Timer 1 and Timer 2 Interrupt Type Select
0
0
TXPD underflow
0
1
TXTD underflow
1
×
TXPD and TXTD underflow
Bits 5~3 (T1MS2~T1MS0): Timer 1 Operation Mode Select Bits
T1MS2
T1MS1
T1MS0
Timer 1 Mode Select
0
0
0
Timer 1
0
0
1
T1OUT Mode
0
1
0
Capture Mode Rising Edge
0
1
1
Capture Mode Falling Edge
1
0
0
UART Baud Rate Generator
1
0
1
1
1
0
1
1
1
PWM 1
Bits 2~0 (T1P2~T1P0): Timer 1 Prescaler Bits
T1P2
T1P1
T1P0
Prescaler
0
0
0
1:2 (Default)
0
0
1
1:4
0
1
0
1:8
0
1
1
1 : 16
1
0
0
1 : 32
1
0
1
1 : 64
1
1
0
1 : 128
1
1
1
1 : 256
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 21
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.27
Bank 2 R6 TSR (Timer Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T1MOD
TRCB
T1CSS1
T1CSS0
T2CSS
T1S
T1OMS
T1OC
Bit 7 (T1MOD): Timer Operation Mode Select Bit
0 : Two 8-bit Timers
1 : Timer 1 and Timer 2 cascaded to one 16-bit Timer
NOTE
By setting T1MOD to “1”, Timer can cascade to one 16-bit Timer. This 16-bit Timer is
controlled by Timer 1, including enable, clock source and prescaler. Timer 1 is MSB
and Timer 2 is LSB in value of period and duty.
Bit 6 (TRCB): Timers 1, 2 Read Control Bit
0 : When this bit is set to 0, read data from T1PD or T2PD.
1 : When this bit is set to 1, read data from T1PD or T2PD, but this is a
value of the timer counter.
Bits 5~4 (T1CSS1~T1CSS0): Timer 1 Clock Source Select Bits
T1CSS1
T1CSS0
Timer 1 Clock Source Select
0
0
Fm
0
1
Fs
1
×
T1CK
Bit 3 (T2CSS): Timer 2 Clock Source Select Bit
0 : Main clock with prescaler
1 : Sub clock with prescaler
Bit 2 (T1S):
Timer 1 Start Bit
0 : Timer 1 stop
1 : Timer 1 start
Bit 1 (T1OMS): Timer 1 Output Mode Select Bit
0 : Repeating mode
1 : One–shot mode
NOTE
One-shot mode is only used in Timer 1, Capture and PWM1 modes.
22 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Mode Selected
Description
Timer 1
Down-counter will underflow once and cannot auto reload from
T1PD.
Capture
In this mode, period and duty of the T1CAP input pin are measured
once. This moment free running counter stop and can’t detect a
change of T1CAP edge.
PWM1
In this mode the microcontroller device will generate one set of
PWM1’s duty and period, and then free running counter will stop.
Bit 0 (T1OC): Timer 1 Output Flip-Flop Control Bit
0 : T-FF is low
1 : T-FF is high
6.2.28 Bank 2 R7 T1PD (Timer 1 Period Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PRD1[7]
PRD1[6]
PRD1[5]
PRD1[4]
PRD1[3]
PRD1[2]
PRD1[1]
PRD1[0]
Bits 7~0 (PRD1 [7]~PRD1 [0]): The content of this register is a period of Timer 1.
6.2.29 Bank 2 R8 T1TD (Timer 1 Duty Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TD1[7]
TD1[6]
TD1[5]
TD1[4]
TD1[3]
TD1[2]
TD1[1]
TD1[0]
Bits 7~0 (TD1 [7]~TD1 [0]): The content of this register is a duty of Timer 1.
6.2.30 Bank 2 R9 T2CR (Timer 2 Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T2IF
T2IE
T2S
T2MS1
T2MS0
T2P2
T2P1
T2P0
Bit 7 (T2IF): Interrupt Flag of Timer 2 Interrupt
Bit 6 (T2IE): Timer 2 Interrupt Mask Bit
0 : Disable Timer 2 interrupt
1 : Enable Timer 2 interrupt
Bit 5 (T2S):
Timer 2 Start Bit
0 : Timer 2 stop
1 : Timer 2 start
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 23
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 4~3 (T2MS1~T2MS0): Timer 2 Operation Mode Select Bits
T2MS1
T2MS0
Timer 2 Mode Select
0
0
Timer 2
0
1
SPI Baud Rate Generator
1
0
1
1
PWM 2
Bits 2~0 (T2P2~T2P0): Timer 2 Prescaler Bits
T2P2
T2P1
T2P0
Prescaler
0
0
0
1:2 (Default)
0
0
1
1:4
0
1
0
1:8
0
1
1
1 : 16
1
0
0
1 : 32
1
0
1
1 : 64
1
1
0
1 : 128
1
1
1
1 : 256
6.2.31 Bank 2 RA T2PD (Timer 2 Period Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PRD2[7]
PRD2[6]
PRD2[5]
PRD2[4]
PRD2[3]
PRD2[2]
PRD2[1]
PRD2[0]
Bits 7~0 (PRD2 [7]~PRD2 [0]): The content of this register is a period of Timer 2.
6.2.32 Bank 2 RB T2TD (Timer 2 Duty Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TD2[7]
TD2[6]
TD2[5]
TD2[4]
TD2[3]
TD2[2]
TD2[1]
TD2[0]
Bits 7~0 (TD2 [7]~TD2 [0]): The content of this register is a duty of Timer 2.
6.2.33 Bank 2 RC SPIS (SPI Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DORD
TD1
TD0
0
OD3
OD4
0
RBF
Bit 7 (DORD): Data Shift Control Bit
0 : Shift left (MSB first)
1 : Shift right (LSB first)
24 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 6~5 (TD1~TD0): SDO Status Output Delay Times Options
TD1
TD0
Delay Time
0
0
8 CLK
0
1
16 CLK
1
0
24 CLK
1
1
32 CLK
Bit 4:
Reserved
Bit 3 (OD3): Open-Drain Control Bit
0 : Open-drain disable for SDO
1 : Open-drain enable for SDO
Bit 2 (OD4): Open-Drain Control bit
0 : Open-drain disable for SCK
1 : Open-drain enable for SCK
Bit 1:
Reserved
Bit 0 (RBF): Read Buffer Full Flag
0 : Receiving not completed, and SPIRB has not fully exchanged.
1 : Receiving completed, and SPIRB is fully exchanged.
6.2.34 Bank 2 RD SPIC (SPI Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CES
SPIE
SRO
SSE
SDOC
SBRS2
SBRS1
SBRS0
Bit 7 (CES): Clock Edge Select Bit
0 : Data shift out on rising edge, and shifts in on a falling edge. Data is on
hold during low-level.
1 : Data shift out falling edge, and shift in on a rising edge. Data is on hold
during high-level.
Bit 6 (SPIE): SPI Enable Bit
0 : Disable SPI mode
1 : Enable SPI mode
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 25
EM78P520N
8-Bit Microprocessor with OTP ROM
Bit 5 (SRO): SPI Read Overflow Bit
0 : No overflow
1 : A new data is received while the previous data is still being held in the
SPIRB register. In this situation, the data in SPIS register will be
destroyed. To avoid setting this bit, user is required to read the SPIRB
register although only transmission is implemented. This can only
occur in slave mode.
Bit 4 (SSE):
SPI Shift Enable Bit
0 : Reset as soon as the shift is complete, and the next byte is read to
shift.
1 : Start to shift, and remain on “1” while the current byte is still being
transmitted.
Bit 3 (SDOC): SDO Output Status Control Bit
0 : After a serial data output, the SDO remains high.
1 : After a serial data output, the SDO remains low.
Bits 2~0 (SBRS2~SBRS0): SPI Baud Rate Select Bits
SBRS2
SBRS1
SBRS0
Mode
0
0
0
Master
SPI Baud Rate
Fosc/2
0
0
1
Master
Fosc/4
0
1
0
Master
Fosc/8
0
1
1
Master
Fosc/16
1
0
0
Master
Fosc/32
1
0
1
Master
Timer 2
1
1
0
Slave
/SS enable
1
1
1
Slave
/SS disable
6.2.35 Bank 2 RE SPIR (SPI Read Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SRB7
SRB6
SRB5
SRB4
SRB3
SRB2
SRB1
SRB0
Bits 7~0 (SRB7~SRB0): SPI Read Data Buffer
6.2.36 Bank 2 RF SPIW (SPI Write Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SWB7
SWB6
SWB5
SWB4
SWB3
SWB2
SWB1
SWB0
Bits 7~0 (SWB7~SWB0): SPI Write Data Buffer
26 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.37 Bank 3 R5 URC (UART Control Register)
Bit 7
URTD8
Bit 6
Bit 5
UMODE1 UMODE0
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BRATE2
BRATE1
BRATE0
UTBE
TXE
Bit 7 (URTD8): Transmission Data Bit 8
Bits 6~5 (UMODE1~UMODE0): UART Transmission Mode Select Bit
UMODE1 UMODE0
UART Mode
0
0
Mode 1 : 7-Bit
0
1
Mode 2 : 8-Bit
1
0
Mode 3 : 9-Bit
1
1
Reserved
Bits 4~2 (BRATE2~BRATE0): Transmit Baud Rate Select (TUART=Fc/16)
BRATE2
BRATE1
BRATE0
Baud Rate
e.g. Fc = 8 MHz
0
0
0
TUART/13
38400
0
0
1
TUART/26
19200
0
1
0
TUART/52
9600
0
1
1
TUART/104
4800
1
0
0
TUART/208
2400
1
0
1
TUART/416
1200
1
1
0
Timer 1
1
1
1
Reserved
Bit 1 (UTBE): UART transfer buffer empty flag. Set to 1 when transfer buffer is empty.
Reset to 0 automatically when writing to the URTD register. The UTBE
bit will be cleared by hardware when transmission is enabled. The
UTBE bit is read-only. Hence, writing to the URTD register is
necessary to start transmit shifting.
Bit 0 (TXE):
Enable transmission
0 : Disable
1 : Enable
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 27
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.38
Bank 3 R6 URS (UART Status)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
URRD8
EVEN
PRE
PRERR
OVERR
FMERR
URBF
RXE
Bit 7 (URRD8): Receiving Data Bit 8
Bit 6 (EVEN): Select Parity Check
0 : Odd parity
1 : Even parity
Bit 5 (PRE):
Enable Parity Addition
0 : Disable
1 : Enable
Bit 4 (PRERR): Parity Error Flag
Set to “1” when parity error occurs and clear to “0” by software.
Bit 3 (OVERR): Over Running Error Flag
Set to ”1” when overrun error occurs and clear to “0” by software.
Bit 2 (FMERR): Framing Error Flag
Set to “1” when framing error occurs and clear to “0” by software.
Bit 1 (URBF): UART Read Buffer Full Flag
Set to “1” when one character is received. Reset to “0” automatically
when read from URS register. The URBF will be cleared by hardware
when enabling receiving. The URBF bit is read-only. Therefore,
reading the URS register is necessary to avoid overrun error.
Bit 0 (RXE):
Enable Receiving
0 : Disable
1 : Enable
6.2.39
Bank 3 R7 URRD (UART_RD Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
URRD7
URRD6
URRD5
URRD4
URRD3
URRD2
URRD1
URRD0
Bits 7~0 (URRD7~URRD0): UART Receive Data Buffer. Read only.
28 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.40 Bank 3 R8 URTD (UART_TD Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
URTD7
URTD6
URTD5
URTD4
URTD3
URTD2
URTD1
URTD0
Bits 7~0 (URTD7~URTD0): UART Transmit Data Buffer. Write only.
6.2.41
Bank 3 R9 ADCR (A/D Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ADRUN
ADP
ADCK1
ADCK0
ADIS3
ADIS2
ADIS1
ADIS0
Bit 7 (ADRUN): AD Conversion Start
0 : Reset on completion of the conversion by hardware, this bit cannot
be reset by software.
1 : Conversion starts
A/D Power Control
Bit 6 (ADP):
Bits 5~4 (ADCK1~ADCK0): AD Conversion Time Select Bits
ADCK1
ADCK0
Clock Source
Max. Operating Frequency (Fc)
0
0
Fc/4
1 MHz
0
1
Fc/16
4 MHz
1
0
Fc/32
8 MHz
1
1
Fc/64
16 MHz
Bits 3~0 (ADIS3~ADIS0): A/D Input Select Bits
ADIS3
ADIS2
ADIS1
ADIS0
Analog Input Pin
0
0
0
0
AD0
0
0
0
1
AD1
0
0
1
0
AD2
0
0
1
1
AD3
0
1
0
0
AD4
0
1
0
1
AD5
0
1
1
0
AD6
0
1
1
1
AD7
1
0
0
0
AD8
1
0
0
1
AD9
1
0
1
0
AD10
1
0
1
1
AD11
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 29
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.42
Bank 3 RA ADICH (A/D Input Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CALI
ADREF
0
0
ADE11
ADE10
ADE9
ADE8
Bit 7 (CALI):
Calibration Enable Bit for A/D Offset
0 : Disable Calibration
1 : Enable Calibration
Bit 6 (ADREF): AD Reference Voltage Input Select
0 : Internal VDD, P84 is used as I/O.
1 : External reference pin, P84 is used as reference input pin.
External VREF is accuracy better than internal VDD.
Reserved
Bits 5~4:
Bits 3~0 (ADE11~ADE8): AD Input Pin Enable Control
0 : Functions as I/O pin
1 : Functions as analog input pin
6.2.43
Bank 3 RB ADICL (A/D Input Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ADE7
ADE6
ADE5
ADE4
ADE3
ADE2
ADE1
ADE0
Bits 7~0 (ADE7~ADE0): AD input pin enable control
0 : Functions as I/O pin
1 : Functions as analog input pin
6.2.44 Bank 3 RC ADDH (AD High 8-bit Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ADD11
ADD10
ADD9
ADD8
ADD7
ADD6
ADD5
ADD4
Bits 7~0 (ADD11~ADD4): AD High 8-Bit Data Buffer
6.2.45
Bank 3 RD ADDL (AD Low 4-bit Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SIGN
VOF[2]
VOF[1]
VOF[0]
ADD3
ADD2
ADD1
ADD0
Bit 7 (SIGN):
Polarity Bit of Offset Voltage
0 : Negative voltage
1 : Positive voltage
30 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 6~4 (VOF[2]~VOF[0]): Offset Voltage Bits
VOF[2]
VOF[1]
VOF[0]
EM78P520N
0
0
0
0LSB
0
0
1
2LSB
0
1
0
4LSB
0
1
1
6LSB
1
0
0
8LSB
1
0
1
10LSB
1
1
0
12LSB
1
1
1
14LSB
Bits 3~0 (ADD3~ADD0): AD Low 4-Bit Data Buffer
6.2.46 Bank 3 RE EIESH (External Interrupt Edge Select High Byte
Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
EIES7
EIES6
EIES5
EIES4
EIES3
EIES2
EIES1
EIES0
Bits 7~0 (EIES7~EIES0): External Interrupt 7~0 Edge Select Bit
0 : Falling edge interrupt
1 : Rising edge interrupt
6.2.47 Bank 3 RF EIESL (External Interrupt Edge Select Low Byte
Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
ADWK
INTWK9
INTWK8
EIES9
EIES8
Bits 7~5:
Reserved
Bit 4 (ADWK): A/D Converter Wake-up Function Enable Bit
0 : Disable
1 : Enable
Bits 3~2 (INTWK9~INTWK8): External Interrupt 9~8 Wake-up Function Enable Bit
0 : Disable
1 : Enable
Bits 1~0 (EIES9~EIES8): External Interrupt 9~8 Edge Select Bit
0 : Falling edge interrupt
1 : Rising edge interrupt
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 31
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.48 Bank 4 R5 LEDDCR (LED Drive Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LEDD7
LEDD6
LEDD5
LEDD4
LEDD3
LEDD2
LEDD1
LEDD0
Bits 7~0 (LEDD7~LEDD0): 8-bit LED Drive Control Registers
0 : Port 9 functions as normal I/O
1 : Port 9 functions as LED direct drive I/O
6.2.49 Bank 4 R6 WBCR (Watch Timer and Buzzer Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
WTCS
WTIE
WTIF
WTSSB1
WTSSB0
BUZE
BSSB1
BSSB0
Bit 7 (WTCS): Watch Timer and Buzzer Clock Source Select Bit
0 : Main Clock divided by 256
1 : Sub clock
Bit 6 (WTIE): Watch Timer Enable Bit and Interrupt Mask
0 : Disable
1 : Enable
Bit 5 (WTIF): Watch Timer Interrupt Flag
Bits 4~3 (WTSSB1~ WTSSB0): Watch Timer Interval Select Bits
WTSSB1
WTSSB0
Timer Interval Select
(WTCS=1)
Fm=8 MHz (WTCS=0)
0
0
1.0S
1.0S
0
1
0.5S
0.5S
1
0
0.25S
0.25S
1
1
3.91ms
3.91ms
Bit 2 (BUZE): Buzzer Enable and Port 91 as Buzzer Output Pin
0 : No action
1 : Enable buzzer output
Bits 1~0 (BSSB1~BSSB0): Buzzer Output Frequency Select Bits
32 •
BSSB1
BSSB0
Buzzer Signal Select
(WTCS=1)
Fm=8 MHz (WTCS=0)
0
0
0.5kHz
0.5kHz
0
1
1kHz
1kHz
1
0
2kHz
2kHz
1
1
4kHz
4kHz
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.50 Bank 4 R7 P7IOCR (Port 7 I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOC77
IOC76
IOC75
IOC74
IOC73
IOC72
IOC71
IOC70
Bits 7~0 (IOC77~IOC70): Port 7 8-Bit I/O Direction Control Registers
0 : Define Port 7 as output port
1 : Define Port 7 as input port
6.2.51 Bank 4 R8 P8IOCR (Port 8 I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOC87
IOC86
IOC85
IOC84
IOC83
IOC82
IOC81
0
Bits 7~1 (IOC87~IOC81): Port 8 7-Bit I/O Direction Control Registers
0 : Define Port 8 as output port
1 : Define Port 8 as input port
Bit 0:
Reserved
6.2.52 Bank 4 R9 P9IOCR (Port 9 I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOC97
IOC96
IOC95
IOC94
IOC93
IOC92
IOC91
IOC90
Bits 7~0 (IOC97~IOC90): Port 9 8-Bit I/O Direction Control Registers
0 : Define Port 9 as output port
1 : Define Port 9 as input port
6.2.53 Bank 4 RA PAIOCR (Port A I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOCA7
IOCA6
IOCA5
IOCA4
IOCA3
IOCA2
IOCA1
IOCA0
Bits 7~0 (IOCA7~IOCA0): Port A 8-Bit I/O Direction Control Registers
0 : Define Port A as output port
1 : Define Port A as input port
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 33
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.54 Bank 4 RB PBIOCR (Port B I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOCB7
IOCB6
IOCB5
IOCB4
IOCB3
IOCB2
IOCB1
IOCB0
Bits 7~0 (IOCB7~IOCB0): Port B 8-Bit I/O Direction Control Registers
0 : Define Port B as output port
1 : Define Port B as input port
6.2.55 Bank 4 RC PCIOCR (Port C I/O Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
1
1
1
IOCC3
IOCC2
IOCC1
IOCC0
Bits 7~4: Reserved
Bits 3~0 (IOCC3~IOCC0): Port C 4-Bit I/O Direction Control Registers
0 : Define Port C as output port
1 : Define Port C as input port
6.2.56 Bank 4 RF WKCR (Wake-up Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
INTWK7
INTWK6
INTWK5
INTWK4
INTWK3
INTWK2
INTWK1
INTWK0
Bits 7~0 (INTWK7~INTWK0): External Interrupt 7~0 Wake-up Function Enable Bit
0 : Disable
1 : Enable
6.2.57 Bank 5 R6 UARC2 (UART Control Register 2)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
UARTE
0
UINVEN
0
0
0
Bits 7~6: Reserved
Bit 5 (UARTE): UART Function Enable
0 : UART functions disable. PB4, PB5 as general I/O
1 : UART functions enable. PB4, PB5 as UART Rx, Tx pin
Bit 4:
Reserved
Bit 3 (UINVEN): Enable UART TX and Rx Port Inverse Output
0 : Disable Tx and Rx port inverse output
1 : Enable Tx and Rx port inverse output
Bits 2~0: Reserved
34 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.58
Bank 5 R7 P7PHCR (Port 7 Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PH77
PH76
PH75
PH74
PH73
PH72
PH71
PH70
Bits 7~0 (PH77~PH70): Port 7 8-Bit I/O Pull High Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
6.2.59
Bank 5 R8 P8PHCR (Port 8 Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PH87
PH86
PH85
PH84
PH83
PH82
PH81
0
Bits 7~1 (PH87~PH81): PORT 8 7-Bit I/O Pull High Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
Bit 0:
Reserved
6.2.60
Bank 5 R9 P9PHCR (Port 9 Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PH97
PH96
PH95
PH94
PH93
PH92
PH91
PH90
Bits 7~0 (PH97~PH90): Port 9 8-bit I/O Pull-high Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
6.2.61
Bank 5 RA PAPHCR (Port A Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PHA7
PHA6
PHA5
PHA4
PHA3
PHA2
PHA1
PHA0
Bits 7~0 (PHA7~PHA0): Port A 8-bit I/O Pull-high Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 35
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.62 Bank 5 RB PBPHCR (Port B Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PHB7
PHB6
PHB5
PHB4
PHB3
PHB2
PHB1
PHB0
Bits 7~0 (PHB7~PHB0): Port B 8-Bit I/O Pull-high Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
6.2.63 Bank 5 RC PCPHCR (Port C Pull High Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
PHC3
PHC2
PHC1
PHC0
Bits 7~4: Reserved
Bits 3~0 (PHC3~PHC0): Port C 4-Bit I/O Pull-high Control Registers
0 : Disable Pull-high
1 : Enable Pull-high
6.2.64 Bank 6 R6 LVRCR (Low Voltage Reset Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0
LVREN
LVRS1
LVRS0
R6 uses only ICE520 simulator.
Bits 7~3: Reserved
Bit 2 (LVREN): Low Voltage Reset Enable Bit
0 : Disable
1 : Enable
Bits 1~0 (LVRS1~LVRS0): Low Voltage Reset Voltage Select Bits
LVRS1
LVRS0
Reset Voltage
0
0
2.6V
0
1
3.3V
1
0
3.9V
6.2.65 Bank 6 R7 P7ODCR (Port 7 Open Drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
OD77
OD76
OD75
OD74
OD73
OD72
OD71
OD70
Bits 7~0 (OD77~OD70): Port 7 8-Bit I/O Open Drain Control Registers
0 : Disable Open drain
1 : Enable Open drain
36 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.2.66
Bank 6 R8 P8ODCR (Port 8 Open Drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
OD87
OD86
OD85
OD84
OD83
OD82
OD81
0
Bits 7~1 (OD87~OD80): Port 8 7-bit I/O Open Drain Control Registers
0 : Disable Open drain
1 : Enable Open drain
Bit 0:
Reserved
6.2.67
Bank 6 R9 P9ODCR (Port 9 Open Drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
OD97
OD96
OD95
OD94
OD93
OD92
OD91
OD90
Bits 7~0 (OD97~OD90): Port 9 8-Bit I/O Open Drain Control Registers
0 : Disable Open drain
1 : Enable Open drain
6.2.68
Bank 6 RA PAODCR (Port A Open Drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ODA7
ODA6
ODA5
ODA4
ODA3
ODA2
ODA1
ODA0
Bits 7~0 (ODA7~ODA0): Port A 8-Bit I/O Open Drain Control Registers
0 : Disable Open drain
1 : Enable Open drain
6.2.69
Bank 6 RB PBODCR (Port B Open Drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ODB7
ODB6
ODB5
ODB4
ODB3
ODB2
ODB1
ODB0
Bits 7~0 (ODB7~ODB0): Port B 8-Bit I/O Open Drain Control Registers
0 : Disable Open drain
1 : Enable Open drain
6.2.70
Bank 6 RC (Port C)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
1
1
1
RC3
RC2
RC1
RC0
Bits 7~4: Reserved
Bits 3~0 (RC3~RC0): Port C 4-Bit I/O Registers
6.2.71
R10~R3F (General Purpose Register)
R10~R1F and R20~R3F (Banks 0~7) are general purpose registers.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 37
EM78P520N
8-Bit Microprocessor with OTP ROM
6.3 TCC/WDT Prescaler
Registers for the TCC/WDT Circuit
R_BANK Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
WDTE WPSR2 WPSR1 WPSR0 TCCS
Bank 0
0X0D
TWTCR
Bank 0
0x0E
IMR
Bank 0
0x0F
ISR
R/W
T1IE
R/W
R/W
R/W
LVDIE ADIE
R/W
R/W
R/W
T1IF
LVDIF
ADIF
R/W
R/W
R/W
R/W
Bit 2
Bit 1
TPSR2 TPSR1 TPSR0
R/W
R/W
SPIIE URTIE EXIE9 EXIE8
R/W
R/W
R/W
R/W
SPIIF URTIF EXIF9 EXIF8
R/W
R/W
Bit 0
R/W
R/W
R/W
TCIE
R/W
TCIF
R/W
There are two 8-bit counters available as prescalers for the TCC and WDT, respectively.
The TPSR0~TPSR2 bits of the Bank 0 RD (TWTCR) register are used to determine the
ratio of the TCC prescaler. Likewise, the WPSR0~WPSR2 bits of the Bank 0 RD
(TWTCR) register are used to determine the WDT prescaler. The prescaler counter will
be cleared by the instructions each time they are written into TCC. The WDT and
prescaler will be cleared by the “WDTC” and “SLEP” instructions. Figure 6-4 depicts the
circuit diagram of TCC/WDT.
R1 (TCC) is an 8-bit timer/counter. The TCC clock source can be internal clock main
clock or sub clock (32.768kHz). If TCC signal source is from the internal clock, TCC will
be incremented by 1 at every instruction cycle (without prescaler). As illustrated in
Figure 6-4. The watchdog timer is a free running on-chip RC oscillator. The WDT will
continue running even after the oscillator driver has been turned off (i.e. in sleep mode).
During normal operation or sleep mode, a WDT time-out (if enabled) will cause the
device to reset. The WDT can be enabled or disabled at any time during the normal
mode by software programming. Refer to WDTE bit of Bank 0 RD (TWTCR) register.
With no prescaler, the WDT time-out period is approximately 18 ms1.
1
38 •
Note: VDD=5V, Setup time period = 16.5ms ± 30%
VDD=3V, Setup time period = 18ms ± 30%
Setup time form the WDT.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Figure 6-4 TCC/WDT Block Diagram
6.4 I/O Port
Registers for I/O Circuit
R_BANK
Address
Name
Bank 4 0X07~0X0C PIOCR
Bank 5 0X07~0X0C PHCR
Bank 6 0X07~0X0B ODCR
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IOC7
IOC6
IOC5
IOC4
IOC3
IOC2
IOC1
IOC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
OD7
OD6
OD5
OD4
OD3
OD2
OD1
OD0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The I/O registers, (Port 7, Port 8, Port 9, Port A, Port B and Port C), are bidirectional
tri-state I/O ports. All pins are pulled-high internally by software. Likewise, Port 7,
Port 8, Port 9, Port A, Port B and Port C, can also have open-drain output through
software. Port 7 [7:4], Port B [3:0] and Port 8 [3:2] provides an input status changed
interrupt (or wake-up) function and is pulled-high by software. Each I/O pin can be
defined as "input" or "output" pin by the I/O control register Bank 4 R7 ~ RC. The I/O
registers and I/O control registers are both readable and writeable. The I/O interface
circuits are shown in Figure 6-5.
The I/O cannot be set to pull-high and output low at the same time. It can relatively
increase the power consumption.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 39
EM78P520N
8-Bit Microprocessor with OTP ROM
Note: Open-drain is not shown in the figure.
Figure 6-5 Circuits of I/O Port and I/O Control Register for Ports 7~9, and Ports A~C
6.5 Reset and Wake-up
A reset can be caused by:
„
Power-on reset
„
WDT timeout (if enabled)
„
LVR Reset (if enabled)
„
RESET pin pulling low
NOTE
The power-on reset circuit is always enabled, it will reset the CPU at 2.3V and power
consumption is 0.5 µA.
Once a reset occurs, the following functions are performed:
40 •
„
The oscillator is running, or will be started.
„
The Program Counter (R2) is set to all "0".
„
All I/O port pins are configured as input mode (high-impedance state).
„
The TCC/Watchdog timer and prescaler are cleared.
„
When power is on, all bits of R5 and R6 are cleared.
„
The other registers are described in Table 2
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Table 2 Summary of the Registers Initial Values
Address
0×00
0×01
0×02
Name
R0
IAR
R1
TCC
R2
PC
Reset Type
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
-
-
-
-
-
-
-
-
Power-on
U
U
U
U
U
U
U
U
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
Bit Name
R3
0×03
LVD &
SR
0×04
R4
RSR
Bank 0
0×05
R5
RBSR
Bank 0
0×07
R7
Port 7
Bank 0
0×08
R8
Port 8
Continue to execute next instruction
T
P
Z
DC
C
Power-on
LVDEN LVDS1 LVDS0
0
0
0
1
1
U
U
U
/RESET and WDT
0
0
0
t
t
P
P
P
Wake-up from Sleep and
Idle mode
P
P
P
t
t
P
P
P
Bit Name
VDB
BNC
X
X
X
X
X
X
Power-on
1
1
U
U
U
U
U
U
/RESET and WDT
1
1
P
P
P
P
P
P
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
0
0
0
0
BS2
BS1
BS0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
R77
R76
R75
R74
R73
R62
R71
R70
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
R87
R86
R85
R84
R83
R82
R81
0
Power-on
1
1
1
1
1
1
1
0
/RESET and WDT
1
1
1
1
1
1
1
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
0
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 41
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 0
0×09
R9
Port 9
Bank 0
0×0A
RA
Port A
Bank 0
0×0B
RB
Port B
Bank 0
0×0C
RC
SCCR
Bank 0
0×0D
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
R97
R96
R95
R94
R93
R92
R91
R90
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
RA7
RA6
RA5
RA4
RA3
RA2
RA1
RA0
Bit Name
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
CLK2
CKL1
CLK0
IDLE
0
0
CPUS
Power-on
0
0
0
0
1
0
0
1
/RESET and WDT
0
0
0
0
1
0
0
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
WDTE WPSR2 WPSR1 WPSR0 TCCS TPSR2 TPSR1 TPSR0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
T1IE
LVDIE
ADIE
SPIIE
EXIE8
TCIE
Power-on
0
0
0
0
0
0
0
0
RE
/RESET and WDT
0
0
0
0
0
0
0
0
IMR
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
T1IF
LVDIF
ADIF
SPIIF
EXIF8
TCIF
Power-on
0
0
0
0
0
0
0
0
RF
/RESET and WDT
0
0
0
0
0
0
0
0
ISR
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
BS1
BS0
DS1
DS0
R5
LCDCR
Bank 1
R6
LCDAR
42 •
Bit 4
0
Bank 1
0×06
Bit 5
0
Bank 0
0×05
Bit 6
/RESET and WDT
Bank 0
0×0F
Bit 7
Power-on
RD
TWTCR
0×0E
Reset Type
Bit Name
LCDEN LCDPYTE
URTIE EXIE9
URTIF EXIF9
LCDF1 LCDF0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
0
0
LCD_A4 LCD_A3 LCD_A2 LCD_A1 LCD_A0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 1
0×07
R7
LCDBR
Bank 1
0×08
0×0A
0×0C
Bit 0
0
0
0
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
0
0
Power-on
0
0
0
1
1
1
1
1
0
0
0
1
1
1
1
1
P
P
P
P
P
P
P
P
Bit Name
Power-on
Bit Name
COM7 COM6
LCDC1 LCDC0 LCDVC2 LCDVC1 LCDVC0
COM5 COM4 COM3 COM2 COM1 COM0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
SEG7
SEG6
SEG5
SEG2
SEG1
SEG0
SEG4 SEG3
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
Power-on
SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9
SEG8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bank 1
Bit Name
0
RC
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
EXIE7
EXIE6
LCDSCR
RE
EIMR
Bank 1
RF
EISR
Bank 2
0×05
Bit 1
0
/RESET and WDT
LCDSCR1 Wake-up from Sleep and
Idle mode
Bank 1
0×0F
Bit 2
0
RB
2
0×0E
Bit 3
0
(LCDSCR0) Wake-up from Sleep and
Idle mode
0×0B
Bit 4
0
/RESET and WDT
LCDCCR Wake-up from Sleep and
Idle mode
Bank 1
Bit 5
0
R9
RA
Bit 6
/RESET and WDT
/RESET and WDT
(LCDVCR) Wake-up from Sleep and
Idle mode
Bank 1
Bit 7
LCD_D7 LCD_D6 LCD_D5 LCD_D4 LCD_D3 LCD_D2 LCD_D1 LCD_D0
Power-on
R8
Bank 1
0×09
Reset Type
Bit Name
R5
T1CR
Bit Name
SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16
EXIE5 EXIE4 EXIE3 EXIE2
EXIE1 EXIE0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
EXIF7
EXIF6
EXIF2
EXIF1
EXIF0
Bit Name
EXIF5 EXIF4 EXIF3
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
TIS1
TIS0
T1P2
T1P1
T1P0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
T1MS2 T1MS1 TIMS0
• 43
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 2
0×06
R6
TSR
Bank 2
0×07
R7
T1PD
Bank 2
0×08
R8
T1TD
Bank 2
0×09
R9
T2CR
Bank 2
0×0A
RA
T2PD
Bank 2
0×0B
RB
T2TD
Bank 2
0×0C
RC
SPIS
Bank 2
0×0D
RD
SPIC
Bank 2
0×0E
RE
SPIR
44 •
Reset Type
Bit 7
Bit 6
Bit Name
T1MOD
TCRB
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
Bit 5
Bit 4
Bit 3
T1CSS1 T1CSS0 T2CSS
Bit 2
T1S
Bit 1
Bit 0
T1OMS T1OC
PRD1[7] PRD1[6] PRD1[5] PRD1[4] PRD1[3] PRD1[2] PRD1[1] PRD1[0]
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
TD1[7] TD1[6]
TD1[5] TD1[4] TD1[3] TD1[2] TD1[1] TD1[0]
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
T2IF
T2IE
T2S
T2P2
T2P1
T2P0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
T2MS1 T2MS0
PRD2[7] PRD2[6] PRD2[5] PRD2[4] PRD2[3] PRD2[2] PRD2[1] PRD2[0]
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
TD2[7] TD2[6]
TD2[5] TD2[4] TD2[3] TD2[2] TD2[1] TD2[0]
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
DORD
TD1
TD0
0
OD3
OD4
0
RBF
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
CES
SPIE
SRO
SSE
Bit Name
SDOC SBRS2 SBRS1 SBRS0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
SRB7
SRB6
SRB5
SRB2
SRB1
SRB0
Bit Name
SRB4 SRB3
Power-on
U
U
U
U
U
U
U
U
/RESET and WDT
U
U
U
U
U
U
U
U
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 2
0×0F
RF
SPIW
Bank 3
0×05
R5
URC
Bank 3
0×06
R6
URS
Bank 3
0×07
R7
URRD
Reset Type
Bit Name
0×08
R8
0×09
R9
ADCR
Bank 3
0×0A
RA
ADICH
0×0B
RB
0×0C
RC
ADDH
Bit 3
Bit 2
Bit 1
SWB5 SWB4 SWB3 SWB2 SWB1
Bit 0
SWB0
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
URTD8 UMODE1 UMODE0 BRATE2 BRATE1 BRATE0 UTBE
TXE
Power-on
U
0
0
0
0
0
0
0
/RESET and WDT
P
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
URRD8 EVEN
PRE
PRERR OVERR FMERR URBF
RXE
Power-on
U
0
0
0
0
0
0
0
/RESET and WDT
P
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
URRD7 URRD6 URRD5 URRD4 URRD3 URRD2 URRD1 URRD0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
URTD7 URTD6 URTD5 URTD4 URTD3 URTD2 URTD1 URTD0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
Bit Name
ADRUN
ADP
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
CALI
ADREF
0
0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
ADE7
ADE6
ADE5
ADE2
ADE1
ADE0
ADCK1 ADCK0 ADIS3 ADIS2 ADIS1 ADIS0
ADE11 ADE10 ADE9
ADE4 ADE3
ADE8
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
(ADICL) Wake-up from Sleep and
Idle mode
Bank 3
SWB6
Bit 4
U
Bit Name
Bank 3
SWB7
Bit 5
/RESET and WDT
(URTD) Wake-up from Sleep and
Idle mode
Bank 3
Bit 6
Power-on
Bit Name
Bank 3
Bit 7
Bit Name
ADD6
ADD5
ADD4
Power-on
ADD11 ADD10
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
ADD9
ADD8 ADD7
• 45
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 3
0×0D
RD
ADDL
Bank 3
0×0E
RE
EIESH
Bank 3
0×0F
RF
EIESL
Bank 4
0×05
WBCR
Bank 4
0×07
R7
0×08
0×09
0×0A
Bit 1
Bit 0
ADD1
ADD0
0
0
0
0
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
EIES7
EIES6
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
0
0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
Power-on
EIES5 EIES4
EIES3 EIES2 EIES1 EIES0
ADWK INTWK9 INTWK8 EIES9 EIES8
LEDD7 LEDD6 LEDD5 LEDD4 LEDD3 LEDD2 LEDD1 LEDD0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
WTCS
WTIE
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
WTIF WTSSB1 WTSSB0 BUZE BSSB1 BSSB0
IOC77 IOC76 IOC75 IOC74
IOC73 IOC72 IOC71 IOC70
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
Bit Name
Power-on
Bit Name
Power-on
/RESET and WDT
P9IOCR Wake-up from Sleep and
Idle mode
Bit Name
IOC87 IOC86 IOC85 IOC84
IOC83 IOC82 IOC81
0
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
0
P
P
P
P
P
P
P
P
IOC97 IOC96 IOC95 IOC94
IOC93 IOC92 IOC91 IOC90
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
IOCA7 IOCA6 IOCA5 IOCA4 IOCA3 IOCA2 IOCA1 IOCA0
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
PAIOCR Wake-up from Sleep and
Idle mode
46 •
Bit 2
ADD2
0
R9
RA
Bit 3
ADD3
0
/RESET and WDT
P8IOCR Wake-up from Sleep and
Idle mode
Bank 4
Bit 5
0
R8
Bank 4
Bit 6
0
P7IOCR Wake-up from Sleep and
Idle mode
Bank 4
Bit 4
VOF[2] VOF[1] VOF[0]
/RESET and WDT
/RESET and WDT
LEDDCR Wake-up from Sleep and
Idle mode
R6
Bit 7
SIGN
Power-on
R5
Bank 4
0×06
Reset Type
Bit Name
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 4
0×0B
RB
Reset Type
Bit Name
0×0C
RC
0×0F
RF
WKCR
Bank 5
0×06
0×07
0×08
0×09
0×0A
1
1
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
1
1
1
1
Bit Name
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
P
P
P
P
P
P
P
P
Bit Name
INTWK7 INTWK6 INTWK5 INTWK4 INTWK3 INTWK2 INTWK1 INTWK0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
0
0
UARTE
0
UINVEN
0
0
0
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
PH77
PH76
PH75
PH74
PH73
PH72
PH71
PH70
Bit Name
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
PH87
PH86
PH85
PH84
PH83
PH82
PH81
0
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
PH97
PH96
PH95
PH94
PH93
PH92
PH91
PH90
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
PHA7
PHA6
PHA5
PHA4
PHA3
PHA2
PHA1
PHA0
Bit Name
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
PHB7
PHB6
PHB5
PHB4
PHB3
PHB2
PHB1
PHB0
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
PAPHCR Wake-up from Sleep and
Idle mode
0×0B
IOCC3 IOCC2 IOCC1 IOCC0
Power-on
/RESET and WDT
P9PHCR Wake-up from Sleep and
Idle mode
Bank 5
IOCB7 IOCB6 IOCB5 IOCB4 IOCB3 IOCB2 IOCB1 IOCB0
1
R9
RA
Bit 0
1
/RESET and WDT
P8PHCR Wake-up from Sleep and
Idle mode
Bank 5
Bit 1
1
R8
Bank 5
Bit 2
1
P7PHCR Wake-up from Sleep and
Idle mode
Bank 5
Bit 3
1
/RESET and WDT
UARC2 Wake-up from Sleep and
Idle mode
R7
Bit 4
1
R6
Bank 5
Bit 5
/RESET and WDT
PCIOCR Wake-up from Sleep and
Idle mode
Bank 4
Bit 6
Power-on
PBIOCR Wake-up from Sleep and
Idle mode
Bank 4
Bit 7
RB
/RESET and WDT
PBPHCR Wake-up from Sleep and
Idle mode
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 47
EM78P520N
8-Bit Microprocessor with OTP ROM
Address
Name
Bank 5
0×0C
RC
PCPHCR
Bank 6
0×07
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
0
0
0
0
PHC3
PHC2
PHC1
PHC0
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
OD77
OD76
OD75
OD74
OD73
OD72
OD71
OD70
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
Bit Name
OD87
OD86
OD85
OD84
OD83
OD82
OD81
0
Power-on
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
OD97
OD96
OD95
OD94
OD93
OD92
OD91
OD90
R7
/RESET and WDT
P7ODCR Wake-up from Sleep and
Idle mode
Bank 6
0×08
Reset Type
R8
/RESET and WDT
P8ODCR Wake-up from Sleep and
Idle mode
Bit Name
Bank 6
0×09
R9
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
ODA7
ODA6
ODA5
ODA4
ODA3
P9ODCR Wake-up from Sleep and
Idle mode
Bit Name
Bank 6
0×0A
RA
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
ODB7
ODB6
ODB5
ODB4
ODB3
Bit Name
0×0B
RB
RC
Port C
0×10
~
0×3F
Bank 0
~
Bank 7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
P
P
P
P
P
P
P
P
1
1
1
1
RC3
RC2
RC1
RC0
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Sleep and
Idle mode
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
U
U
U
U
U
U
U
U
/RESET and WDT
U
U
U
U
U
U
U
U
P
P
P
P
P
P
P
P
R10~R3F Wake-up from Sleep and
Idle mode
Legend: “×” = not used
“u” = unknown or don’t care
48 •
ODB0
/RESET and WDT
Bit Name
0×0C
ODB2 ODB1
Power-on
PBODCR Wake-up from Sleep and
Idle mode
Bank 6
ODA0
Power-on
PAODCR Wake-up from Sleep and
Idle mode
Bank 6
ODA2 ODA1
“P” = previous value before Wake-up or reset
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
The controller can be awakened from sleep mode and idle mode. The wake-up signals list as
following.
Wake-up Signal
Sleep Mode
×
TCC time out
INT pin
Idle Mode
Wake-up
+ interrupt
+ next instruction
Wake-up
Wake-up
+ interrupt (if enabled) + interrupt(if enabled)
+ next instruction
+ next instruction
Green Mode Normal Mode
Interrupt
Interrupt
Interrupt
Interrupt
Timer 1
×
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
Timer 2
×
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
UART
×
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
×
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
LVD
×
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
A/D
Wake-up
+ interrupt(if enabled)
+ next instruction
Wake-up
+ interrupt (if interrupt
is enabled)
+ next instruction
Interrupt
Interrupt
Wake-up
+ interrupt
+ next instruction
Interrupt
Interrupt
RESET
RESET
SPI
Watch Timer
WDT time out
×
RESET
RESET
Note: User must set the wake-up register (Bank 3 RF (EIESL) Bits 2~4 and Bank 4 RF(WKCR)
Bits 0~7. Wake up from INT pin or A/D in sleep and idle mode
After wake up:
1. If interrupt is enabled → interrupt + next instruction
2. If interrupt is disabled → next instruction
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 49
EM78P520N
8-Bit Microprocessor with OTP ROM
6.6 Oscillator
6.6.1 Oscillator Modes
The EM78P520N can be operated in the three different oscillator modes for the main
oscillator (OSCI, OSCO), namely, RC oscillator with external resistor and Internal
capacitor mode (IC), crystal oscillator mode, and PLL operation mode. User can select
one of those three modes by programming FMMD1 and FMMD0 in the Code Option
register, the sub-oscillator can be operated in crystal mode and ERIC mode. Table 3
shows how these three modes are defined.
Table 3 Oscillator Modes Defined by FSMD, FMMD1, FMMD0
FSMD
FMMD1
FMMD0
Main Clock
Sub-clock
0
0
0
RC type (ERIC)
RC type (ERIC)
0
0
1
Crystal type
RC type (ERIC)
0
1
0
PLL type
RC type (ERIC)
0
1
1
PLL type
RC type (ERIC)
1
0
0
RC type (ERIC)
Crystal type
1
0
1
Crystal type
Crystal type
1
1
0
PLL type
Crystal type
1
1
1
Crystal
None
Table 4 Summary of Maximum Operating Speeds
Conditions
Two clocks
VDD
Fxt max. (MHz)
2.0
4
3.0
8
5.0
16
6.6.2 Crystal Oscillator/Ceramic Resonators (Crystal)
EM78P520N can be driven by an external clock signal through the OSCO pin as shown
in Figure 6-6 below.
Figure 6-6 External Clock Input Circuit
50 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
In most applications, Pin OSCI and Pin OSCO can be connected with a crystal or
ceramic resonator to generate oscillation. Figure 6-7 depicts such circuitry. Table 5
provides the recommended values of C1 and C2. Since each resonator has its own
attribute, user should refer to its specification for appropriate values of C1 and C2. RS,
a serial resistor, may be necessary for AT strip cut crystal or low frequency mode.
Figure 6-7-1 Circuit for Crystal/Resonator
Table 5 Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonators
Oscillator Source
Oscillator Type
Ceramic Resonators
100K~1 MHz
Main Oscillator
1M~6 MHz
Crystal
Oscillator
6M~12 MHz
12M~20 MHz
Sub-oscillator
Crystal Oscillator
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
Frequency
C1 (pF)
C2 (pF)
455kHz
30
30
2.0 MHz
30
30
4.0 MHz
30
30
100kHz
68
68
200kHz
30
30
455kHz
30
30
1.0 MHz
30
30
2.0 MHz
30
30
4.0 MHz
30
30
6.0 MHz
30
30
8.0 MHz
30
30
10.0 MHz
30
30
12.0 MHz
30
30
16.0 MHz
20
20
20.0 MHz
15
15
32.768kHz
40
40
• 51
EM78P520N
8-Bit Microprocessor with OTP ROM
If the oscillator fails to start, the loading capacitors may need some adjustments, a
higher gain oscillator mode may be selected and a resistor may be required between
the OSC1 and OSC2 pins. The resistance for the feedback resistor RF, is typically
within the 1~10 M range. This varies with device voltage, temperature, and process
variations. Be sure to also take into consideration the device’s operating voltage and
manufacturing process when determining resistor requirements.
Figure 6-7-2 Circuit for Crystal/Resonator-Feedback Mode
330
330
C
OSCI
7404
7404
7404
Crystal
Figure 6-8 Circuit for Crystal/Resonator-Series Mode
Figure 6-9 Circuit for Crystal/Resonator-Parallel Mode
52 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.6.3 RC Oscillator Mode with Internal Capacitor
If both precision and cost are taken into consideration, the EM78P520N also offers a
special oscillation mode, which has a built-in internal capacitor and an external resistor
connected to VDD. The internal capacitor functions as temperature compensator. In
order to obtain more accurate frequency, a precise resistor is recommended.
VDD
Rext
OSCI or Xin
Figure 6-10 Circuit for Internal Capacitor Oscillator Mode
Table 6 Oscillator Frequencies
Pin
OSCI
Xin
Rext
Average Fosc 5V, 25°C
Average Fosc 3V, 25°C
51k
2.2221 MHz
2.1972 MHz
100k
1.1345 MHz
1.1203 MHz
300k
381.36kHz
374.77kHz
2.2M
32.768kHz
32.768kHz
1
Note: : Measured based on DIP packages.
2
: The values are for design reference only.
6.6.4 Phase Lock Loop (PLL Mode)
When operating in PLL mode, the High frequency is determined by the sub-oscillator.
RC (Bank 0) register can be chosen to change to high oscillator frequency. The relation
between high frequency (Fm) and sub-oscillator is shown on the table below:
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 53
EM78P520N
8-Bit Microprocessor with OTP ROM
Figure 6-11 Circuit for PLL Mode
Bits 4~6 (CLK0~CLK2) of RC (Bank 0): Main Clock Selection Bits for PLL Mode
(Code Option Select)
54 •
CLK2
CLK1
CLK0
Main Clock
Example Fs = 32.768kHz
0
X
X
Reserve
-
1
0
X
Reserve
-
1
1
X
Fs × 488
15.99 MHz
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.7 Power-on Considerations
Any microcontroller is not warranted to start operating properly before the power supply
stabilizes in its steady state. The EM78P520N has a built-in Power-on Reset (POR)
with detection level range of 1.9V to 2.1V. The circuitry eliminates the extra external
reset circuit. It will work well if VDD rises quickly enough (50 ms or less). However,
under critical applications, extra devices are still required to assist in solving power-on
problems.
6.7.1 External Power-on Reset Circuit
The circuit shown in Figure 6-12 implements an external RC to produce a reset pulse.
The pulse width (time constant) should be kept long enough to allow Vdd to reach
minimum operation voltage. This circuit is used when the power supply has a slow rise
time. Because the current leakage from the /RESET pin is ± 5 µA, it is recommended
that R should not be greater than 40K. In this way, the voltage at Pin /RESET is held
below 0.2V. The diode (D) acts as a short circuit at power-down. The capacitor, C, is
discharged rapidly and fully. The current-limited resistor Rin, prevents high current
discharge or ESD (electrostatic discharge) from flowing into Pin /RESET.
VDD
/RESET
R
Rin
D
C
Figure 6-12 External Power-on Reset Circuit
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 55
EM78P520N
8-Bit Microprocessor with OTP ROM
6.7.2 Residue-Voltage Protection
When battery is replaced, device power (VDD) is taken off but residue-voltage remains.
The residue-voltage may trip below Vdd minimum, but not to zero. This condition may
cause a poor power-on reset. Figure 6-13 and Figure 6-14 show how to build a
residue-voltage protection circuit.
VDD
VDD
33K
Q1
10K
/RESET
100K
1N4684
Figure 6-13 Residue Voltage Protection Circuit 1
VDD
VDD
R1
Q1
/RESET
R3
R2
Figure 6-14 Residue Voltage Protection Circuit 2
56 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.8 Interrupt
Registers for Interrupt
R_BANK Address
Bank 0
0x0E
Name
IMR
Bank 0
0x0F
ISR
Bank 1
0X0E
EIMR
Bank 1
0X0F
EISR
Bank 2
0X09
T2CR
Bit 7
T1IE
R/W
T1IF
R/W
Bit 6 Bit 5
LVDIE ADIE
R/W
R/W
LVDIF ADIF
R/W
R/W
Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
SPIIE URTIE EXIE9 EXIE8 TCIE
R/W
R/W
R/W
R/W
SPIIF URTIF EXIF9 EXIF8
R/W
R/W
R/W
R/W
TCIF
R/W
R/W
EXIE7 EXIE6 EXIE5 EXIE4 EXIE3 EXIE2 EXIE1 EXIE0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
EXIF7 EXIF6 EXIF5 EXIF4 EXIF3 EXIF2 EXIF1 EXIF0
R/W
R/W
R/W
T2IF
T2IE
T2S
R/W
R/W
R/W
R/W
R/W
T2MS1 T2MS0
R/W
R/W
R/W
R/W
R/W
T2P2
T2P1
T2P0
R/W
R/W
R/W
The EM78P520N has ten interrupt sources as listed below:
„
TCC overflow interrupt
„
External interrupt pin
„
Watch timer interrupt
„
Timer 1 overflow interrupt
„
Timer 2 overflow interrupt
„
A/D conversion complete interrupt
„
UART transmit/receive/error interrupt
„
SPI transmit/receive interrupt
„
Low voltage detector
This IC has internal interrupts which are falling edge triggered, namely: TCC timer
overflow interrupt, and two 8-bit upper counter/timer overflow interrupt. If these
interrupt sources change signal from high to low, the RF register will generate a “1” flag
to the corresponding register if RE register is enabled.
RF is the interrupt status register which records the interrupt request in flag bit. RE is
the interrupt mask register. Global interrupt is enabled by ENI instruction and is
disabled by DISI instruction. When one of the interrupts (when enabled) is generated,
it will cause the next instruction to be fetched from Address 0003H~001BH according to
the interrupt source.
For EM78P520N, each individual interrupt source has its own interrupt vector as
depicted in Table 7.
Before the interrupt subroutine is executed, the contents of ACC, R3[4:0] and the R5
register will be saved by hardware. After the interrupt service routine is finished, ACC,
R3[4:0] and R5 will be pushed back. While in interrupt service routine, other interrupt
service routine should not be allowed to be executed, so if other interrupts occur in an
interrupt service routine, the hardware will save this interrupt, after which when interrupt
service routine is completed, the next interrupt service routine will be executed.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 57
EM78P520N
8-Bit Microprocessor with OTP ROM
Interrupt
occurs
Interrupt sources
ACC
ENI/DISI
R3[4:0]
STACKACC
STACKR3
R5
RETI
STACKR5
Figure 6-15 Interrupt Backup Diagram
Table 7 Interrupt Vector
Interrupt Vector
Interrupt Status
0003H
TCC overflow interrupt
0006H
External interrupt
0009H
Watch timer interrupt
000CH
Timer 1 overflow interrupt
000FH
Timer 2 overflow interrupt
0012H
A/D conversion complete interrupt
0015H
UART transmit/receive/error complete interrupt
0018H
SPI transmit/receive complete interrupt
001BH
Low voltage detector interrupt
6.9 LCD Driver
Registers for LCD Driver Circuit
R_BANK
Address
Name
Bank 1
0×05
LCDCR
Bank 1
0×06
LCDAR
Bank 1
0×07
LCDBR
Bank 1
0×08
LCDVCR
Bank 1
0×09
LCDCCR
Bit 6
LCDEN LCDTYPE
Bank 1 0×0A~0×0C LCDSCR0~2
58 •
Bit 7
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BS1
BS0
DS1
DS0
LCDF1
LCDF0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
−
−
−
−
−
−
LCD_D7
LCD_D6
R/W
R/W
R/W
R/W
−
−
−
LCDC1
−
−
−
R/W
R/W
R/W
R/W
R/W
CON7
CON6
CON5
CON4
CON3
CON2
CON1
CON0
LCD_A4 LCD_A3 LCD_A2 LCD_A1 LCD_A0
R/W
R/W
R/W
R/W
R/W
LCD_D5 LCD_D4 LCD_D3 LCD_D2 LCD_D1 LCD_D0
R/W
R/W
R/W
R/W
LCDC0 LCDVC2 LCDVC1 LCDVC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
The EM78P520N can drive an LCD with up to 23 segments and 8 commons that can
drive a total of 8×23 dots. LCD block is made up of LCD driver, display RAM, segment
output pins, common output pins and LCD operating power supply pins. This circuit
can work in normal mode, green mode and idle mode.
The LCD duty, bias, the number of segment, the number of common and frame
frequency are determined by the LCD controller register.
The basic structure contains a timing control which use the main system clock or
subsystem clock to generate the proper timing for different duty and display access.
The R5 register is a command register for LCD driver that include LCD enable/disable,
bias (1/2, 1/3 and 1/4), duty (Static, 1/3, 1/4, 1/8) and LCD frame frequency control.
The register Bank 1 R6 is an LCD RAM address control register. The register Bank 1
R7 is an LCD RAM data buffer. The register Bank 1 R8 is an LCD contrast control and
LCD clock register. The control register is explained below.
6.9.1 R5 LCDCR ( LCD Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LCDEN
LCDTYPE
BS1
BS0
DS1
DS0
LCDF1
LCDF0
Bit 7 (LCDEN): LCD Enable Select Bit
0 : Disable LCD Circuit. All common/segment outputs are set to VDD
Level.
1 : Enable LCD circuit
Bit 6 (LCDTYPE): LCD Drive Waveform Type Select Bit
0 : A type wave
1 : B type wave
Bits 5~4 (BS1~BS0): LCD Bias Select Bits
BS1
BS0
LCD Bias Select
0
0
1/2 Bias
0
1
1/3 Bias
1
×
1/4 Bias
Bits 3~2 (DS1~DS0): LCD Duty Select Bits
DS1
DS0
LCD Duty
0
0
Static
0
1
1/3 Duty
1
0
1/4 Duty
1
1
1/8 Duty
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 59
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 1~0 (LCDF1~LCDF0): LCD Frame Frequency Control Bits
LCD Frame Frequency (e.q. Fs =32.768K)
LCDF1 LCDF0
Static
1/3 Duty
1/4 Duty
1/8 Duty
0
0
Fs/(512×1) = 64.0 Fs/(172×3) =63.5
Fs/(128×4) = 64
Fs/(64×8) = 64.0
0
1
Fs/(560×1) = 58.5 Fs/(188×3) = 58
Fs/(140×4) = 58.5 Fs/(70×8) = 58.5
1
0
Fs/(608×1) = 53.9 Fs/(204×3) = 53.5 Fs/(152×4) = 53.9 Fs/(76×8) = 53.9
1
1
Fs/(464×1) = 70.6 Fs/(156×3) = 70
Fs/(116×4) = 70.6 Fs/(58×8) = 70.6
6.9.2 R6 LCDADDR (LCD Address Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
LCD_A4
LCD_A3
LCD_A2
LCD_A1
LCD_A0
Bits 7~5: Reserved
Bits 4~0 (LCD_A4~LCD_A0): LCD RAM Address
R7 (LCD Data Buffer)
R6
Segment
(LCD
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Address) (LCD_D7) (LCD_D6) (LCD_D5) (LCD_D4) (LCD_D3) (LCD_D2) (LCD_D1) (LCD_D0)
00H
SEG0
01H
SEG1
02H
SEG2
|
|
14H
SEG20
15H
SEG21
16H
SEG22
Common
60 •
COM7
COM6
COM5
COM4
COM3
COM2
COM1
COM0
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.9.3 R7 LCDBR (LCD Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LCD_D7
LCD_D6
LCD_D5
LCD_D4
LCD_D3
LCD_D2
LCD_D1
LCD_D0
Bits 7~0 (LCD_D7~LCD_D0): LCD RAM Data Transfer Register
* When the value of the display segment is “1”, the LCD display is turned on; when the
bit value is “0”, the LCD display is turned off.
VDD
R
VLCD1
6R
R
MUX VLCD2
R
0.6 R
VLCD3
0.8 R
R
BS0 ~ BS1
0.8 R
VLCD
MUX
0.5 R
0.6R
LCDVC0 ~ LCDVC2
0.3 R
0.4 R
VSS
6.9.4 R8 LCDVCR (LCD Voltage Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
LCDC1
LCDC0
LCDVC2
LCDVC1
LCDVC0
Bits 7~5: Reserved
Bits 4~3 (LCDC1~LCDC0): LCD Clock
LCDC1
LCDC0
Fm
FLCD
0
0
16 MHz
Fc/29
0
1
8 MHz
Fc/28
1
0
4 MHz
Fc/27
1
1
2 MHz
Fc/26
When the main oscillator operates in crystal mode and there is no sub-oscillator, it is a
must to set these two bits used for LCD clock.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 61
EM78P520N
8-Bit Microprocessor with OTP ROM
Bits 2~0 (LCDVC2~LCDVC0): LCD Voltage Control Bits
LCDVC2
LCDVC1
LCDVC0
Output
0
0
0
0.4VDD ~ VDD
0
0
1
0.34VDD ~ VDD
0
1
0
0.26VDD ~ VDD
0
1
1
0.18VDD ~ VDD
1
0
0
0.13VDD ~ VDD
1
0
1
0.07VDD ~ VDD
1
1
0
0.04VDD ~ VDD
1
1
1
0V ~ VDD
NonSelect
Select
LCD Clock
Frame
VDD
COM
VLCD
VDD
SEG
VLCD
VDD
COM-SEG
VLCD
-VDD
Static
62 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
1frame
VDD
VLCD3
COM 0
VLCD
VDD
COM 1
VLCD3
VLCD
VDD
VLCD3
COM 2
VLCD
VDD
VLCD3
SEG N
VLCD
VDD
VLCD3
SEG N - COM0
VLCD
ON
-VLCD3
-VDD
VDD
VLCD3
SEG N - COM1
VLCD
OFF
-VLCD3
-VDD
1/2 bias, 1/3 duty
B type
1frame
VDD
COM 0
VLCD3
VLCD
VDD
COM 1
VLCD3
VLCD
VDD
VLCD3
COM 2
VLCD
VDD
SEG N
VLCD3
VLCD
VDD
VLCD3
VLCD
SEG N - COM0
ON
-VLCD3
-VDD
VDD
VLCD3
SEG N - COM1
VLCD
OFF
-VLCD3
-VDD
1/2 bias, 1/4 duty
B type
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 63
EM78P520N
8-Bit Microprocessor with OTP ROM
1frame
VDD
COM 0
VLCD3
VLCD
VDD
COM 1
VLCD3
VLCD
VDD
VLCD3
COM 2
VLCD
VDD
SEG N
VLCD3
VLCD
VDD
VLCD3
VLCD
SEG N - COM0
ON
-VLCD3
-VDD
VDD
VLCD3
SEG N - COM1
VLCD
OFF
-VLCD3
-VDD
1/2 bias, 1/8 duty
B type
1 frame
VDD
VLCD2
COM 0
VLCD3
VLCD
VDD
VLCD2
COM 1
VLCD3
VLCD
VDD
VLCD2
COM 2
VLCD3
VLCD
VDD
SEG N
VLCD2
VLCD3
VLCD
VDD
VLCD3
SEG N - COM0
ON
VLCD
-VLCD3
-VDD
VDD
SEG N - COM1
VLCD3
OFF
VLCD
-VLCD3
-VDD
1/3 bias, 1/3 duty
B type
64 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
1 frame
VDD
VLCD2
COM 0
VLCD3
VLCD
VDD
VLCD2
COM 1
VLCD3
VLCD
VDD
VLCD2
COM 2
VLCD3
VLCD
VDD
SEG N
VLCD2
VLCD3
VLCD
VDD
SEG N - COM0
VLCD3
ON
VLCD
-VLCD3
-VDD
VDD
SEG N - COM1
VLCD3
OFF
VLCD
-VLCD3
-VDD
1/3 bias, 1/4 duty
B type
1 frame
VDD
VLCD2
VLCD3
VLCD
VDD
VLCD2
VLCD3
VLCD
VDD
VLCD2
VLCD3
VLCD
VDD
VLCD2
VLCD3
VLCD
VDD
VLCD3
VLCD2
VLCD
-VLCD2
-VLCD3
-VDD
VDD
VLCD3
VLCD2
COM 0
COM 1
COM 2
SEG N
SEG N - COM0
ON
SEG N - COM1
OFF
VLCD
-VLCD2
-VLCD3
-VDD
1/3 bias, 1/8 duty
B type
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 65
EM78P520N
8-Bit Microprocessor with OTP ROM
Select
Frame
VDD
VLCD1
COM 0
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 1
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 2
VLCD2
VLCD3
VLCD
VDD
VLCD1
SEGN
VLCD2
VLCD3
VLCD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM0
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM1
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
1/4 Bias 1/3 Duty
66 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Select
Frame
VDD
VLCD1
COM 0
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 1
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 2
VLCD2
VLCD3
VLCD
VDD
VLCD1
SEGN
VLCD2
VLCD3
VLCD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM0
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM1
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
1/4 Bias 1/4 Duty
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 67
EM78P520N
8-Bit Microprocessor with OTP ROM
Select
Frame
VDD
VLCD1
COM 0
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 1
VLCD2
VLCD3
VLCD
VDD
VLCD1
COM 2
VLCD2
VLCD3
VLCD
VDD
VLCD1
SEGN
VLCD2
VLCD3
VLCD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM0
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
VDD
VLCD1
VLCD2
VLCD3
SEGN-COM1
VLCD
-VLCD3
-VLCD2
-VLCD1
-VDD
1/4 Bias 1/8 Duty
68 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.10 A/D Converter
Registers for AD Converter Circuit
R_BANK Address
Name
Bank 3
0X09
ADCR
Bank 3
0x0A
ADICH
Bank 3
0X0B
ADICL
Bank 3
0X0C
ADDH
Bank 3
0X0D
ADDL
Bit 7
Bit 6
Bit 5
ADRUN
ADP
R/W
R/W
Bit 3
Bit 2
Bit 1
Bit 0
ADCK1 ADCK0 ADIS3
ADIS2
ADIS1
ADIS0
R/W
R/W
R/W
CALI
ADREF
ADE9
ADE8
R/W
R/W
ADE7
ADE6
ADE5
R/W
R/W
R/W
R/W
SIGN
R/W
R
R/W
R
R/W
R/W
R/W
R/W
ADE4
ADE3
ADE2
ADE1
ADE0
R/W
R/W
R/W
R/W
R/W
ADD8
ADD7
ADD6
ADD5
ADD4
R
R
R
R
R
ADD3
ADD2
ADD1
ADD0
R
R
R
R
VOF[2] VOF[1] VOF[0]
R/W
R/W
ADE11 ADE10
ADD11 ADD10 ADD9
R
Bit 4
R/W
R/W
ADWK INTWK INTWK EIES9 EIES8
Bank 0
0x0F
EIESL
Bank 0
0x0E
IMR
Bank 0
0x0F
ISR
R/W
T1IE
R/W
T1IF
R/W
LVDIE ADIE
R/W
R/W
LVDIF ADIF
R/W
R/W
R/W
R/W
R/W
R/W
SPIIE URTIE EXIE9 EXIE8 TCIE
R/W
R/W
R/W
R/W
SPIIF URTIF EXIF9 EXIF8
R/W
R/W
R/W
R/W
R/W
TCIF
R/W
Figure 6-16 AD Converter
This is a 12-bit successive approximation type AD converter. The upper side of analog
reference voltage can select either internal VDD or external input pin P84 (VREF) by
setting the ADREF bit in ADICH. Connecting to the external VREF is more accurate
than connecting to the internal VDD.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 69
EM78P520N
8-Bit Microprocessor with OTP ROM
6.10.1 ADC Data Register
When A/D conversion is completed, the result is loaded to the ADDH (8-bit) and ADDL
(4-bit). The START/END bit is cleared, and the ADIF is set.
6.10.2 A/D Sampling Time
The accuracy, linearity, and speed of the successive approximation A/D converter are
dependent on the properties of the ADC. The source impedance and the internal
sampling impedance directly affect the time required to charge the sample holding
capacitor. The application program controls the length of the sample time to meet the
specified accuracy. Generally speaking, the program should wait for 2 µs for each KΩ
of the analog source impedance and at least 2 µs for the low-impedance source. The
maximum recommended impedance for the analog source is 10KΩ at VDD =5V. After
the analog input channel is selected, this acquisition time must be done before A/D
conversion can be started.
6.10.3 A/D Conversion Time
ADCK0 and ADCK1 select the conversion time (Tct), in terms of instruction cycles.
This allows the MCU to run at maximum frequency without sacrificing accuracy of A/D
conversion. For the EM78P520N, the conversion time per bit is about 4 µs. Table 8
shows the relationship between Tct and the maximum operating frequencies.
Table 8
ADCK1:0 Operation Mode
70 •
Max. Frequency
(Fc)
Max. Conversion
Rate per Bit
Max. Conversion
Rate
00
Fc/4
1 MHz
250kHz (4 µs)
60 µs (16.66kHz)
01
Fc/16
4 MHz
250kHz (4 µs)
60 µs (16.66kHz)
10
Fc/32
8 MHz
250kHz (4 µs)
60 µs (16.66kHz)
11
Fc/64
16 MHz
250kHz (4 µs)
60 µs (16.66kHz)
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.11 UART (Universal Asynchronous Receiver/Transmitter)
Registers for UART Circuit
R_BANK Address Name
Bank 3
0X05
URC
Bank 3
0X06
URS
Bank 3
0X07
URRD
Bank 3
0X08
URTD
Bank 5
0x06
UARC2
Bank 0
Bank 0
0x0E
0x0F
Bit 7
Bit 6
Bit 5
Bit 1
Bit 0
URTD8 UMODE1 UMODE0 BRATE2 BRATE1 BRATE0 UTBE
TXE
W
R/W
R/W
URRD8
EVEN
PRE
R
R/W
R/W
Bit 4
R/W
Bit 3
R/W
Bit 2
R/W
R
PRERR OVERR FMERR URBF
R
R
R
R
R/W
RXE
R/W
URRD7 URRD6 URRD5 URRD4 URRD3 URRD2 URRD1 URRD0
R
R
R
R
R
R
R
R
URTD 7 URTD 6 URTD 5 URTD 4 URTD 3 URTD 2 URTD 1 URTD0
W
W
W
W
UARTE
IMR
ISR
LVDIE
ADIE
R/W
R/W
R/W
T1IF
LVDIF
ADIF
R/W
R/W
R/W
W
W
W
UINVEN
R/W
T1IE
W
R/W
SPIIE URTIE EXIE9 EXIE8 TCIE
R/W
R/W
R/W
R/W
SPIIF URTIF EXIF9 EXIF8
R/W
R/W
R/W
R/W
R/W
TCIF
R/W
Figure 6-17 Functional Block Diagram
In Universal Asynchronous Receiver Transmitter (UART), each transmitted or received
character is individually synchronized by framing it with a start bit and stop bit.
Full duplex data transfer is possible since the UART has independent transmit and
receive sections. Double buffering for both sections allows the UART to be
programmed for continuous data transfer.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 71
EM78P520N
8-Bit Microprocessor with OTP ROM
The figure below shows the general format of one character sent or received. The
communication channel is normally held in the marked state (high). Character
transmission or reception starts with a transition to the space state (low).
The first bit transmitted or received is the start bit (low). It is followed by the data bits, in
which the Least Significant Bit (LSB) comes first. The data bits are followed by the
parity bit. If present, then the stop bit or bits (high) confirm the end of the frame.
In receiving, the UART synchronizes on the falling edge of the start bit. When two or
three “0” are detected during three samples, it is recognized as normal start bit and the
receiving operation is started.
START
bit
D0
D1
1 bit
D2
Idle state
(mark)
Parity STOP
bit
bit
Dn
7 or 8 bits
1 bit
1 bits
One character or frame
Figure 6-18 Data Format in UART
6.11.1 UART Mode
There are three UART modes. Mode 1 (7 bits data) and Mode 2 (8 bits data) allow the
addition of a parity bit. The parity bit addition is not available in Mode 3. Figure 6-19
below shows the data format in each mode.
UMODE
Mode 1
Mode 2
Mode 3
PRE
1
2
3
4
5
6
7
8
9
10
11
0
0
0
START
7 bits DATA
STOP
0
0
1
START
7 bits DATA
Parity
0
1
0
START
8 bits DATA
STOP
0
1
1
START
8 bits DATA
Parity STOP
1
0
X
START
9 bits DATA
STOP
STOP
Figure 6-19 UART Model
72 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.11.2 Transmitting
In transmitting serial data, the UART operates as follows:
1. Set the TXE bit of the URC register to enable the UART transmission function.
2. Write data into the URTD register and the UTBE bit of the URC register will be set
by hardware.
3. Then start transmitting.
4. Serially transmitted data are transmitted in the following order from the TX pin.
5. Start bit: one “0” bit is output.
6. Transmit data: 7, 8 or 9 bits data are output from the LSB to the MSB.
7. Parity bit: one parity bit (odd or even selectable) is output.
8. Stop bit: one “1” bit (stop bit) is output.
Mark state: output “1” continues until the start bit of the next transmitted data.
After transmitting the stop bit, the UART generates a TBEF interrupt (if enabled).
6.11.3 Receiving
In receiving, the UART operates as follows:
1. Set RXE bit of the URS register to enable the UART receiving function. The UART
monitors the RX pin and synchronizes internally when it detects a start bit.
2. Receive data is shifted into the URRD register in the order from LSB to MSB.
3. The parity bit and the stop bit are received. After one character is received, the
URBF bit of the URS register will be set to “1”.
4. The UART makes the following checks:
(a) Parity check: The number 1 of the received data must match the even or odd
parity setting of the EVEN bit in the URS register.
(b) Frame check: The start bit must be “0” and the stop bit must be “1”.
(c) Overrun check: The URBF bit of the URS register must be cleared (that means
the URRD register should be read out) before the next received data is loaded
into the URRD register.
If any checks failed, the URTIF interrupt will be generated (if enabled), and an error
flag is indicated in PRERR, OVERR or FMERR bit. The error flag should be
cleared by software otherwise, URTIF interrupt will occur when the next byte is
received.
5. Read received data from the URRD register. The URBF bit will be cleared by
hardware.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 73
EM78P520N
8-Bit Microprocessor with OTP ROM
6.11.4 Baud Rate Generator
The baud rate generator is comprised of a circuit that generates a clock pulse to
determine the transfer speed for transmission/reception in the UART.
The BRATE2~BRATE0 bits of the URC register can determine the desired baud rate.
6.11.5 UART Timing
1. Transmission Counter Timing
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
1
2
TSYSTEM/16
One bit cycle
Start bit
TXD pin
Bit 0
2. Receiving Counter Timing
Synchronization
(Reset counter)
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
3
4
TSYSTEM /16
One bit cycle
RXD pin
Stop bit
Start bit
Bit 0
Sampling
Timing
3. UART Transmit operation (8 bits data with parity bit)
TXD
pin
START
bit
D0
D1
D2
Dn
Parity STOP
bit
bit
START
bit
D0
D1
D2
Clear by hardware when
write data into UARTTx .
And start transmitting.
UTBE
URTIF
74 •
Clear by
software
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
4. UART Receive operation (8 bits data with parity and stop bit):
RXD
pin
START
bit
D0
D1
D2
Dn
Parity STOP START
bit
bit
bit
D0
D1
D2
Synchronization
Sample
Timing
Clear by hardware when
read data fromUARTRx
URBF
Clear by
software
URTIF
PRERR
OVERR
FMERR
6.12 SPI (Serial Peripheral Interface)
6.12.1 Overview and Features
Overview:
Figures 6-20 and 6-21 shows how the EM78P520N communicates with other devices
through SPI module. If the EM78P520N is a master controller, it sends clock through
the SCK pin. A couple of 8-bit data are transmitted and received at the same time.
However, if the EM78P520N is defined as a slave, its SCK pin could be programmed as
an input pin. Data will continue to be shifted based on both the clock rate and the
selected edge. The SPIS Bit 7 (DORD) can also set to determine the SPI transmission
order, SPIC Bit 3 (SDOC) to control the SO pin after serial data output status and SPIS
Bit 6 (TD1), Bit 5 (TD0) determines the SO status output delay times.
Features:
„
Operation in either Master mode or Slave mode
„
Full duplex, three-wire synchronous communication
„
Programmable baud rates of communication
„
Programming clock polarity, (RD Bit 7)
„
Interrupt flag available for the read buffer full
„
SPI transmission order
„
After serial data output SDO status select
„
SDO status output delay times
„
Up to 8 MHz (maximum) bit frequency
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 75
EM78P520N
8-Bit Microprocessor with OTP ROM
SO
SPIR Reg
SPIW
SPIW Reg
Reg
SPIR Reg
SPIW
SPIW Reg
Reg
/SS
SPIS Reg
Master Device
SI
SPI Module
SCK
Slave Device
Figure 6-20 SPI Master/Slave Communication
Figure 6-21 SPI Configuration of Single-Master and Multi-Slave
76 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.12.2 SPI Function Description
Read
RBF
SPIIF
Write
SPIR
SSE
reg
SPIW reg
Set to 1
Buffer Full Detector
SPIS
reg
shift right
PA4/SEG4/SI
SPIC reg
PA5/SEG5/SO
Edge
Select
SBR0 ~SBR2
PA7/SEG7//SS
Noise
Filter
SBR2~SBR0
/ SS
Clock Select
Prescaler
2, 4, 8, 16, 32
Fosc
Edge
Select
PA6/SEG6/SCK
TMR2
CES
Figure 6-22 SPI Block Diagram
Figure 6-23 Function Block Diagram of SPI Transmission
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 77
EM78P520N
8-Bit Microprocessor with OTP ROM
Below are the functions of each block and explanations on how to carry out the SPI
communication with the signals depicted in Figure 6-22 and Figure 6-23.
„
PA4/SEG4/SI: Serial Data In
„
PA5/SEG5/SO: Serial Data Out
„
PA6/SEG6/SCK: Serial Clock
„
PA7/SEG7//SS: /Slave Select (Option). This pin (/SS) may be required in slave
mode
„
RBF: Set by Buffer Full Detector
„
Buffer Full Detector: Set to 1 when an 8-bit shifting is completed.
„
SSE: Loads the data in SPIS register, and begin to shift
„
SPIS reg.: Shifting byte in and out. The MSB is shifted first. Both the SPIR and the
SPIW registers are shift at the same time. Once data are written, SPIS starts
transmitting / receiving. The data received will be moved to the SPIR register as
the shifting of the 8-bit data is completed. The RBF (Read Buffer Full) flag and the
SPIIF (SPI Interrupt) flags are then set.
„
SPIR reg.: Read buffer. The buffer will be updated as the 8-bit shifting is
completed. The data must be read before the next reception is completed. The
RBF flag is cleared as the SPIR register reads.
„
SPIW reg.: Write buffer. The buffer will deny any attempts to write until the 8-bit
shifting is completed.
„
The SSE bit will be kept in “1“ if the communication is still undergoing. This flag
must be cleared as the shifting is completed. Users can determine if the next write
attempt is available.
„
SBRS2~SBRS0: Programming the clock frequency/rates and sources.
„
Clock Select: Selecting either the internal or the external clock as the shifting
clock.
„
Edge Select: Selecting the appropriate clock edges by programming the CES bit
6.12.3 SPI Signal and Pin Description
The detailed functions of the four pins, SI, SO, SCK, and /SS are as follows:
PA4/SEG4/SI:
„
Serial Data In
„
Receive sequentially, the Most Significant Bit (MSB) first, Least Significant Bit (LSB)
last
„
78 •
Defined as high-impedance, if not selected
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
„
Program the same clock rate and clock edge to latch on both the master and slave
devices.
„
The byte received will update the transmitted byte.
„
The RBF (located in Register 0x0C) will be set as the SPI operation is completed.
„
Timing is shown in Figure 6-23 and 6-24.
PA5/SEG5/SO:
„
Serial Data Out
„
Transmit sequentially; the Most Significant Bit (MSB) first, Least Significant Bit
(LSB) last
„
Program the same clock rate and clock edge to latch on both the master and slave
devices.
„
The received byte will update the transmitted byte.
„
The CES (located in Register 0x0D) bit will be reset, as the SPI operation is
completed.
„
Timing is shown in Figure 6-23 and 6-24.
PA6/SEG6/SCK:
„
Serial Clock
„
Generated by a master device
„
Synchronize the data communication on both the SI and SO pins
„
The CES (located in Register 0x0D) is used to select the edge to communicate.
„
The SBR0~SBR2 (located in Register 0x0D) is used to determine the baud rate of
communication
„
The CES, SBR0, SBR1, and SBR2 bits have no effect in slave mode
„
Timing is shown in Figure 6-23 and 6-24
PA7/SEG7//SS:
„
Slave Select; negative logic
„
Generated by a master device to signify the slave(s) to receive data
„
Goes low before the first cycle of SCK appears, and remains low until the last 8th
cycle is completed.
„
Ignores the data on the SI and SO pins while /SS is high, because SO is no longer
driven.
„
Timing is shown in Figure 6-23 and 6-24.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 79
EM78P520N
8-Bit Microprocessor with OTP ROM
Note:
1. The Priority of PA4/SEG4/SI Pin
PA4/SEG4/SI Pin Priority
High
Medium
Low
SI
SEG4
PA4
2. The Priority of PA5/SEG5/SO Pin
PA5/SEG5/SO Pin Priority
High
Medium
Low
SO
SEG5
PA5
3. The Priority of PA6/SEG6/SCK Pin
PA6/SEG6/SCK Pin Priority
High
Medium
Low
SCK
SEG6
PA6
4. The Priority of PA7/SEG7//SS Pin
PA7/SEG7//SS Pin Priority
High
Medium
Low
/SS
SEG7
PA7
6.12.4 Programming the Related Registers
Registers for the SPI Circuit
R_BANK Address Name
Bank 2
0X0C
SPIS
Bank 2
0X0D
SPIC
Bank 2
0X0E
SPIR
Bank 2
0X0F
SPIW
Bank 0
Bank 0
0X0E
0X0F
IMR
ISR
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DORD
TD1
TD0
-
OD3
OD4
-
RBF
R/W
R/W
-
R
R/W
R/W
R/W
-
CES
SPIE
SRO
SSE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SRB7
SRB6
SRB5
SRB4
SRB3
SRB2
SRB1
SRB0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SWB7
SWB6
SWB5
SWB4
SWB3
SWB2
SWB1
SWB0
SDOC SBRS2 SBRS1 SBRS0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
T1IE
LVDIE
ADIE
SPIIE
URTIE
EXIE9
EXIE8
TCIE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
T1IF
LVDIF
ADIF
SPIIF
URTIF
EXIF9
EXIF8
TCIF
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
As the SPI mode is defined, the related registers of this operation are shown.
Related Control Registers of the SPI Mode
Address
Bank 2
0x0D
Bank 0
0x0E
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SPIC
CES
SPIE
SRO
SSE
SDOC
SBR2
SBR1
SBR0
IMR
T1IE
LVDIE
ADIE
SPIIE
URTIE
EXIE9
EXIE8
TCIE
SPIC: SPI Control Register
80 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Bit 7 (CES): Clock Edge Select Bit
0 : Data shifts out on a rising edge, and shifts in on a falling edge. Data is
on hold during a low-level.
1 : Data shifts out on a falling edge, and shifts in on a rising edge. Data is
on hold during a high-level.
Bit 6 (SPIE): SPI Enable Bit
0 : Disable SPI mode
1 : Enable SPI mode
Bit 5 (SRO): SPI Read Overflow Bit
0 : No overflow
1 : A new data is received while the previous data is still being held in the
SPIRB register. In such situation, the data in the SPIS register will be
destroyed. To avoid setting this bit, users are required to read the
SPIRB register although only transmission is implemented. This can
only occur in slave mode.
Bit 4 (SSE): SPI Shift Enable Bit
0 : Resets as soon as the shift is completed, and the next byte is read to
shift.
1 : Starts to shift, and remained on “1” while the current byte is still being
transmitted.
Bit 3 (SDOC): SDO Output Status Control Bit
0 : After the serial data output, the SDO remain high.
1 : After the serial data output, the SDO remain low.
Bits 2~0 (SBRS2~SBRS0): SPI Baud Rate Select Bits
SBRS2
SBRS1
SBRS0
Mode
SPI Baud Rate
0
0
0
Master
Fosc/2
0
0
1
Master
Fosc/4
0
1
0
Master
Fosc/8
0
1
1
Master
Fosc/16
1
0
0
Master
Fosc/32
1
0
1
Master
Timer 2
1
1
0
Slave
/SS enable
1
1
1
Slave
/SS disable
IMR:
Interrupt Mask Register
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 81
EM78P520N
8-Bit Microprocessor with OTP ROM
Bit 4 (SPIIE): Interrupt Enable Bit
0 : Disable SPIIF interrupt
1 : Enable SPIIF interrupt
Related Status/Data Registers of the SPI Mode
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0X0C
SPIS
DORD
TD1
TD0
-
OD3
OD4
-
RBF
0x0E
SPIR
SRB7
SRB6
SRB5
SRB4
SRB3
SRB2
SRB1
SRB0
0x0F
SPIW
SWB7
SWB6
SWB5
SWB4
SWB3
SWB2
SWB1
SWB0
SPI Status Register
SPIS:
Bit 7 (DORD): Data Shift Control Bit
0 : Shift left (MSB first)
1 : Shift right (LSB first).
Bits 6~5 (TD1~TD0): SDO Status Output Delay Times Options
TD1
TD0
Delay Time
0
0
8 CLK
0
1
16 CLK
1
0
24 CLK
1
1
32 CLK
Bit 4:
Reserved
Bit 3 (OD3): Open-Drain Control Bit
0 : Open-drain disable for SDO.
1 : Open-drain enable for SDO
Bit 2 (OD4): Open-Drain Control Bit
0 : Open-drain disable for SCK
1 : Open-drain enable for SCK
Bit 1:
Reserved
Bit 0 (RBF): Read Buffer Full Flag
0 : Receiving not completed, and SPIRB has not fully exchanged.
1 : Receiving completed, and SPIRB is fully exchanged.
SPIRB:
SPI Read Buffer. Once the serial data is received completely, it will load to
SPIRB from SPIS register. The RBF bit in the SPIS register will also be set.
SPIWB:
SPI Write Buffer. As a transmitted data is loaded, the SPIS register
stands by and start to shift the data when sensing SCK edge with SSE set
to “1”.
82 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.12.5 SPI Mode Timing
Figure 6-24 SPI Mode with /SS Disabled
The SCK edge is selected by programming bit CES. The waveform shown in Figure
6-24 is applicable regardless of whether the EM78P520N is in master or slave mode
with /SS disabled. However, the waveform in Figure 6-25 can only be implemented in
slave mode with /SS enabled.
Figure 6-25 SPI Mode with /SS Enabled
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 83
EM78P520N
8-Bit Microprocessor with OTP ROM
6.13 Timer/Counter 1
Registers for Timer/Counter 1 Circuit
R_BANK Address Name
Bank 2
0X05
T1CR
Bank 2
0X06
TSR
Bank 2
0X07
T1PD
0X08
T1TD
Bank 0
0x0E
IMR
0x0F
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TIS1
TIS0
T1MS2
T1MS1
T1MS0
T1P2
T1P1
T1P0
W
W
W
W
W
W
W
W
T1MOD
TRCB
R/W
R/W
T1CSS1 T1CSS0 T2CSS
R/W
R/W
R/W
T1S
R/W
T1OMS T1OC
R/W
R/W
PRD1[7] PRD1[6] PRD1[5] PRD1[4] PRD1[3] PRD1[2] PRD1[1] PRD1[0]
Bank 2
Bank 0
Bit 7
ISR
R/W
R/W
R/W
R/W
R/W
R/W
TD1[7]
TD1[6]
TD1[5]
TD1[4]
TD1[3]
TD1[2]
R/W
R/W
R/W
R/W
R/W
R/W
T1IE
LVDIE
ADIE
R/W
R/W
TD1[1] TD1[0]
R/W
R/W
SPIIE URTIE EXIE9 EXIE8 TCIE
R/W
R/W
R/W
R/W
T1IF
LVDIF
ADIF
SPIIF
R/W
R/W
R/W
R/W
R/W
R/W
R/W
URTIF EXIF9 EXIF8
R/W
R/W
R/W
R/W
TCIF
R/W
Figure 6-26 Timer/Counter 1 Configuration
84 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.13.1 Timer Mode
In Timer mode, counting down is performed using the internal clock. The down-counter
value auto reloads from T1PD. When the content of the down-counter underflows, an
interrupt is generated and the counter is cleared. Counting down resumes after the
counter is cleared.
6.13.2 T1OUT Mode
In Timer 1 underflow Output mode, counting down is performed using the internal clock
with prescaler or external clock through T1CLK Pin or Sub Frequency with prescaler.
The counter value is loaded from T1PD, when the counter underflows. The F/F output
is toggled and the counter is auto-reloaded from T1PD, each time an overflow is found.
The F/F output is inverted and output to /T1OUT pin. This mode can generate 50%
duty pulse output. The program can initialize the F/F and it is initialized to “0” during a
reset. A T1OUT interrupt is generated each time the /T1OUT output is toggled.
Clock Source
Down-counter
T1PD
n
n-1 n-2
n-3
1
0
n
n-1
1
0
n
n-1
1
0
n
n-1
n-2
n
F/F
T1OUT Pin
Timer 1 Interrupt
Figure 6-27 T1OUT Mode Timing Diagram
6.13.3 Capture Mode
In Capture mode, the pulse width, period and duty of the T1CAP input pin are
measured, which can be used in decoding the remote control signal. The counter is
free running by the internal clock. On the rising (falling) edge of T1CAP pin input, the
contents of the counter is loaded into T1PD, then the counter is cleared and interrupt is
generated. On the falling (rising) edge of T1CAP pin input, the contents of the counter
are loaded into T1TD. The counter is still counting, on the next rising edge of the
T1CAP pin input, the contents of the counter are loaded into T1PD, the counter is
cleared and interrupt is generated again. If an overflow occurs before the edge is
detected, 00H is loaded into T1PD and an underflow interrupt is generated. During
interrupt processing, it can be determined whether or not there is an overflow by
checking whether the T1PD value is 00H. After an interrupt (capture to T1PD or
overflow detection) is generated, capture and underflow detection are halted until
T1PD is read out.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 85
EM78P520N
8-Bit Microprocessor with OTP ROM
Clock Source
Down-counter
FF
FE K FF FE
m+1
m
m-1
n-1 n FF FE
FD
1
0
FFFE FD
FC
T1CAP Pin Input
T1PD
K
T1TD
Timer 1 Interrupt
n
0 (underflow)
m
Capture
1
Capture
underflow
Reading T1PD
Figure 6-28 Capture Mode Timing Diagram
6.13.4
PWM Mode
In Pulse Width Modulation (PWM) Output mode, counting down is performed using the
internal clock with prescaler or external clock through T1CLK Pin or Sub Frequency
with prescaler. The Duty of PWM1 is controlled by T1TD, and the period of PWM1 is
controlled by T1PD. The pulse at the PWM1 pin is held to a high level as long as the
counter value of T1TD is greater than or equal to zero, while the pulse is held to a low
level until the counter value of T1PD underflows. The F/F is toggled when underflow
occurs. While the counter is still counting, the F/F is toggled again when the counter
underflows, then the counter is auto reloaded from T1PD. The F/F output is inverted
and output to the /PWM pin. A Timer 1 interrupt is generated each time an underflow
occurs. T1PD is configured as a 2-stage shift register and during output, will not switch
until one output cycle is completed even if T1PD is overwritten. Therefore, the output
can be changed continuously. T1PD is also shifted the first time by setting T1S to “1”
after data is loaded to T1PD.
Figure 6-29 PWM Mode Timing Diagram
6.13.5 16-Bit Mode
In 16-bit timer mode, all function in Timer 1 resolution become 16 bits.
86 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.14 Timer 2
Registers for Timer 2 Circuit
R_BANK Address Name
Bank 2
0X06
TSR
Bank 2
0X09
T2CR
Bank 2
0X0A
T2PD
Bank 2
0X0B
Bit 7
T1MOD
Bit 6
Bit 5
Bit 4
Bit 3
TRCB T1CSS1 T1CSS0 T2CSS
R/W
R/W
R/W
T2IF
T2IE
T2S
R/W
R/W
R/W
R/W
R/W
T2MS1 T2MS0
R/W
R/W
Bit 2
T1S
Bit 1
Bit 0
T1OMS T1OC
R/W
R/W
R/W
T2P2
T2P1
T2P0
R/W
R/W
R/W
PRD2[7] PRD2[6] PRD2[5] PRD2[4] PRD2[3] PRD2[2] PRD2[1] PRD2[0]
T2TD
R/W
R/W
R/W
R/W
R/W
R/W
TD2[7]
TD2[6]
TD2[5]
TD2[4]
TD2[3]
TD2[2]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TD2[1] TD2[0]
R/W
R/W
Figure 6-30 Timer 2 Configuration
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 87
EM78P520N
8-Bit Microprocessor with OTP ROM
6.14.1 Timer Mode
In Timer mode, counting down is performed using the internal clock with prescaler.
When the counter value from T2PD underflows, interrupt is then generated and the
counter is cleared. Counting down resumes after the counter is cleared. The counter
value will automatically reload from T2PD.
Internal Clock
Down-counter
n
T2PD
n
n-1
n-2
n-3
n-4
n-5
3
2
1
underflow
0 n
n-1
n-2
n-3
clear counter
Timer 2 Interrupt
Figure 6-31 Timer Mode Timing Diagram
6.14.2 PWM Mode
In Pulse Width Modulation (PWM) Output mode, counting down is performed using the
internal clock with prescaler or Fsub with frequency. The PWM2 duty cycle is controlled
by T2TD, and the PWM2 period is controlled by T2PD. The pulse at the PWM2 pin is
held to high level as long as the T2TD counter value is greater than or equal to zero while
the pulse is held to low level until the T2PD counter value underflows.
Figure 6-32 PWM Mode Timing Diagram
88 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.15 Code Options
The EM78P520N has one Code Option word that is not part of the normal program
memory. The option bits cannot be accessed during normal program execution.
Code Option Register and Customer ID Register arrangement distribution:
Word 0
Word 1
Word 2
Bit 12~Bit 0
Bit 12~Bit 0
Bit 12~Bit 0
1. Code Option Register (Word 0)
Word 0
Bit
Bit 12 Bit 11
Bit 10 Bit 9 Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3 Bit 2 Bit 1 Bit 0
Mne
TYPE1 TYPE0 LVREN LVR1 LVR0 ENWDTB FSMD FMMD1 FMMD0 HLP
monic
Protect
1
High
High Enable High High Disable High
High
High High
Disable
0
Low
Low Disable Low Low
Low
Low
Enable
Enable
Low
Low
Bits 12~11 (TYPE1~TYPE0): Type Selection for 48 pins or 44 pins.
TYPE1
TYPE0
0
0
Reserved
Type Selection
0
1
Reserved
1
0
EM78P520N (44-pin LQFP/QFP)
1
1
EM78P520N (48-pin LQFP) (default)
Bit 10 (LVREN): Low Voltage Reset Enable Bit
0 : Disable
1 : Enable
Bits 9~8 (LVR1~LVR0): Low Voltage Reset Voltage Select Bits
LVR1
LVR0
Reset Voltage
0
0
2.6V
0
1
3.3V
1
0
3.9V
Bit 7 (ENWDTB): Watchdog Timer Enable Bit
0 : Enable
1 : Disable
Bits 6~4 (FSMD, FMMD1~FMMD0): Oscillator Modes Selection Bits
FSMD
FMMD1
FMMD0
0
0
0
Main Oscillator
Sub Oscillator
RC type (ERIC)
RC type (ERIC)
0
0
1
Crystal type
RC type (ERIC)
0
1
0
PLL type
RC type (ERIC)
0
1
1
PLL type
RC type (ERIC)
1
0
0
RC type (ERIC)
Crystal type
1
0
1
Crystal type
Crystal type
1
1
0
PLL type
Crystal type
1
1
1
Crystal
None
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 89
EM78P520N
8-Bit Microprocessor with OTP ROM
Bit 3 (HLP): Power Consumption Select Bit
0 : Low power consumption, apply to working frequency at 4 MHz or below
4 MHz.
1 : High power consumption, apply to working frequency above 4 MHz.
Bits 2~0 (Protect): Protect Bit
Protect are protect bits, protect type are as follows:
0 : Enable
1 : Disable
2. Code Option Register (Word 1)
Word 1
Bit
Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6
Bit 5
Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
Mne
monic
-
-
-
-
-
-
-
HLFS
-
-
FCB0
FCB1
RESE
TENB
1
-
-
-
-
-
-
-
-
-
High
High
P81
0
-
-
-
-
-
-
-
Main
Oscillator
Sub
Oscillator
-
-
Low
Low
/RE
SET
Bits 12~7: Not used, but must be cleared to “1” all the time to avoid possible error.
Not used, but must be cleared to “0” all the time to avoid possible error.
Bit 6:
Bit 5 (HLFS): Main or Sub Oscillator Select Bit
0 : CPU is selected as sub-oscillator when a reset occurs
1 : CPU is selected as main-oscillator when a reset occurs
Bits 4~3:
Not used, but must be cleared to “1” all the time to avoid possible error.
Bits 2~1 (FCB0~FCB1): Frequency for Crystal (main oscillator) Select Bit
FCB1
FCB0
Operation Frequency
0
0
100k~1M
0
1
1M~6M
1
0
6M~12M
1
1
12M~20M
Bit 0 (RESETENB): Reset Pin Enable Bit
0 : Enable, P81//RESET → /RESET pin
1 : Disable, P81//RESET → P81
3. Customer ID Register (Word 2)
Word 2
Bit 12 Bit 11 Bit 10 Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Customer ID
90 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
6.16 Instruction Set
Each instruction in the Instruction Set is a 13-bit word divided into an OP code and one
or more operand. Normally, all instructions are executed within one single instruction
cycle (one instruction consists of 2 oscillator periods), unless the program counter is
changed by instruction "MOV R2,A", "ADD R2,A", or by instructions of arithmetic or
logic operation on R2 (e.g. "SUB R2,A", "BS(C) R2,6", "CLR R2",⋅⋅⋅). In this case, the
execution takes two instruction cycles.
The following are executed within two instruction cycles; "LJMP", "LCALL", or
conditional skip ("JBS", "JBC", "JZ", "JZA", "DJZ", "DJZA") instructions which were
tested to be true. Instructions written to the program counter are also executed within
two instruction cycles.
In addition, the instruction set has the following features:
(1) Every bit of any register can be set, cleared, or tested directly.
(2) The I/O register can be regarded as general register. That is, the same instruction
can operate on the I/O register.
Convention:
r = Register designator that specifies which one of the registers (including operation and
general purpose registers) is to be utilized by the instruction.
Bits 6 and 7 in R4 determine the selected register bank.
b = Bit field designator that selects the value for the bit located in the register R and which affects
the operation.
k = 8 or 10-bit constant or literal value
Mnemonic
Operation
Status Affected
NOP
No Operation
DAA
Decimal Adjust A
SLEP
0 → WDT, Stop oscillator
T, P
WDTC
0 → WDT
T, P
ENI
Enable Interrupt
None
DISI
Disable Interrupt
None
RET
[Top of Stack] → PC
None
RETI
[Top of Stack] → PC, Enable Interrupt
None
MOV R,A
A→R
None
CLRA
0→A
Z
CLR R
0→R
Z
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
None
C
• 91
EM78P520N
8-Bit Microprocessor with OTP ROM
Mnemonic
Status Affected
SUB A,R
R-A → A
Z, C, DC
SUB R,A
R-A → R
Z, C, DC
DECA R
R-1→A
Z
DEC R
R-1 →R
Z
OR A,R
A ∨ R →A
Z
OR R,A
A∨R→R
Z
AND A,R
A&R→A
Z
AND R,A
A & R →R
Z
XOR A,R
A⊕R→A
Z
XOR R,A
A⊕R→R
Z
ADD A,R
A+R→A
Z, C, DC
ADD R,A
A+R→R
Z, C, DC
MOV A,R
R→A
Z
MOV R,R
R→R
Z
COMA R
/R → A
Z
COM R
/R → R
Z
INCA R
R+1 → A
Z
INC R
R+1 → R
Z
DJZA R
R-1 → A, skip if zero
None
DJZ R
R-1 → R, skip if zero
None
RRCA R
R(n) → A(n-1), R(0) → C, C → A(7)
C
RRC R
R(n) → R(n-1), R(0) → C, C → R(7)
C
RLCA R
R(n) → A(n+1), R(7) → C, C → A(0)
C
RLC R
R(n) → R(n+1), R(7) → C, C → R(0)
C
SWAPA R
SWAP R
JZA R
92 •
Operation
R(0-3) → A(4-7), R(4-7) → A(0-3)
None
R(0-3) ↔ R(4-7)
None
R+1 → A, skip if zero
None
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Mnemonic
Operation
Status Affected
R+1 → R, skip if zero
None
BC R,b
0 → R(b)
None
BS R,b
1 → R(b)
None1
JBC R,b
if R(b)=0, skip
None
JBS R,b
if R(b)=1, skip
None
CALL k
PC+1 → [Stack], (Page, k) → PC
None
LCALL k
PC+1 → [Stack], K → PC
None
JMP k
(Page, k) → PC
None
LJMP k
K → PC
None
k→A
None
JZ R
MOV A,k
OR A,k
A∨k→A
Z
AND A,k
A&k→A
Z
XOR A,k
A⊕k→A
Z
RETL k
k → A, [Top of Stack] → PC
SUB A,k
k-A → A
BANK k
kÆR5(2:0)
ADD A,k
k+A → A
None
Z, C, DC
None
Z, C, DC
1
Note: This instruction cannot operate under interrupt status register.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 93
EM78P520N
8-Bit Microprocessor with OTP ROM
7 Absolute Maximum Ratings
Items
Symbol
Unit
Min.
Max.
VDD
−
2.3
5.5
V
Input voltage
VI
Port 7 ~ Port 9, Port A ~ Port C
GND-0.3
VDD+0.3
V
Output voltage
VO
Port 7 ~ Port 9, Port A ~ Port C
GND-0.3
VDD+0.3
V
Operation temperature
TOPR
−
-40
85
°C
Storage temperature
TSTG
−
-65
150
°C
PD
−
−
500
mW
−
−
32.768K
16M
Hz
Min.
Typ.
Max.
Unit
0.1
−
16
MHz
F-20%
2.2221
F+20%
MHz
-1
0
1
µA
Supply voltage
Power dissipation
Operating Frequency (2clk)
8
Rating
Condition
DC Electrical Characteristics
8.1 DC Electrical Characteristics
„
Symbol
Fc
Parameter
Condition
Crystal: VDD to 5V
Two cycles with two clocks
ERIC: VDD to 5V
R: 51KΩ
Input Leakage Current
for input pins
VIN = VDD, VSS
VIH1
Input High Voltage
(Schmitt Trigger)
Ports 7, 8, 9, A, B, C
0.75VDD
−
VDD+0.3V
V
VIL1
Input Low Voltage
(Schmitt Trigger)
Ports 7, 8, 9, A, B, C
-0.3V
−
0.25VDD
V
VIHT1
Input High Threshold
Voltage (Schmitt Trigger)
/RESET, INT
0.75VDD
−
VDD+0.3V
V
VILT1
Input Low Threshold
Voltage (Schmitt Trigger)
/RESET, INT
-0.3V
−
0.25VDD
V
ERIC
IIL
94 •
Ta= 25°C, VDD= 5.0V±5%, VSS= 0V
VIHX1 Clock Input High Voltage
OSCI in crystal mode
0.75VDD
−
VDD+0.3V
V
VILX1
Clock Input Low Voltage
OSCI in crystal mode
-0.3V
−
0.25VDD
V
IOH1
High Drive Current 1
(Port 9) LED enabled
VOH = VSS+2.1V
8
10
15
mA
IOH2
High Drive Current 2
(Ports 7, 8, 9, A, B, C)
VOH = VDD-0.1VDD
7
9
12
mA
IOL1
Low Sink Current 1
(Port 9) LED enabled
VOL = VDD-2.1
8
10
15
mA
IOL2
Low Sink Current 2
(Ports 7, 8, 9, A, B, C)
VOL = VSS+0.1VDD
16
18
21
mA
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
IPH1
Pull-high current
Pull-high active, input pin at VSS
-70
-75
-80
µA
LVR1
Low Voltage Reset Level
1 (2.6V)
Ta = 25°C
2.31
2.6
2.89
V
Ta = -40°C ~ 85°C
2.04
2.6
3.15
V
LVR2
Low Voltage Reset Level
2 (3.3V)
Ta = 25°C
2.9
3.3
3.72
V
Ta = -40°C ~ 85°C
2.53
3.3
4.05
V
LVR3
Low Voltage Reset Level
3 (3.9V)
Ta = 25°C
3.46
3.9
4.33
V
Ta = -40°C ~ 85°C
3.06
3.9
4.71
V
WDT disabled
−
1.1
−
µA
WDT enabled
−
6.6
−
µA
Stop mode
ISB1
ISB2
Power down current
All input and I/O pins
at VDD
Stop mode
Output pin floating
Power down current
ICC1
Idle mode current
/RESET= 'High', CPU OFF,
Sub-oscillator clock (32.768kHz) ON,
Output pin floating, WDT disabled
−
4.7
−
µA
ICC2
Idle mode current
/RESET= 'High', CPU OFF,
Sub-oscillator clock (32.768kHz) ON,
Output pin floating, WDT enabled,
−
10.3
−
µA
ICC3
Idle mode current
/RESET= 'High', CPU OFF,
Sub-oscillator clock (32.768kHz) ON,
Output pin floating, WDT disabled,
LCD enabled
−
23.7
−
µA
ICC4
Green mode current
/RESET= 'High', CPU ON, used
Sub-oscillator clock (32.768kHz),
Output pin floating, WDT enabled,
−
21.4
−
µA
ICC5
Normal mode
/RESET= 'High', Fosc=4 MHz
(Crystal type, CLKS="0"),
Output pin floating, WDT enabled
−
1.48
−
mA
ICC6
Normal mode
/RESET= 'High', Fosc=16 MHz
(Crystal type, CLKS="0"),
Output pin floating, WDT enabled
−
3.45
−
mA
Ta = 25°C
−
80
−
KΩ
RLCD
LCD Voltage
Dividing Resistor
ILCD1
All LCD lighting
VLCD=5V, exclude CPU core
operation current (not panel)
−
23.3
−
µA
ILCD2
All LCD lighting
VLCD=3V, exclude CPU core
operation current (not panel)
−
12.9
−
µA
Note: 1. These parameters are hypothetical (not tested) and are provided for design reference use only.
2. Data under minimum, typical, and maximum (Min., Typ., and Max.) columns are based on
hypothetical results at 25°C. These data are for design reference only.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 95
EM78P520N
8-Bit Microprocessor with OTP ROM
8.2 A/D Converter Characteristics
„
Symbol
VREF
VSS
VAI
IAI1
IAI2
VDD=2.5V to 5.5V, Vss=0V, Ta=-40 to 85°C
Parameter
Min.
Typ.
Max.
Unit
2.5
−
VDD
V
VSS
−
VSS
V
−
VSS
−
VREF
V
Analog supply current
VDD=VREF=5.0V, VSS = 0.0V
(V reference from VDD)
750
850
1000
µA
-10
0
+10
µA
Analog supply current
VDD=VREF=5.0V, VSS = 0.0V
(V reference from VREF)
500
600
820
µA
200
250
300
µA
−
9
10
Bits
−
11
12
Bits
Analog reference voltage VREF – VSS ≥ 2.5V
Analog input voltage
Ivdd
Ivref
Ivdd
Ivref
Condition
ADREF=0, Internal VDD
RN1
Resolution
RN2
Resolution
LN1
Linearity error
VDD= 2.5 to 5.5V Ta=25°C
0
±4
±8
LSB
LN2
Linearity error
VDD= 2.5 to 5.5V Ta=25°C
0
±2
±4
LSB
DNL
Differential non-linear
error
VDD= 2.5 to 5.5V Ta=25°C
0
±0.5
±0.9
LSB
FSE1
Full scale error
VDD=5.0V, VASS = 0.0V
±0
±4
±8
LSB
FSE2
Full scale error
VDD=VREF=5.0V, VSS = 0.0V
±0
±2
±4
LSB
OE
Offset error
VDD=VREF=5.0V, VSS = 0.0V
±0
±2
±4
LSB
ZAI
Recommended
impedance of analog
voltage source
−
0
8
10
KΩ
ADIV
A/D input voltage range
VDD =VREF=5.0V, VSS = 0.0V
0
−
VREF
V
ADOV
A/D output voltage swing
VDD =VREF=5.0V, VSS = 0.0V,
RL=10KΩ
0
0.2
0.3
4.7
4.8
5
TAD
A/D clock period
VDD=VREF=5.0V, VSS = 0.0V
4
−
−
µs
TCN
A/D conversion time
VDD=VREF=5.0V, VSS = 0.0V
15
−
15
TAD
PSR
Power Supply Rejection
VDD=5.0V±0.5V
±0
−
±2
LSB
VDD=5.0V, VSS = 0.0V
ADREF=1, External VREF
VDD=VREF=5.0V, VSS = 0.0V
V
Note: 1. These parameters are hypothetical (not tested) and are provided for design reference only.
2. There is no current consumption when ADC is off other than minor leakage current.
3. AD conversion result will not decrease when the input voltage is increased, and no missing code
will result.
96 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
8.3 Phase Lock Loop Characteristics
8.3.1 PLL DC Electrical Characteristics
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
VD
Digital Supply Voltage
−
4.5
−
5.5
V
8.3.2 AC Electrical Characteristics
Parameter
Condition
Min
Typ
Max
Unit
−
−
32.768
−
kHz
Input Clock
CLK2
CLK1
CLK0
−
−
−
−
1
1
X
−
15.99
−
MHz
Normal
−
−
600
µA
Power Down Mode
−
−
1
µA
Lock Up Time
−
−
−
200
µs
Settling Time
−
−
3
5
ms
Output Clock
Current Consumption
Note: 1. These parameters are hypothetical (not tested) and are provided for design reference
only.
2. These parameters are subject to change without further notice.
8.4 Device Characteristics
The graphs provided in the following pages were derived based on a limited number of
samples and are shown here for reference only. The device characteristics illustrated
herein are not guaranteed for its accuracy. In some graphs, the data may be out of the
specified warranted operating range.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 97
EM78P520N
8-Bit Microprocessor with OTP ROM
5
Vih/Vil (Input Pins with Inverter)
Vih max (-40°C to 85°C)
4.5
Vih typ 25°C
Vih Vil (Volt)
4
Vih min (-40°C to 85°C)
3.5
3
2.5
2
1.5
Vil max (-40°C to 85°C)
1
Vil typ 25°C
0.5
Vil min (-40°C to 85°C)
0
2.5
2
3
3.5
4
4.5
5
5.5
Vdd (Volt)
Figure 8-1 Vih, Vil vs. VDD
Ioh(mA)
Voh_Ioh(VDD=5V)
0.00
-5.00
-10.00
-15.00
-20.00
-25.00
-30.00
-35.00
-40.00
-45.00
-40°C
25°C
85°C
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Voh (Volt)
Figure 8-2 Voh vs. Ioh, VDD=5V
IOh(mA)
Voh_IOh(VDD=3V)
0.00
-2.00
-4.00
-6.00
-8.00
-10.00
-12.00
-14.00
-16.00
-40°C
25°C
85°C
0
0.5
1
1.5
2
Voh(Volt)
2.5
3
Figure 8-3 Voh vs. Ioh, VDD=3V
98 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Iol(mA)
Vol/Iol(5V)
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
-40°C
25°C
85°C
0
0.5
1
1.5
2 2.5 3
Vol(Volt)
3.5
4
4.5
5
Figure 8-4 Vol vs. Iol, VDD=5V
Iol(mA)
Vol/Iol(3V)
40.00
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
-40°C
25°C
85°C
0
0.5
1
1.5
Vol(Volt)
2
2.5
3
Figure 8-5 Vol vs. Iol, VDD=3V
WDT time out(ms)
WDT Time out
35.00
30.00
-40°C
25°C
85°C
25.00
20.00
15.00
10.00
2
2.5
3
3.5
4
VDD(Volt)
4.5
5
5.5
Figure 8-6 WDT Time out Period vs. VDD, with Prescaler set to 1:1
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 99
EM78P520N
8-Bit Microprocessor with OTP ROM
ERIC FOR MAIN OSC
Frequency(MHz)
2.5
2.0
51K
1.5
100K
1.0
300K
0.5
0.0
2.1
2.5
3
3.5
4
4.5
5
5.5
VDD(volt)
Figure 8-7 ERIC fosc vs. VDD
ERIC FOR SUB OSC
Frequency(KHz)
35.0
34.5
34.0
2.2M
33.5
33.0
32.5
2.1
2.5
3
3.5
4
4.5
5
5.5
VDD(Volt)
Figure 8-8 ERIC fs vs. VDD
1.015
ERC OSC Frequency vs Temp. (Cext=100pF, Rext=5.1K)
Fosc(X°C)/Fosc (25°C)
1.010
1.005
1.000
3V
0.995
5V
0.990
0.985
0.980
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
Temperature (°C)
Figure 8-9 ERIC fosc vs. Temperature
100 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
There are two conditions with the Standby Current ISB1 and ISB2. These conditions
are as follows:
ISB1: WDT disable (Sleep mode)
ISB2: WDT enable (Sleep mode)
Typical ISB1 and ISB2 VS Temperature (VDD=3V)
Current (uA)
4
3
ISB2
2
ISB1
1
0
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-11 Typical Standby Current (VDD=3V) vs. Temperature
Maximum ISB1 and ISB2 VS Temperature (VDD=3V)
Current (uA)
4
3
ISB2
2
ISB1
1
0
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-12 Maximum Standby Current (VDD=3V) vs. Temperature
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 101
EM78P520N
8-Bit Microprocessor with OTP ROM
Typical ISB1 and ISB2 VS. Temperature(VDD=5V)
Current(uA)
8
6
ISB2
4
ISB1
2
0
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-13 Typical Standby Current (VDD=5V) vs. Temperature
Maximum ISB1 and ISB2 VS. Temperature (VDD=5V)
Current (uA)
8
6
ISB2
4
ISB1
2
0
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-14 Maximum Standby Current (VDD=5V) vs. Temperature
Four conditions exist with the Operating Current ICC1 to ICC6. These conditions are
as follows:
ICC1: Fosc = 32.768kHz, 2 clocks, WDT disable (Idle mode)
ICC2: Fosc = 32.768kHz, 2 clocks, WDT enable (Idle mode)
ICC4: Fosc = 32.768kHz, 2 clocks, WDT enable (Green mode)
ICC5: Fosc = 4 MHz, 2 clocks, WDT enable (Normal mode)
102 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Typical ICC1 and ICC2 VS Temperature (VDD=3V)
Current (uA)
7
6
ICC2
5
ICC1
4
3
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-15 Typical Operating Current (VDD=3V) vs. Temperature
Current(uA)
Maximum ICC1 and ICC2 VS. Temperature (VDD=3V)
7
6
ICC2
5
ICC1
4
3
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-16 Maximum Operating Current (VDD=3V) vs. Temperature
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 103
EM78P520N
8-Bit Microprocessor with OTP ROM
Typical ICC1 and ICC2 VS. Temperature (VDD=5V)
Current (uA)
14
12
10
ICC2
8
ICC1
6
4
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-17 Typical Operating Current (VDD=5V) vs. Temperature
Maximum ICC1 and ICC2 VS. Temperature (VDD=5V)
Current (uA)
14
12
10
ICC2
8
ICC1
6
4
-40
-20
0
25
50
70
85
Temperature (°C)
Figure 8-18 Maximum Operating Current (VDD=5V) vs. Temperature
Current (uA)
Typical ICC4 vs. Temperature
30
25
3V
5V
20
15
10
-40
-20
0
20
40
Temperature (°C)
60
80
Figure 8-19 Typical Operating Current vs. Temperature
104 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
Current (uA)
Maximum ICC4 vs. Temperature
35
30
3V
5V
25
20
15
-40
-20
0
20
40
Temperature (°C)
60
80
Figure 8-20 Maximum Operating Current vs. Temperature
Current (mA)
Typical ICC5 vs. Temperature
3
3V
5V
2
1
0
-40
-20
0
20
40
Temperature (°C)
60
80
Figure 8-21 Typical Operating Current vs. Temperature
Current (mA)
Maximum ICC5 vs. Temperature
3
3V
5V
2
1
0
-40
-20
0
20
40
Temperature (°C)
60
80
Figure 8-22 Maximum Operating Current vs. Temperature
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 105
EM78P520N
8-Bit Microprocessor with OTP ROM
9
AC Electrical Characteristics
„
(Ta=- 40°C ~ 85°C, VDD=5V±5%, GND=0V)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
−
45
50
55
%
Dclk
Input CLK duty cycle
Tins
Instruction cycle time
(CLKS="0")
Crystal type
100
−
DC
ns
RC type
500
−
DC
ns
Tdrh
Device reset hold time
Ta = 25°C
11.3
16.2
21.6
ms
Trst
/RESET pulse width
Ta = 25°C
2000
−
−
ns
Twdt
Watchdog timer period
Ta = 25°C
11.3
16.2
21.6
ms
Tset
Input pin setup time
−
−
0
−
ns
Thold
Input pin hold time
−
−
20
−
ns
Tdelay
Output pin delay time
Cload=20pF
−
50
−
ns
I/O delay for EMI enable
Cload=150pF
4
5
6
ns
Tiod
Note: These parameters are theoretical values and have not been tested.
106 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
10 Timing Diagrams
AC Test Input/Output Waveform
Note: AC Testing: Input are driven at VDD-0.5V for logic “1,” and VSS+0.5V for logic “0”
Timing measurements are made at 0.75VDD for logic “1,” and 0.25VDD for logic “0”
Figure 10-1a AC Test Input/Output Waveform Timing Diagram
Reset Timing (CLK="0")
Figure 10-1b Reset Timing Diagram
TCC Input Timing (CLKS="0")
* n = 0, 2, 4, 6
Figure 10-1c TCC Input Timing Diagram
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 107
EM78P520N
8-Bit Microprocessor with OTP ROM
APPENDIX
A Ordering and Manufacturing Information
108 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
B Package Type
OTP MCU
Package Type
Pin Count
Package Size
EM78P520NQ44J/S
QFP
44
10mm × 10mm
EM78P520NL44J/S
LQFP
44
10mm × 10mm
EM78P520NL48J/S
LQFP
48
7mm × 7mm
These are Green products which do not contain hazardous substances and comply
with the third edition of Sony SS-00259 standard.
Pb content is less than 100ppm and complies with Sony specifications.
Part No.
EM78P520NxJ/xS
Electroplate type
Pure Tin
Ingredient (%)
Sn:100%
Melting point (°C)
232°C
Electrical resistivity
( µΩ-cm )
11.4
Hardness (hv)
8~10
Elongation (%)
>50%
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 109
EM78P520N
8-Bit Microprocessor with OTP ROM
C Package Information
C.1 EM78P520NQ44
c
Symbol
A
A1
A2
b
c
E1
E
L
L1
e
θ
Min.
0.15
1.80
13.00
9.90
0.73
1.50
Normal
2.00
0.30(TYP)
0.15(TYP)
13.20
10.00
0.88
1.60
0.80(TYP)
Max.
2.70
0.50
2.20
13.40
10.10
1.03
1.70
0
7
TITLE:
QFP-44L(10*10 MM) FOOTPRINT 3.2mm
PACKAGE OUTLINE DIMENSION
File :
QFP44
Edtion: A
Unit : mm
Scale: Free
Material:
Sheet:1 of 1
Figure B-3 EM78P520N 44-pin QFP Package Type
110 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
C.2 EM78P520NL44
c
Symbol
A
A1
A2
b
c
E1
E
L
L1
e
θ
Min .
Normal
0.050
1.350
0.300
0.090
1.400
0.370
Max .
1.600
0.150
1.450
0.450
0.200
12.00 BASIC
10.00 BASIC
0.450
0.600
0.750
1.0 (BASIC)
0.8 (BASIC)
0
3.5
7
TITLE:
LQFP-44L (10*10 MM) FOOTPRINT 2.0mm
PACKAGE OUTLINE DIMENSION
File :
LQFP44
Edtion: A
Unit : mm
Scale: Free
Material:
Sheet:1 of 1
Figure B-4 EM78P520N 44-pin LQFP Package Type
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 111
EM78P520N
8-Bit Microprocessor with OTP ROM
E
E1
C.3 EM78P520NL48
Symbol
A
A1
A2
b
b1
c
c1
D
D1
E
E1
e
L
L1
θ
Min.
0.05
1.35
0.17
0.17
0.09
0.09
0.45
0°
Normal
1.40
0.22
0.20
9.00BCS
7.00BSC
9.00BSC
7.00BSC
0.50BSC
0.60
1.00 REF
3.5°
Max.
1.60
0.15
1.45
0.27
0.23
0.20
0.160
0.75
7°
Figure B-5 EM78P520N 48-pin LQFP Package Type
112 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
D Quality Assurance and Reliability
Test Category
Test Conditions
Remarks
Solder temperature=245±5°C, for 5 seconds up to the
stopper using a rosin-type flux
Solderability
Step 1: TCT, 65°C (15mins)~150°C (15min), 10 cycles
Step 2: Bake at 125°C, TD (endurance) = 24 hrs
Step 3: Soak at 30°C/60% , TD (endurance) = 192 hrs
Step 4: IR flow 3 cycles
Pre-condition
(Pkg thickness ≥ 2.5mm or
3
Pkg volume ≥ 350mm ----225±5°C)
For SMD IC (such as
SOP, QFP, SOJ, etc)
(Pkg thickness ≤ 2.5mm or
3
Pkg volume ≤ 350mm ----240±5°C )
Temperature cycle test
-65°C (15min)~150°C (15min), 200 cycles
Pressure cooker test
TA =121°C, RH=100%, pressure = 2 atm,
TD (endurance)= 96 hrs
High temperature /
High humidity test
TA=85°C , RH=85% , TD (endurance) = 168 , 500 hrs
High-temperature
storage life
TA=150°C, TD (endurance) = 500, 1000 hrs
High-temperature
operating life
TA=125°C, VDD=Max. operating voltage,
TD (endurance) =168, 500, 1000 hrs
Latch-up
TA=25°C, VDD=Max. operating voltage, 150mA/20V
ESD (HBM)
TA=25°C, ≥ | ± 3KV |
IP_ND,OP_ND,IO_ND
IP_NS,OP_NS,IO_NS
IP_PD,OP_PD,IO_PD,
ESD (MM)
TA=25°C, ≥ | ± 300V |
IP_PS,OP_PS,IO_PS,
VDD-VSS(+),VDD_VSS
(-) mode
D.1 Address Trap Detect
An address trap detect is one of the MCU embedded fail-safe functions that detects
MCU malfunction caused by noise or the like. Whenever the MCU attempts to fetch an
instruction from a certain section of ROM, an internal recovery circuit is auto started. If
a noise caused address error is detected, the MCU will repeat execution of the program
until the noise is eliminated. The MCU will then continue to execute the next program.
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 113
EM78P520N
8-Bit Microprocessor with OTP ROM
E
EM78P520N Program Pin List
DWTR is used to program the EM78P520N IC’s. The connector of DWTR is selected
by CON3 (EM78P447). The software is selected by EM78P520N.
F
LQFP-48
L/QFP-44
Pin Number
Pin Number
P75
2
2
Pin #30
P76
3
3
Pin #28
P77
4
4
Pin #8
VDD
5
5
Pin #10
VSS
6
6
Pin #34
TEST
9
9
Pin #29
PC2
10
10
Pin #32
PC3
11
11
Program Pin Name
IC Pin Name
Pin #31
ICE 520 Oscillator Circuit (JP4)
F.1 Mode 1
Main oscillator: Crystal mode, Sub oscillator: Crystal mode
Crystal
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
JP4
Crystal
114 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
EM78P520N
8-Bit Microprocessor with OTP ROM
F.2 Mode 2
Main oscillator: PLL mode, Sub oscillator: Crystal mode
Crystal
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
JP4
PLL
F.3 Mode 3
Main oscillator: ERIC mode, Sub oscillator: Crystal mode
Crystal
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
JP4
ERIC
F.4 Mode 4
Main oscillator: Crystal mode, Sub oscillator: ERIC mode
ERIC
JP4
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
Crystal
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)
• 115
EM78P520N
8-Bit Microprocessor with OTP ROM
F.5 Mode 5
Main oscillator: PLL mode, Sub oscillator: RC mode
ERIC
JP4
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
PLL
F.6 Mode 6
Main oscillator: RC mode, Sub oscillator: RC mode
ERIC
JP4
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
ERIC
F.7 Mode 7
Main oscillator: Crystal mode, Sub oscillator: None
None
JP4
GND
Xin
Xout
GND
VDD
Xin
Sub oscillator
GND
OSCI
OSCO
GND
VDD
OSCI
Main oscillator
Crystal
116 •
Product Specification (V1.3) 02.05.2014
(This specification is subject to change without further notice)