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PDF EM78P142 Data sheet ( Hoja de datos )
| Número de pieza | EM78P142 | |
| Descripción | 8-Bit Microprocessor | |
| Fabricantes | ELAN Microelectronics | |
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EM78P142
8-Bit Microprocessor
with OTP ROM
Product
Specification
DOC. VERSION 1.2
ELAN MICROELECTRONICS CORP.
April 2013
1 page  
Contents
6.10 Oscillator .......................................................................................................... 60
6.10.1 Oscillator Modes ...............................................................................................60
6.10.2 Crystal Oscillator/Ceramic Resonators (Crystal) ..............................................61
6.10.3 External RC Oscillator Mode.............................................................................64
6.10.4 Internal RC Oscillator Mode..............................................................................65
6.11 Power-on Considerations ................................................................................. 66
6.11.1 Programmable WDT Time-out Period...............................................................66
6.11.2 External Power-on Reset Circuit.......................................................................66
6.11.3 Residual Voltage Protection..............................................................................67
6.12 Code Option ..................................................................................................... 68
6.12.1 Code Option Register (Word 0) ........................................................................68
6.12.2 Code Option Register (Word 1) ........................................................................70
6.12.3 Customer ID Register (Word 2) ........................................................................71
6.13 Low Voltage Detector/Low Voltage Reset ........................................................ 72
6.13.1 Low Voltage Reset ............................................................................................72
6.13.2 Low Voltage Detector ........................................................................................72
6.13.2.1 IOCD1 (LVD Control Register)...........................................................72
6.13.2.2 RE (Interrupt Status 2 and Wake-up Control Register)......................73
6.13.3 Programming Process ......................................................................................74
6.14 Instruction Set .................................................................................................. 75
7 Absolute Maximum Ratings ................................................................................... 77
8 DC Electrical Characteristics ................................................................................. 77
8.1 AD Converter Characteristic............................................................................. 80
8.2 Device Characteristics...................................................................................... 81
9 AC Electrical Characteristic ................................................................................... 82
10 Timing Diagrams ..................................................................................................... 83
APPENDIX
A Package Type........................................................................................................... 84
B Packaging Configuration........................................................................................ 85
B.1 EM78P142SS10............................................................................................... 85
C Quality Assurance and Reliability ......................................................................... 86
C.1 Address Trap Detect......................................................................................... 86
D How to Use the ICE 341N........................................................................................ 87
E Comparison between V-Package and U-Package Version .................................. 90
EM78P142-V Package.............................................................................................. 90
EM78P142-U Package.............................................................................................. 90
Product Specification (V1.2) 04.17.2013
•v
5 Page 
EM78P142
8-Bit Microprocessor with OTP ROM
6 Functional Description
6.1 Operational Registers
6.1.1 R0 (Indirect Address Register)
R0 is not a physically implemented register. It is used as an indirect address pointer.
Any instruction using R0 as a pointer, actually accesses the data pointed by the RAM
Select Register (R4).
6.1.2 R1 (Time Clock)
Incremented by the instruction cycle clock.
Writable and readable as any other registers.
The TCC prescaler counter (IOCC1) is assigned to TCC
The contents of the IOCC1 register is cleared whenever –
• a value is written to the TCC register.
• a value is written to the TCC prescaler bits (Bits 3, 2, 1, 0 of the CONT register)
• there is power-on reset, /RESET, or WDT time out reset.
6.1.3 R2 (Program Counter) and Stack
R3
A10 A9 A8
A7 ~ A0
CALL
RET
RETL
RETI
0 PAGE0 0000~03FF Stack Level 1
1 PAGE1 0400~07FF Stack Level 2
Stack Level 3
Stack Level 4
Stack Level 5
Stack Level 6
Stack Level 7
Stack Level 8
Reset Vector
Hardware Interrupt Vector
000H
003H
~
021H
On-chip Program
Memory
7FFH
Figure 6-1 Program Counter Organization
Product Specification (V1.2) 04.17.2013
(This specification is subject to change without further notice)
•5
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM78P142.PDF ] | |
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