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PDF EM78P141 Data sheet ( Hoja de datos )
| Número de pieza | EM78P141 | |
| Descripción | 8-Bit Microprocessor | |
| Fabricantes | ELAN Microelectronics | |
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EM78P141
8-Bit Microprocessor
with OTP ROM
Product
Specification
DOC. VERSION 1.1
ELAN MICROELECTRONICS CORP.
December 2009
1 page  
Contents
6.9 Timer .............................................................................................................. 55
6.9.1 Overview ...........................................................................................................55
6.9.2 Function Description .........................................................................................56
6.9.3 Programming the Related Registers .................................................................56
6.9.4 Timer Programming Process/Steps ..................................................................57
6.9.5 Timer Cascade Mode ........................................................................................57
6.10 Comparator..................................................................................................... 57
6.10.1 Comparator Reference Signal...........................................................................58
6.10.2 Comparator Outputs..........................................................................................59
6.10.3 Comparator Interrupt .........................................................................................60
6.10.4 Wake-up from Sleep Mode................................................................................60
6.11 Oscillator......................................................................................................... 61
6.11.1 Oscillator Modes ...............................................................................................61
6.11.2 Crystal Oscillator/Ceramic Resonators (Crystal) ..............................................61
6.11.3 External RC Oscillator Mode.............................................................................62
6.11.4 Internal RC Oscillator Mode ..............................................................................63
6.12 Power-On Considerations............................................................................... 64
6.12.1 Programmable WDT Time-out Period ...............................................................64
6.12.2 External Power-on Reset Circuit .......................................................................64
6.12.3 Residual Voltage Protection ..............................................................................65
6.13 Code Option ................................................................................................... 66
6.13.1 Code Option Register (Word 0).........................................................................66
6.13.2 Code Option Register (Word 1).........................................................................67
6.13.3 Customer ID Register (Word 2).........................................................................68
6.14 Low Voltage Detector...................................................................................... 68
6.14.1 Low Voltage Reset (LVR) ..................................................................................69
6.14.2 Low Voltage Detector (LVD) ..............................................................................69
6.14.2.1 R6 (LVD Control Register)
69
6.14.3 Programming Process.......................................................................................70
6.15 Instruction Set................................................................................................. 72
7 Absolute Maximum Ratings........................................................................ 74
8 DC Electrical Characteristics...................................................................... 74
8.1 AD Converter Characteristics.......................................................................... 76
8.2 Comparator Characteristics ............................................................................ 77
9 AC Electrical Characteristics...................................................................... 78
10 Timing Diagrams ......................................................................................... 79
Product Specification (V1.1) 12. 16.2009
•v
5 Page 
EM78P141
8-Bit Microprocessor with OTP ROM
The configuration structure generates 1K×13 bits on-chip ROM addresses to the
relative programming instruction codes. One program page is 1024 words long.
The contents of R2 are all set to "0"s when a reset condition occurs.
"JMP" instruction allows direct loading of the lower 10 program counter bits. Thus,
"JMP" allows the PC to jump to any location within a page.
"CALL" instruction loads the lower 10 bits of the PC, and then PC+1 is pushed onto
the stack. Thus, the subroutine entry address can be located anywhere within a
page.
"RET" ("RETL k", "RETI") instruction loads the program counter with the contents
of the top of stack.
"ADD R2, A" allows a relative address to be added to the current PC, and the ninth
and above bits of the PC will increase progressively.
"MOV R2, A" allows loading of an address from the "A" register to the lower 8 bits of
the PC, and the ninth and tenth bits (A8 ~ A9) of the PC will remain unchanged.
Any instruction (except “ADD R2,A”) that is written to R2 (e.g., "MOV R2, A", "BC
R2, 6", etc.) will cause the ninth bit and the tenth bit (A8 ~ A9) of the PC to remain
unchanged.
All instructions are single instruction cycle (fclk/2).
Product Specification (V1.1) 12. 16.2009
(This specification is subject to change without further notice)
•5
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM78P141.PDF ] | |
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