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W78ERD2 PDF даташит

Спецификация W78ERD2 изготовлена ​​​​«nuvoton» и имеет функцию, называемую «8-BIT MICROCONTROLLER».

Детали детали

Номер произв W78ERD2
Описание 8-BIT MICROCONTROLLER
Производители nuvoton
логотип nuvoton логотип 

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W78ERD2 Даташит, Описание, Даташиты
W78ERD2/W78ERD2A Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION.......................................................................................................... 3
2. FEATURES ................................................................................................................................. 3
3. PIN CONFIGURATIONS............................................................................................................. 4
4. PIN DESCRIPTION..................................................................................................................... 5
5. FUNCTIONAL DESCRIPTION.................................................................................................... 6
5.1 RAM ................................................................................................................................ 6
5.2 Timers/Counters ............................................................................................................. 6
5.3 Clock ............................................................................................................................... 7
5.4 Power Management........................................................................................................ 7
5.5 Reduce EMI Emission..................................................................................................... 7
5.6 Reset............................................................................................................................... 7
6. SPECIAL FUNCTION REGISTER .............................................................................................. 8
7. PORT 4 AND BASE ADDRESS REGISTERS .......................................................................... 30
8. INTERRUPTS ........................................................................................................................... 32
8.1 External Interrupts 2 and 3............................................................................................ 32
8.2 Interrupt Priority............................................................................................................. 32
9. PROGRAMMABLE TIMERS/COUNTERS................................................................................ 33
9.1 Timer 0 and Timer 1 ..................................................................................................... 33
9.2 Timer/Counter 2 ............................................................................................................ 35
10. ENHANCED FULL DUPLEX SERIAL PORT ............................................................................ 38
10.1 MODE 0 ........................................................................................................................ 38
10.2 MODE 1 ........................................................................................................................ 39
10.3 MODE 2 ........................................................................................................................ 40
10.4 MODE 3 ........................................................................................................................ 41
10.5 Framing Error Detection................................................................................................ 42
10.6 Multi-Processor Communications ................................................................................. 42
11. PROGRAMMABLE COUNTER ARRAY (PCA)......................................................................... 44
11.1 PCA Capture Mode ....................................................................................................... 47
11.2 16-bit Software Timer Comparator Mode ..................................................................... 47
11.3 High Speed Output Mode.............................................................................................. 48
11.4 Pulse Width Modulator Mode........................................................................................ 49
11.5 Watchdog Timer ........................................................................................................... 49
12. HARDWARE WATCHDOG TIMER (ONE-TIME ENABLED WITH RESET-OUT) ................... 50
Publication Release Date: March 2, 2009
- 1 - Revision A12









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W78ERD2 Даташит, Описание, Даташиты
W78ERD2/W78ERD2A
13. DUAL DPTR .............................................................................................................................. 50
14. TIMED-ACCESS PROTECTION .............................................................................................. 51
15. IN-SYSTEM PROGRAMMING (ISP) MODE............................................................................. 53
16. H/W REBOOT MODE (BOOT FROM LDROM)........................................................................ 57
17. OPTION BITS REGISTER ........................................................................................................ 58
18. ELECTRICAL CHARACTERISTICS ......................................................................................... 60
18.1 Absolute Maximum Ratings .......................................................................................... 60
18.2 D.C. Characteristics ...................................................................................................... 60
18.3 A.C. Characteristics ...................................................................................................... 62
19. TIMING WAVEFORMS ............................................................................................................. 64
20. TYPICAL APPLICATION CIRCUITS......................................................................................... 66
20.1 External Program Memory and Crystal......................................................................... 66
20.2 Expanded External Data Memory and Oscillator .......................................................... 67
21. PACKAGE DIMENSIONS ......................................................................................................... 68
22. APPLICATION NOTE................................................................................................................ 70
22.1 In-System Programming (ISP) Software Examples...................................................... 70
22.2 How to Use Programmable Counter Array ................................................................... 74
23. REVISION HISTORY ................................................................................................................ 75
Publication Release Date: March 2, 2009
- 2 - Revision A12









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W78ERD2 Даташит, Описание, Даташиты
W78ERD2/W78ERD2A
1. GENERAL DESCRIPTION
The W78ERD2 is an 8-bit microcontroller which is pin- and instruction-set-compatible with the standard
80C52. The W78ERD2 contains a 64-KB Flash EPROM whose contents may be updated in-system by
a loader program stored in an auxiliary, 4-KB Flash EPROM. Once the contents are confirmed, it can
be protected for security.
The W78ERD2 also contains 256 bytes of on-chip RAM; 1 KB of auxiliary RAM; four 8-bit, bi-
directional and bit-addressable I/O ports; an additional 4-bit port P4; three 16-bit timer/counters; and a
serial port. These peripherals are all supported by nine interrupt sources with 4 levels of priority.
The W78ERD2 has two power-reduction modes: idle mode and power-down mode, both of which are
software-selectable. Idle mode turns off the processor clock but allows peripherals to continue
operating, while power-down mode stops the crystal oscillator for minimum power consumption.
Power-down mode can be activated at any time and in any state without affecting the processor.
2. FEATURES
8-bit CMOS microcontroller
Pin-compatible with standard 80C52
Instruction-set compatible with 80C52
Four 8-bit I/O ports; Port 0 has internal pull-up resisters enabled by software.
One extra 4-bit I/O port with interrupt and chip-select functions
Three 16-bit timers
Programmable clock out
Programmable Counter Array (PCA) with PWM, Capture, Compare and Watchdog functions
9 interrupt sources with 4 levels of priority
Full-duplex serial port with framing-error detection and automatic address recognition
64-KB, in-system-programmable, Flash EPROM (AP Flash EPRAOM)
4-KB auxiliary Flash EPROM for loader program (LD Flash EPROM)
256-byte on-chip RAM
1-KB auxiliary RAM, software-selectable
Software Reset
12 clocks per machine cycle operation (default). Speed up to 40 MHz.
6 clocks per machine cycle operation set by the writer. Speed up to 20 MHz.
2 DPTR registers
Low EMI (inhibit ALE)
Built-in power management with idle mode and power down mode
Code protection
Packages:
Lead Free (RoHS) DIP 40: W78ERD2A40DL
Lead Free (RoHS) PLCC 44: W78ERD2A40PL
Lead Free (RoHS) PQFP 44: W78ERD2A40FL
Publication Release Date: March 2, 2009
- 3 - Revision A12










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