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W78IRD2 の電気的特性と機能

W78IRD2のメーカーはnuvotonです、この部品の機能は「8-BIT MICROCONTROLLER」です。


製品の詳細 ( Datasheet PDF )

部品番号 W78IRD2
部品説明 8-BIT MICROCONTROLLER
メーカ nuvoton
ロゴ nuvoton ロゴ 




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W78IRD2 Datasheet, W78IRD2 PDF,ピン配置, 機能
W78IRD2 Data Sheet
Table of Contents-
8-BIT MICROCONTROLLER
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...................................................................... 48
11.3 High Speed Output Mode.............................................................................................. 48
11.4 Pulse Width Modulator Mode ........................................................................................ 49
11.5 Watchdog Timer............................................................................................................ 50
12. HARDWARE WATCHDOG TIMER (ONE-TIME ENABLED WITH RESET-OUT) ................... 51
13. DUAL DPTR .............................................................................................................................. 51
14. TIMED-ACCESS PROTECTION............................................................................................... 52
Publication Release Date: October 2, 2006
- 1 - Revision A7

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W78IRD2 pdf, ピン配列
W78IRD2
1. GENERAL DESCRIPTION
The W78IRD2 is an 8-bit microcontroller which is pin- and instruction-set-compatible with the standard
80C52. The W78IRD2 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 W78IRD2 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 W78IRD2 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 20 MHz.
6 clocks per machine cycle operation set by the writer. Speed up to 12 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: W78IRD2A25DL
Lead Free (RoHS) PLCC 44: W78IRD2A25PL
Publication Release Date: October 2, 2006
- 3 - Revision A7


3Pages


W78IRD2 電子部品, 半導体
W78IRD2
5. FUNCTIONAL DESCRIPTION
The W78IRD2 architecture consists of a core processor that supports 111 different op-codes and
references 64 KB of program space and 64 KB of data space. It is surrounded by various registers;
four general-purpose I/O ports; one special-purpose, programmable, 4-bit I/O port; 256 bytes of RAM;
1 KB of auxiliary RAM (AUX-RAM); three timer/counters; a serial port; and an internal 74373 latch and
74244 buffer which can be switched to port 2.
This section introduces the RAM, Timers/Counters, Clock, Power Management, Reduce EMI
Emission, and Reset.
5.1 RAM
The W78IRD2 has two banks of RAM: 256 bytes of RAM and 1 KB of AUX-RAM. AUX-RAM is enabled
by clearing bit 1 in the AUXR register, and it is enabled after reset. Different addresses in RAM are
addressed in different ways.
RAM 00H 7FH can be addressed directly or indirectly, as in the 8051. The address pointers are R0
and R1 of the selected bank.
RAM 80H FFH can only be addressed indirectly, as in the 8051. The address pointers are R0 and
R1 of the selected bank.
AUX-RAM 00H 3FFH is addressed indirectly in the same way external data memory is accessed
with the MOVX instruction. The address pointers are R0 and R1 of the selected bank and the DPTR
register.
Addresses higher than 3FFH are stored in external memory and are accessed indirectly with the
MOVX instruction, as in the 8051.
When AUX-RAM is enabled, the instruction "MOVX @Ri" always accesses AUX-RAM. When the
W78IRD2 is executing instructions from internal program memory, accessing AUX-RAM does not
affect ports P0, P2, WR or RD .
For example,
ANL
MOV
MOV
MOVX
AUXR,#11111101B
DPTR,#1234H
A,#56H
@DPTR,A
; Enable AUX-RAM
; Write 56h to address 1234H in external memory
MOV XRAMAH,#02H
; Only 2 LSB effective
MOV R0,#34H
MOV A,@R0
; Read AUX-RAM data at address 0234H
5.2 Timers/Counters
The W78IRD2 has three timers/counters called Timer 0, Timer 1, and Timer 2. Each timer/counter
consists of two 8-bit data registers: TL0 and TH0 for Timer 0, TL1 and TH1 for Timer 1, and TL2 and
TH2 for Timer 2.
The operations of Timer 0 and Timer 1 are similar to those in the W78C52, and these timers are
controlled by the TCON and TMOD registers.
Timer 2 is controlled by the T2CON register. Like Timers 0 and 1, Timer 2 can operate as either an
external event counter or an internal timer, depending on the setting of bit C/T2 in T2CON. Timer 2 has
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共有リンク

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