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W78L51F-24のメーカーはWinbondです、この部品の機能は「8-BIT MICROCONTROLLER」です。 |
部品番号 | W78L51F-24 |
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部品説明 | 8-BIT MICROCONTROLLER | ||
メーカ | Winbond | ||
ロゴ | |||
このページの下部にプレビューとW78L51F-24ダウンロード(pdfファイル)リンクがあります。 Total 18 pages
W78L51
8-BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W78L51 microcontroller supplies a wider frequency and supply voltage range than most 8-bit
microcontrollers on the market. It is compatible with the industry standard 80C51 microcontroller
series.
The W78L51 contains four 8-bit bidirectional parallel ports, one extra 4-bit bit-addressable I/O port
(Port 4) and two additional external interrupts (INT2 , INT3 ), two 16-bit timer/counters, one watchdog
timer and a serial port. These peripherals are supported by a seven-source, two-level interrupt
capability. There are 128 bytes of RAM and an 4K byte mask ROM for application programs.
The W78L51 microcontroller has two power reduction modes, idle mode and power-down mode, both
of which are software selectable. The idle mode turns off the processor clock but allows for continued
peripheral operation. The power-down mode stops the crystal oscillator for minimum power
consumption. The external clock can be stopped at any time and in any state without affecting the
processor.
FEATURES
• Fully static design
• Supply voltage of 1.8V to 5.5V
• DC-24 MHz operation
• 128 bytes of on-chip scratchpad RAM
• 4K bytes of on-chip mask ROM
• 64K bytes program memory address space
• 64K bytes data memory address space
• Four 8-bit bidirectional ports
• Two 16-bit timer/counters
• One full duplex serial port
• Seven-source, two-level interrupt capability
• One extra 4-bit bit-addressable I/O port
• Two additional external interrupts INT2 / INT3
• Watchdog timer
• EMI reduction mode
• Built-in power management
• Code protection
• Packages:
− DIP 40: W78L51-24
− PLCC 44: W78L51P-24
− QFP 44: W78L51F-24
Publication Release Date: January 1999
- 1 - Revision A2
1 Page W78L51
PIN DESCRIPTION
P0.0−P0.7
Port 0, Bits 0 through 7. Port 0 is a bidirectional I/O port. This port also provides a multiplexed low
order address/data bus during accesses to external memory.
P1.0−P1.7
Port 1, Bits 0 through 7. Port 1 is a bidirectional I/O port with internal pull-ups.
P2.0−P2.7
Port 2, Bits 0 through 7. Port 2 is a bidirectional I/O port with internal pull-ups. This port also provides
the upper address bits for accesses to external memory.
P3.0−P3.7
Port 3, Bits 0 through 7. Port 3 is a bidirectional I/O port with internal pull-ups. All bits have alternate
functions, which are described below:
PIN
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
ALTERNATE FUNCTION
RXD Serial Receive Data
TXD Serial Transmit Data
INT0 External Interrupt 0
INT1 External Interrupt 1
T0 Timer 0 Input
T1 Timer 1 Input
WR Data Write Strobe
RD Data Read Strobe
P4.0−P4.3
Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are alternative function pins. It can
be used as general I/O pins or external interrupt input sources (INT2 / INT3 ).
EA
External Address Input, active low. This pin forces the processor to execute out of external ROM.
This pin should be kept low for all W78C31 operations.
RST
Reset Input, active high. This pin resets the processor. It must be kept high for at least two machine
cycles in order to be recognized by the processor.
Publication Release Date: January 1999
- 3 - Revision A2
3Pages W78L51
New Defined Peripheral
In order to be more suitable for I/O, an extra 4-bit bit-addressable port P4 and two external interrupts
INT2 , INT3 have been added to either the PLCC or QFP package. And description follows:
1. INT2 / INT3
Two additional external interrupts, INT2 and INT3 , whose functions are similar to those of external
interrupt 0 and 1 in the standard 80C52. The functions/status of these interrupts are
determined/shown by the bits in the XICON (External Interrupt Control) register. The XICON register
is bit-addressable but is not a standard register in the standard 80C52. Its address is at 0C0H. To
set/clear bits in the XICON register, one can use the "SETB (/CLR) bit" instruction. For example,
"SETB 0C2H" sets the EX2 bit of XICON.
***XICON - external interrupt control (C0H)
PX3 EX3 IE3 IT3 PX2 EX2 IE2 IT2
PX3: External interrupt 3 priority high if set
EX3: External interrupt 3 enable if set
IE3: If IT3 = 1, IE3 is set/cleared automatically by hardware when interrupt is detected/serviced
IT3: External interrupt 3 is falling-edge/low-level triggered when this bit is set/cleared by software
PX2: External interrupt 2 priority high if set
EX2: External interrupt 2 enable if set
IE2: If IT2 = 1, IE2 is set/cleared automatically by hardware when interrupt is detected/serviced
IT2: External interrupt 2 is falling-edge/low-level triggered when this bit is set/cleared by software
Seven-source interrupt informations:
INTERRUPT
SOURCE
External Interrupt 0
Timer/Counter 0
External Interrupt 1
Timer/Counter 1
Serial Port
External Interrupt 2
External Interrupt 3
VECTOR
ADDRESS
03H
0BH
13H
1BH
23H
33H
3BH
POLLING
SEQUENCE WITHIN
PRIORITY LEVEL
ENABLE
REQUIRED
SETTINGS
0 (highest)
IE.0
1 IE.1
2 IE.2
3 IE.3
4 IE.4
5 XICON.2
6 (lowest)
XICON.6
INTERRUPT
TYPE
EDGE/LEVEL
TCON.0
-
TCON.2
-
-
XICON.0
XICON.3
-6-
6 Page | |||
ページ | 合計 : 18 ページ | ||
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PDF ダウンロード | [ W78L51F-24 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
W78L51F-24 | 8-BIT MICROCONTROLLER | Winbond |