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參數資料
型號: W77E516
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數: 5/85頁
文件大小: 596K
代理商: W77E516
Preliminary W77E516
Publication Release Date: August 16, 2002
- 5 -
Revision A1
4. PIN DESCRIPTION
SYMBOL
TYPE
DESCRIPTIONS
EA
I
EXTERNAL ACCESS ENABLE
: It should be kept high for internal program
access..
O
PROGRAM STORE ENABLE
: PSEN enables the external ROM data onto
the Port 0 address/data bus during fetch and MOVC operations.
O
ADDRESS LATCH ENABLE
: ALE is used to enable the address latch that
separates the address from the data on Port 0.
RESET
: A high on this pin for two machine cycles while the oscillator is running
resets the device.
CRYSTAL1
: This is the crystal oscillator input. This pin may be driven by an
external clock.
O
CRYSTAL2
: This is the crystal oscillator output. It is the inversion of XTAL1.
I
GROUND
: Ground potential
I
POWER SUPPLY
: Supply voltage for operation.
I/O
PORT 0
: Port 0 is an open-drain bi-directional I/O port. This port also provides
a multiplexed low order address/data bus during accesses to external memory.
PORT 1
: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have
alternate functions which are described below:
T2(P1.0): Timer/Counter 2 external count input
T2EX(P1.1): Timer/Counter 2 Reload/Capture/Direction control
RXD1(P1.2): Serial port 1 RXD
TXD1(P1.3): Serial port 1 TXD
INT2(P1.4): External Interrupt 2
INT3 (P1.5): External Interrupt 3
INT4(P1.6): External Interrupt 4
INT5 (P1.7): External Interrupt 5
I/O
PORT 2
: Port 2 is a bi-directional I/O port with internal pull-ups. This port also
provides the upper address bits for accesses to external memory.
PORT 3
: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have
alternate functions, which are described below:
RXD(P3.0): Serial Port 0 input
TXD(P3.1): Serial Port 0 output
INT0 (P3.2): External Interrupt 0
INT1(P3.3): External Interrupt 1
T0(P3.4): Timer 0 External Input
T1(P3.5): Timer 1 External Input
WR(P3.6): External Data Memory Write Strobe
RD(P3.7): External Data Memory Read Strobe
PORT 4:
Port 4 is a 4-bit bi-directional I/O port. The P4.0 also provides the
alternate function WAIT which is the wait state control signal.
* Note:
TYPE
I: input, O: output, I/O: bi-directional.
PSEN
ALE
RST
I
XTAL1
I
XTAL2
V
SS
V
DD
P0.0
P0.7
P1.0
P1.7
I/O
P2.0
P2.7
P3.0
P3.7
I/O
P4.0
P4.3
I/O
相關PDF資料
PDF描述
W77E516-25 8-BIT MICROCONTROLLER
W77E516-40 8-BIT MICROCONTROLLER
W77E516F-25 8-BIT MICROCONTROLLER
W77E516F-40 8-BIT MICROCONTROLLER
W77E516P-25 8-BIT MICROCONTROLLER
相關代理商/技術參數
參數描述
W77E516-25 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W77E516-40 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
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