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MV20556 Folha de dados(PDF) 3 Page - Mosel Vitelic, Corp

Nome de Peças MV20556
Descrição Electrónicos  8 - Bit MCU Mouse Controller
Download  30 Pages
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Fabricante Electrônico  MOSEL [Mosel Vitelic, Corp]
Página de início  http://www.moselvitelic.com
Logo MOSEL - Mosel Vitelic, Corp

MV20556 Folha de dados(HTML) 3 Page - Mosel Vitelic, Corp

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MV20556
MOSEL VITELIC INC.
3/27
PID256** 07/97
Specifications subject to change without notice, contact your sales representatives for the most recent information.
Preliminary
Pin Descriptions
20L
PDIP
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Active
L/-
L/-
I/O
i
i/o
i/o
i
o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
Names
Reset
bit 0 of Port 3 & Receive data
bit 1 of Port 3 & Transmit data
Crystal out
Crystal in
bit 2 of Port 3 & low true Interrupt 0
bit 3 of Port 3 & low true Interrupt 1
bit 4 of Port 3 & external input to Timer 0
bit 5 of Port 3 & external input to Timer 1
Sink Voltage, Ground
bit 7 of Port 3
bit 0 of Port 1
bit 1 of Port 1
bit 2 of Port 1
bit 3 of Port 1
bit 4 of Port 1
bit 5 of Port 1
bit 6 of Port 1
bit 7 of Port 1
Drive Voltage, +5 Vcc
Symbol
RES
RXD/P3.0
TXD/P3.1
XTAL2
XTAL1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
VSS
P3.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
VDD
20L
SOP
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
dice
Pad#
4
5
6
7
8
9
10
11
12
13-15
17
18
19
20
21
22
23
24
1
2, 3
Signal Descriptions
Vss
Circuit ground potential.
VDD
+5V power supply during operation.
PORT 1
Port 1 is an 8-bit quasi-bidirectional I/O port.
There is a pull-up resistance when operating at either
input or output.
PORT 3
Port 3 is an 7-bit quasi-bidirectinal I/O port.
It also
contains the interrupt and timer as well as serial port
pins that are used by various options. The output latch
corresponding to a secondary function must be
programmed to one (1) for that function to operate.
The secondary functions are assigned to the pins of port
3, as follows:
- RXD/data (P3.0). Serial port's transmitter data input
(asynchronous) or data input/output (asynchronous).
- TXD/clock (P3.1). Serial port's transmitter data output
(asynchronous) or data input/output (asynchronous).
- #INT0 (P3.2). Interrupt 0 input or gate control input
for counter 0.
- #INT1 (P3.3). Interrupt 1 input or gate control input
for counter 1.
- T0 (P3.4). Input to counter 0.
- T1 (P3.5). Input to counter 1.
There is a pull-up resistance when operating at either
input or output.
RES
A low to high transition on this pin (V IH1) while the
oscillator is not running resets the MV20556. Holding
high signal (higher than V IH1) on this pin for two
machine cycles (24 clocks) or longer while the oscillator
is running, resets the device.
XTAL 1
Input to the oscillator's high gain amplifier. A crystal or
external source can be used.
XTAL 2
Output from the oscillator's amplifier. Required when a
crystal is used.


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