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參數(shù)資料
| 型號： | 6P8B |
| 廠商： | NEC Corp. |
| 英文描述： | MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION |
| 中文描述： | 馬鞍山集成電路4位單片機的紅外遙控傳輸 |
| 文件頁數(shù)： | 9/95頁 |
| 文件大?。?/td> | 692K |
| 代理商： | 6P8B |
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9
μ
PD6P8, 6P8A, 6P8B
Data Sheet U17848EJ3V0DS
(2)
μ
PD6P8B
Pin No.
Symbol
Function
Output Format
After Reset
1
2
15 to 20
K
I/O0
to K
I/O7
CMOS
Push-pull
Note 1
High-level output
3
S
0
—
High-impedance
(OFF mode)
4
S
1
/LED
CMOS push-pull
High-level output
(LED)
5
REM
CMOS push-pull
Low-level output
6
V
DD
—
—
—
—
7
IC
9
GND
—
—
8
10
S
3
S
2
—
Input
(high impedance,
STOP mode
release cannot be
used)
11 to 14
K
I0
to
K
I3
Note 2
—
Input (low-level)
Notes 1.
Note that the drive capability of the low-level output side is held low.
2.
In order to prevent malfunction, do not input a high-level signal to pins K
I0
to K
I3
(leaving these pins
open is possible, however, when these pins are left open, do not disconnect any connected pull-down
resistors) when POC is released due to supply voltage startup.
8-bit I/O port. I/O mode can be switched in 8-bit units.
In input mode, a pull-down resistor is added.
In output mode, these pins can be used as a key scan
outputs from the key matrix.
Input port.
This pin can also be used as a key return input from the
key matrix.
In input mode, the use of a pull-down resistor for the S
0
and S
1
ports can be specified by software in 2-bit units.
If input mode is released by software, this pin is placed
in the OFF mode and enters a high-impedance state.
I/O port.
In input mode (S
1
), this pin can also be used as a key
return input from the key matrix.
The use of a pull-down resistor for the S
0
and S
1
ports
can be specified by software in 2-bit units.
In output mode (LED), this pin becomes the remote
control transmission display output (active low). When
the remote control carrier is output from the REM output,
this pin outputs a low level from the LED output in
synchronization with the REM signal.
Infrared remote control transmission output.
The output is active high.
The carrier high-level and low-level width can each be
freely set in a range of 250 ns to 64
μ
s (@ f
X
= 4 MHz)
using software.
Power supply
Internally connected pin
GND pin
Input port.
The use of the STOP mode release of the S
2
and S
3
ports
can be specified by software.
When using these pins as a key input from the key
matrix, enable the use of the STOP mode release (at this
time, a pull-down resistor is connected internally.)
When the STOP mode release is disabled, these pins
can be used as an input port that does not release the
STOP mode even if the release condition is established
(at this time, a pull-down resistor is not connected internally.)
4-bit input port.
These pins can be used as key return inputs to the key
matrix. The use of pull-down resistors can be specified
by software in 4-bit units.
<R>
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