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參數(shù)資料
| 型號(hào)： | HD40L4812 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| 中文描述： | 4位單片機(jī)（4位單片微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 7/98頁(yè) |
| 文件大小： | 621K |
| 代理商： | HD40L4812 |
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HD404818 Series
7
Pin Functions
Power Supply
V
CC
:
Apply the V
CC
power supply voltage to this pin.
GND:
Connect to ground.
TEST
:
For test purposes only. Connect it to V
CC
.
RESET:
MCU reset pin. Refer to the Reset section for details.
NUMG:
Non-user pin. Connect it to GND.
NUMO:
Non-user pin. Do not connect it to any lines.
Oscillators
OSC
1
, OSC
2
:
Internal oscillator input pins. They both can be connected to a crystal, ceramic resonator, or
external oscillator circuit. Refer to the Internal Oscillator Circuit section for details.
X1, X2:
Watch oscillator 32-kHz crystal pins.
Ports
D
0
–D
13
(D Port):
Fourteen 1-bit I/O ports. D
0
to D
9
are I/O ports and D
10
to D
13
are input ports. D
0
–D
9
are
high current output ports (15 mA max.). D
11
–D
13
are also available as voltage comparators. Refer to the
Input/Output section for details.
R0–R3 (R Ports):
4-bit I/O ports. R0
0
, R0
1
, R0
2
, R3
1
, R3
2
, and R3
3
are multiplexed with
SCK
, SI, SO,
TIMO,
INT
0
, and
INT
1
, respectively.
Interrupts
INT
0
,
INT
1
:
External interrupt pins.
INT
1
can be used as an external event input pin for timer B.
INT
0
and
INT
1
are multiplexed with R3
2
and R3
3
, respectively. For details, see the Interrupts section.
Serial Interface
SCK
, SI, SO:
The transmit clock I/O pin (
SCK
), serial data input pin (SI), and serial data output pin (SO)
are used for serial interface.
SCK
, SI, and SO are multiplexed with R0
0
, R0
1
, and R0
2
, respectively. For
details, see the Serial Interface section.
Timer
TIMO:
Variable duty-cycle pulse waveform output pin. See the Timer C section for details.
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