參數(shù)資料
型號: HD40A4639R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計算機)
中文描述: 4位單片機(4位單片微計算機)
文件頁數(shù): 4/133頁
文件大?。?/td> 803K
代理商: HD40A4639R
HD404639R Series
4
Pin Description
Item
Symbol
Pin Number I/O
Function
Power
supply
V
CC
GND
TEST
79
Applies power voltage
12
Connected to ground
Test
6
I
Used for factory testing only: Connect this pin to V
CC
Resets the MCU
Reset
RESET
9
I
Oscillator
OSC
1
7
I
Input/output pins for the internal oscillator circuit:
Connect them to a ceramic oscillator, crystal, or connect
OSC
1
to an external oscillator circuit
OSC
2
X1
8
O
10
I
Used for a 32.768-kHz crystal for clock purposes. If not to
be used, fix the X1 pin to V
CC
and leave the X2 pin open.
X2
11
O
Port
D
0
–D
11
13–24
I/O
Input/output pins addressed by individual bits; pins D
D
are high-current sink pins that can each supply up to
15 mA, D
–D
are high-current source pins that can each
supply up to 10 mA
D
12
, D
13
R0
0
–RC
0
RD
0
–RD
3
,RE
0
INT
0
,
INT
1
,
INT
2
–INT
4
STOPC
SCK
1
,
SCK
2
SI
1
, SI
2
SO
1
, SO
2
TOB, TOC, TOD 39–41
EVNB
, EVND
25, 26
I
Input pins addressable by individual bits
27–75
I/O
Input/output pins addressable in 4-bit units
1–5
I
Input pins addressable in 4-bit units
Interrupt
26–30
I
Input pins for external interrupts
Stop clear
25
I
Input pin for transition from stop mode to active mode
Serial
interface
44, 48
I/O
Serial interface clock input/output pin
45, 49
I
Serial interface receive data input pin
46, 50
O
Serial interface transmit data output pin
Timer
O
Timer output pins
42, 43
I
Event count input pins
DTMF
TONER
78
O
Output pin for DTMF row signals
TONEC
77
O
Output pin for DTMF column signals.
VT
ref
80
Reference voltage pin for DTMF signals.
Voltage conditions being V
CC
VT
ref
GND
Analog input pins for voltage comparator
Voltage
comparator
COMP
0
–COMP
3
1–4
I
VC
ref
5
Reference voltage pin for inputting the threshold voltage
of the analog input pin.
Division
rate
SEL
76
I
Input pin for selecting system clock division rate after
RESET input or after stop mode cancellation.
1/4 division rate: Connect it to V
CC
1/32 division rate:
Connect it to GND
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