參數(shù)資料
型號: HD404448
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數(shù): 4/123頁
文件大小: 726K
代理商: HD404448
HD404449 Series
4
Pin Description
Item
Symbol
Pin Number I/O
Function
Power supply
V
CC
GND
TEST
77
Applies power voltage
10
Connected to ground
Test
4
I
Used for factory testing only: Connect this pin to V
CC
Resets the MCU
Reset
RESET
7
I
Oscillator
OSC
1
5
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
6
O
8
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
9
O
Port
D
0
–D
11
11–22
I/O
Input/output pins addressed by individual bits; pins
D
–D
9
are high-current pins that can each supply up to
15 mA
D
12
, D
13
R0
0
–RC
3
INT
0
,
INT
1
,
INT
2
, INT
3
STOPC
SCK
1
,
SCK
2
SI
1
, SI
2
SO
1
, SO
2
TOB, TOC, TOD 37–39
EVNB
, EVND
23, 24
I
Input pins addressable by individual bits
25–76
I/O
Input/output pins addressable in 4-bit units
Interrupt
24–27
I
Input pins for external interrupts
Stop clear
23
I
Input pin for transition from stop mode to active mode
Serial
42, 46
I/O
Serial clock input/output pin
interface
43, 47
I
Serial receive data input pin
44, 48
O
Serial transmit data output pin
Timer
O
Timer output pins
40, 41
I
Event count input pins
A/D converter
AV
CC
78
Power pin for A/D converter: Connect it to the same
potential as V
CC
, as physically close to the V
CC
pin as
possible
AV
SS
3
Ground for AV
: Connect it to the same potential as
GND, as physically close to the GND pin as possible
AN
0
–AN
3
79, 80, 1, 2
I
Analog input pins for A/D converter
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