HD404318 Datasheet, PDF (4/66 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
PinDescription
Pin Number
Item
Symbol
DP-42S FP-44A I/O Function
Power supply V_CC
GND
21
16
10
5
Applies power voltage
Connected to ground
Test
V_disp (shared 1
with RA₁)
TEST
6
39
Used as a high-voltage output power supply pin when
selected by the mask option
1
I Cannot be used in user applications. Connect this pin
to GND.
Reset
RESET
7
2
I Resets the MCU
Oscillator OSC₁
8
3
I Input/output pin for the internal oscillator. Connect these
pins to the ceramic or crystal oscillator, or OSC₁ to an
external oscillator circuit.
OSC₂
9
4
O
Port
D₀–D₈
22–30 17–21, I/O Input/output pins addressed individually by bits; D₀–D₈
23–26
are all high-voltage I/O pins. Each pin can be
individually configured as selected by the mask option.
Interrupt
Stop clear
RA₁
R0₀–R0₃,
R3₀–R4₃
R1₀–R2₃,
R8₀–R8₃
INT₀, INT₁
STOPC
1
39
I One-bit high-voltage input port pin
2–5, 40–43, I/O Four-bit input/output pins consisting of standard voltage
12–19 7–14
pins
31–42 27–38 I/O Four-bit input/output pins consisting of high voltage pins
22, 23 17, 18 I
26
21
I
Input pins for external interrupts
Input pin for transition from stop mode to active mode
Serial
interface
SCK
2
40
I/O Serial interface clock input/output pin
SI
3
41
I Serial interface receive data input pin
SO
4
42
O Serial interface transmit data output pin
Timer
TOC
5
43
O Timer output pin
EVNB
24
19
I Event count input pin
Alarm
BUZZ
25
20
O Square waveform output pin
A/D
converter
AV_CC
20
15
AV_SS
11
6
Power supply for the A/D converter. Connect this pin as
close as possible to the V_CC pin and at the same voltage
as V_CC. If the power supply voltage to be used for the
A/D converter is not equal to V_CC, connect a 0.1-µF
bypass capacitor between the AV_CC and AV_SS pins.
(However, this is not necessary when the AV_CC pin is
directly connected to the V_CC pin.)
Ground for the A/D converter. Connect this pin as close
as possible to GND at the same voltage as GND.
AN₀–AN₇ 12–19 7–14 I Analog input pins for the A/D converter
4