HD404449 Datasheet, PDF (4/123 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Pin Description
Item
Symbol
Pin Number I/O Function
Power supply V_CC
77
GND
10
Applies power voltage
Connected to ground
Test
Reset
TEST
4
RESET
7
I Used for factory testing only: Connect this pin to V_CC
I Resets the MCU
Oscillator
OSC₁
5
OSC₂
6
X1
8
I Input/output pins for the internal oscillator circuit:
Connect them to a ceramic oscillator, crystal, or
connect OSC₁ to an external oscillator circuit
O
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
D₀–D ₁₁
11–22
I/O Input/output pins addressed by individual bits; pins
D₀–D₉ are high-current pins that can each supply up to
15 mA
Interrupt
Stop clear
D₁₂, D₁₃
R0₀–RC₃
INT₀, INT₁,
INT₂, INT₃
STOPC
23, 24
25–76
24–27
23
I Input pins addressable by individual bits
I/O Input/output pins addressable in 4-bit units
I Input pins for external interrupts
I Input pin for transition from stop mode to active mode
Serial
interface
Timer
SCK₁, SCK₂
42, 46
SI₁, SI₂
43, 47
SO₁, SO₂
44, 48
TOB, TOC, TOD 37–39
I/O Serial clock input/output pin
I Serial receive data input pin
O Serial transmit data output pin
O Timer output pins
EVNB, EVND 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_CC: Connect it to the same potential as
GND, as physically close to the GND pin as possible
AN₀–AN₃
79, 80, 1, 2 I Analog input pins for A/D converter
4