HD404849 Datasheet, PDF (4/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
Pin Description
Item
Power supply
Test
Reset
Oscillator
Port
Interrupt
Stop clear
Serial
Timer
Pin Number
Symbol
FP-80A ,TFP-80C FP-80B
I/O Function
V_CC
73
75
Applies power voltage
GND
10
12
Connected to ground
TEST
4
6
I Used for factory testing only: Connect
this pin to GND
RESET
7
9
I Resets the MCU
OSC₁
5
7
I Input/output pins for the internal
oscillator circuit:
Connect them to a ceramic oscillator
or connect OSC1 to an external
oscillator circuit.
OSC₂
6
X1
8
8
O
10
I Used for a 32.768-kHz crystal for
clock purposes. If not to be used, fix
the X1 pin to VCC and leave the X2
pin open.
X2
9
11
O
D₀–D₈
11–19
13–21
I/O Input/output pins addressed by
individual bits; pins D₀–D₈ are high-
current pins that can each supply up
to 15 mA
D₁₀, D₁₁
20, 21
22, 23
I Input pins addressable by individual
bits
R0–R3, R6, 22–33, 79, 80,
R7
1, 2, 34–41
24–35, 1–4, I/O Input/output pins addressable in 4-bit
36–43
units
INT₀, INT₁,
INT₂, INT₃
STOPC
21–24
20
23–26
22
I Input pins for external interrupts
I Input pin for transition from stop mode
to active mode
SCK
31
33
I/O Serial clock input/output pin
SI
32
34
I Serial receive data input pin
SO
33
35
O Serial transmit data output pin
TOB, TOC, 26–28
TOD
28–30
O Timer output pins
EVNB,
EVND
29, 30
31, 32
I Event count input pins
4