Pin Functions - Hitachi H8/3022 Hardware Manual

1.4 Pin Functions

Table 1-3 summarizes the pin functions.
Table 1-3 Pin Functions
Type Symbol
Power V
CC
V
SS
Clock XTAL
EXTAL
ø
Operating MD
mode MD
control MD
Pin No.
21,
53
12,
30,
50
52
51
46
, 7,
2
, 45,
1
44
0
I/O Name and Function
Input Power: For connection to the power
supply. Connect all V
power supply.
Input Ground: For connection to ground (0 V).
Connect all V
power supply.
Input For connection to a crystal resonator
For examples of crystal resonator and
external clock input, see section 16, Clock
Pulse Generator.
Input For connection to a crystal resonator or
input of an external clock signal. For
examples of crystal resonator and external
clock input, see section 16, Clock Pulse
Generator.
Output System clock: Supplies the system clock
to external devices
Input Mode 2 to mode 0: For setting the
operating mode, as follows. These pins
should not be changed during operation.
MD
2
0
0
0
0
1
1
1
1
pins to the system
CC
pins to the 0-V system
SS
Operating
MD MD Mode
1 0
0 0 —
0 1 Mode 1
1 0 —
1 1 Mode 3
0 0 —
0 1 Mode 5
1 0 Mode 6
1 1 Mode 7
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