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1.3.2
Pin Functions
Table 1-2 outlines the pin functions of the H8/3937 Series and H8/3937R Series.
Table 1-2
Pin Functions
Type
Symbol
Power
V
CC
source pins
V
SS
AV
CC
AV
SS
Clock pins
OSC
1
OSC
2
DX
1
DX
2
RES
System
control
RESO
TEST
TESTD
TESTA9H
TEST20 to
TEST24
TEST43
Pin No.
TFP-100B
TFP-100G
I/O
12
Input
52
11
Input
51
99
Input
8
Input
10
Input
9
Output
85
Input
84
13
Input
28
Output
86
Input
83
34
65 to
Output
69
64
Name and Functions
Power supply: All V
CC
connected to the system power supply.
Ground: All V
pins should be connected
SS
to the system power supply (0 V).
Analog power supply: This is the power
supply pin for the A/D converter. When the
A/D converter is not used, connect this pin
to the system power supply.
Analog ground: This is the A/D converter
ground pin. It should be connected to the
system power supply (0V).
These pins connect to a crystal or
ceramic oscillator, or can be used to input
an external clock. See section 4, Clock
Pulse Generators, for a typical connection
diagram.
These pins connect to a 76.8-kHz or
160-kHz crystal oscillator. Output See
section 4, Clock Pulse Generators, for a
typical connection diagram.
Reset: When this pin is driven low, the chip
is reset
Reset output: Outputs the CPU internal
reset signal.
Test pins: These pins are reserved and
cannot be used. They should be connected
to V
.
SS
Test pins: These pins are reserved and
cannot be used. They should be left open.
pins should be
7
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