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