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(2) Pin Functions: Table 1-3 gives a concise description of the function of each pin.
Table 1-3. Pin Functions (1)
Type
Symbol
Power
V
CC
V
SS
Clock
XTAL
EXTAL
Ø
RES
System
control
STBY
Address
A
to A
15
0
bus
Pin No.
DC-64S
DP-64S FP-64A CP-68
14, 39
6, 31
15, 42
16, 48
8, 40
1, 17, 18,
35, 51, 52
17
9
19
18
10
20
7
63
8
12
4
13
15
7
16
40 to 47, 32 to 39, 43 to 50,
49 to 56 41 to 48 53 to 60
I/O Name and function
I
Power: Connected to the power supply
(+5V). Connect both V
system power supply (+5V).
I
Ground: Connected to ground (0V).
Connect all VSS pins to the system power
supply (0V).
I
Crystal: Connected to a crystal oscillator.
The crystal frequency should be double
the desired system clock frequency.
If an external clock is input at the EXTAL
pin, a reverse-phase clock should be input
at the XTAL pin.
I
External crystal: Connected to a crystal
oscillator or external clock. The frequency
of the external clock should be double the
desired system clock frequency. See
section 13.2, "Oscillator Circuit" for
examples of connections to a crystal and
external clock.
O
System clock: Supplies the system clock
to peripheral devices.
I
Reset: A Low input causes the chip to
reset.
I
Standby: A transition to the hardware
standby mode (a power-down state) occurs
when a Low input is received at the STBY
pin.
O
Address bus: Address output pins.
11
pins to the
CC
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