Pin Functions: Table 1.3 gives a concise description of the function of each pin.
Table 1.3 Pin Functions
Pin No.
FP-100B,
Type
Symbol
TFP-100B
I/O
Name and Function
Power
VCC
9, 59
I
Power: Connected to the power supply.
Connect both VCC pins to the system power
supply.
VCCB
4
I
I/O buffer power supply: Power supply for
input/output buffers at pins P86, P97, and
PA4 to PA7.
VSS
15, 70, 71,
92
I
I
Ground: Connected to ground (0 V).
Connect all VSS pins to system ground (0 V).
Clock
XTAL
2
Crystal: Connected to a crystal oscillator.
The crystal frequency should be the same
as 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.
EXTAL
3
I
External crystal: Connected to a crystal
oscillator or external clock. The frequency of
the external clock should be the same as
the desired system clock frequency. See
section 6.2, Oscillator Circuit, for examples
of connections to a crystal and external
clock.
ø
17
O
System clock: Supplies the system clock to
peripheral devices.
System control
RES
1
I
Reset: A low input causes the chip to reset.
RESO
100
O
Reset output: Outputs a reset signal to
external devices.
STBY
8
I
Standby: A transition to the hardware
standby mode (a power-down state) occurs
when a low input is received at the STBY
pin.
Address bus
Data bus
A15 to A0
D7 to D0
60 to 67,
72 to 79
O
Address bus: Address output pins.
89 to 82
I/O
Data bus: 8-bit bidirectional data bus.
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HITACHI [ HITACHI SEMICONDUCTOR ]
