Hitachi H8S/2670, Reference Manual

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20
1.5 Pin Functions
Table 1.3 Pin Functions
Pin No.
Type Symbol FP-144 I/O Name and Function
Power VCC 5, 39, 67,
96, 116 Input Power: For connection to the power
supply. All V
CC
pins should be connected
to the system power supply.
VSS 12, 19, 26,
47, 76, 99,
136 Input Ground: For connection to the power
supply. All V
SS
pins should be connected
to the system power supply (0 V).
PLLVCC 94 Input PLL power: The on-chip PLL oscillator
power supply.
PLLVSS 92 Input PLL ground: The on-chip PLL oscillator
ground.
Clock XTAL 98 Input For connection to a crystal oscillator.
See section 19, Clock Pulse Generator,
in the H8S/2678 Series Hardware
Manual for typical connection diagrams
for a crystal oscillator and external clock
input.
EXTAL 97 Input For connection to a crystal oscillator.
The EXTAL pin can also input an
external clock. See section 19, Clock
Pulse Generator, in the H8S/2678
Series Hardware Manual for typical
connection diagrams for a crystal
oscillator and external clock input.
ø 95 Output System clock: Supplies the system
clock to external devices.