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1.3.3
Pin Functions
Table 1-3 outlines the pin functions of the H8S/2633 Series.
Table 1-3
Pin Functions
Type
Symbol
Power
VCC
PVCC1,
PVCC2
VSS
Clock
PLLVCC
PLLVSS
PLLCAP
XTAL
EXTAL
OSC1
OSC2
ø
14
I/O
Name and Function
Input
Power supply: For connection to the power supply.
All VCC pins should be connected to the system power
supply.
Input
Port power supply pin. Connect all pins to the same
power supply.
Input
Ground: For connection to ground
(0 V). All VSS pins should be connected to the system
power supply (0 V).
Input
PLL power supply: Power supply for on-chip PLL
oscillator.
Input
PLL ground: Ground for on-chip PLL oscillator.
Input
PLL capacitance: External capacitance pin for on-chip
PLL oscillator.
Input
Connects to a crystal oscillator.
See section 23, Clock Pulse Generator, for typical
connection diagrams for a crystal oscillator and
external clock input.
Input
Connects to a crystal oscillator.
The EXTAL pin can also input an external clock.
See section 23, Clock Pulse Generator, for typical
connection diagrams for a crystal oscillator and
external clock input.
Input
Subclock: Connects to a 32.768 kHz crystal oscillator.
See Chapter 23 Clock Oscillator for examples of
connections to a crystal oscillator.
Input
Subclock: Connects to a 32.768 kHz crystal oscillator.
See Chapter 23 Clock Oscillator for examples of
connections to a crystal oscillator.
Output
System clock: Supplies the system clock to an external
device.
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