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Table 1-3 (c) Pin Functions (H8S/2695)
Type
Symbol
Power
VCL
PVCC
VSS
Clock
PLLVSS
PLLCAP
XTAL
EXTAL
ø
Operating mode
MD2 to MD0
control
I/O
Name and Function
Output
On-chip power supply stabilizer pin: The VCL pin need
not be connected to the power supply. Connect this pin
to VSS via a 0.1 µF capacitor (placed close to the
pins).
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 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 23B, Clock Pulse Generator (H8S/2633R,
H8S/2695), 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 23B, Clock Pulse Generator (H8S/2633R,
H8S/2695), for typical connection diagrams for a
crystal oscillator and external clock input.
Output
System clock: Supplies the system clock to an external
device.
Input
Mode pins: These pins set the operating mode.
The relation between the settings of pins MD2 to MD0
and the operating mode is shown below. These pins
should not be changed while the H8S/2633 Series is
operating.
MD2
MD1
0
0
1
1
0
1
MD0
Operating Mode
0
—
1
—
0
—
1
—
0
Mode 4
1
Mode 5
0
Mode 6
1
Mode 7
43
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