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Rev. 2.0, 09/02, page 7 of 732
1.4
Pin Functions
Type
Symbol
I/O
Name
Function
V
CC
Input
Power supply
Power supply pins. Connect all these pins
to the system power supply. The chip does
not operate when some of these pins are
opened.
Power
Supply
V
SS
Input
Ground
Ground pins. Connect all these pins to the
system power supply (0 V). The chip does
not operate when some of these pins are
opened.
PLLV
CC
Input
Power supply
for PLL
Power supply pin for supplying power to
on-chip PLL.
PLLV
SS
Input
Ground for
PLL
On-chip PLL oscillator ground pin.
PLLCAP
Input
Capacitance
for PLL
External capacitance pin for an on-chip
PLL oscillator.
EXTAL
Input
External clock
For connection to a crystal resonator. (An
external clock can be supplied from the
EXTAL pin.) For examples of crystal
resonator connection and external clock
input, see section 4, Clock Pulse
Generator.
XTAL
Input
Crystal
For connection to a crystal resonator. For
examples of crystal resonator connection
and external clock input, see section 4,
Clock Pulse Generator.
Clock
CK
Output
System clock
output
Supplies the system clock to external
devices.
MD3
MD2
MD1
MD0
Input
Set the mode
Set the operating mode. Inputs at these
pins should not be changed during
operation.
Operating
mode control
FWP
Input
Protection
against write
operation into
Flash memory
Pin for the flash memory. This pin is only
used in the F-ZTAT version. Programming
or erasing of flash memory can be
protected. This pin is used as Vcc in the
mask ROM version.