HD64F2168 Datasheet, PDF (49/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

1.3.3 Pin Functions
Table 1.2 Pin Functions
Type
Power
supply
Clock
Operating
mode
control
System
control
Address
bus
Data bus
Symbol
VCC
Pin No.
1, 36
86
I/O
Input
VCL
13
Input
VSS
XTAL
EXTAL
7, 42,
95, 111
139
143
144
Input
Input
Input
φ
18
EXCL
18
PFSEL 141
Output
Input
Input
MD2
14
MD1
9
MD0
10
RES
8
RESO
142
STBY
12
Input
Input
Output
Input
FWE
135
Input
A23 to A16 33 to 35
37 to 41
Output
A15 to A0 96 to 110
112
D15 to D8 128 to 121 Input/
Output
D7 to D0 85 to 78
Name and Function
Power supply pins. Connect all these pins to the
system power supply. Connect the bypass
capacitor between VCC and VSS (near VCC).
External capacitance pin for internal step-down
power. Connect this pin to Vss through an
external capacitor (that is located near this pin) to
stabilize internal step-down power.
Ground pins. Connect all these pins to the system
power supply (0V).
For connection to a crystal resonator. An external
clock can be supplied from the EXTAL pin. For an
example of crystal resonator connection, see
section 22, Clock Pulse Generator.
Supplies the system clock to external devices.
32.768-kHz external clock for sub clock should be
supplied.
Pin for use by PLL. For an example of PLL
connection, see section 22, Clock Pulse
Generator.
These pins set the operating mode. Inputs at
these pins should not be changed during
operation.
Reset pin. When this pin is low, the chip is reset.
Outputs a reset signal to an external device.
When this pin is low, a transition is made to
hardware standby mode.
Pin for use by flash memory.
Address output pins
Upper bidirectional data bus
Lower bidirectional data bus
Rev. 3.00, 03/04, page 9 of 830