HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 38

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Pin Functions: Table 1-4 gives a concise description of the function of each pin.
Table 1-4 Pin Functions
Type
Power
Clock
System
control
Symbol
V
V
XTAL
EXTAL
ø
E
BACK
CC
SS
CP-84, FP-80A,
CG-84 TFP-80C
16, 55
2, 24
41, 42
64, 83
1
84
3
4
5
Pin No.
5, 42
12, 29
71
70
69
72
73
74
I/O
I
I
I
I
O
O
O
Power: Connected to the power supply (+5 V).
Connect both V
supply (+5 V). The chip will not operate if either
pin is left unconnected.
Ground: Connected to ground (0 V).
Connect all V
supply (0 V). The chip will not operate if any V
pin is left unconnected.
Crystal: Connected to a crystal oscillator.
The crystal frequency should be double the desired
ø clock frequency.
If an external clock is input at the EXTAL pin, leave
the XTAL pin unconnected.
External Crystal: Connected to a crystal
oscillator or external clock. The frequency of the
external clock should be double the desired ø clock
frequency. See section 8.2, “Oscillator Circuit” for
examples of connections to a crystal and external
clock.
System Clock: Supplies the ø clock to peripheral
devices.
Enable Clock: Supplies an E clock to E clock
based peripheral devices.
Bus Request Acknowledge: Indicates
that the bus right has been granted to an external
device. Notifies an external device that issued a
BREQ signal that it now has control of the bus.
Name and Function
17
SS
CC
pins to the system power
pins to the system power
SS