Datasheet

Rev.6.00 Oct.28.2004 page 15 of 1016
REJ09B0138-0600H
1.3.3 Pin Functions
Table 1-3 outlines the pin functions of the H8S/2357 Group.
Table 1-3 Pin Functions
Pin No.
Type Symbol TFP-120 FP-128B I/O Name and Function
Power V
CC
81, 76,
52, 33,
1
89, 84,
58, 39,
5,
Input Power supply: For connection to the
power supply. All V
CC
pins should be
connected to the system power
supply.
V
SS
104, 79,
59, 47,
38, 24,
15, 6,
114, 100,
99, 87,
68, 67,
65, 53,
44, 36,
35, 28,
19, 10,
3
Input Ground: For connection to ground
(0 V). All V
SS
pins should be
connected to the system power
supply (0 V).
Internal voltage
step-down drop
pin
V
CL
*
1
72 80 INPUT Connects an external capacitor
between this pin and the ground pin
(0 V). This pin should never be
connected to V
CC
.
Clock XTAL 77 85 Input Connects to a crystal oscillator.
See section 20, Clock Pulse
Generator, for typical connection
diagrams for a crystal oscillator and
external clock input.
EXTAL 78 86 Input Connects to a crystal oscillator.
The EXTAL pin can also input an
external clock.
See section 20, Clock Pulse
Generator, for typical connection
diagrams for a crystal oscillator and
external clock input.
ø 80 88 Output System clock: Supplies the system
clock to an external device.