Datasheet

Section 1 Overview
Rev. 4.00 Sep 27, 2006 page 26 of 1130
REJ09B0327-0400
1.3.3 Pin Functions
Table 1.3 summarizes the pin functions of this LSI.
Table 1.3 Pin Functions
Pin No.
Type Symbol
FP-100B
TFP-100B I/O Name and Function
Power
supply
VCC1
VCC2
4 [H8S/2144
Group only],
59
9
*
Input Power supply: For connection to the power supply.
All VCC1 and VCC2
*
pins should be connected to
the system power supply.
VCL 9
*
Input Internal step-down voltage pin: A power supply
pin for the product, applicable to product lines that
have an internal step-down voltage. In the 5-V and
4-V versions, connect external capacitors to
stabilize the internal step-down voltage between
this pin and the VSS pin. Do not connect it to Vcc.
In the 3-V version, connect this pin and the VCC1
pin to the power supply for the system. For details,
See section 26, Electrical Characteristics.
VCCB 4 [H8S/2148
Group and
H8S/2147N
only]
Input Input/output buffer power supply: Power supply
pin for the port A input/output buffer.
VSS 15, 70
71, 92
Input Ground: All VSS pins should be connected to the
system power supply (0 V).
Clock XTAL 2 Input Connected to a crystal oscillator. See section 24,
Clock Pulse Generator, for typical connection
diagrams for a crystal oscillator and external clock
input.
EXTAL 3 Input Connected to a crystal oscillator. The EXTAL pin
can also input an external clock. See section 24,
Clock Pulse Generator, for typical connection
diagrams for a crystal oscillator and external clock
input.
φ 17 Output System clock: Supplies the system clock to
external devices.
EXCL 17 Input External subclock input: Input a 32.768 kHz
external subclock.