HD64F2149YV datasheet(50/1075 Pages) RENESAS

50 / 1075 page

Section 1 Overview

Rev. 3.00 Jan 18, 2006 page 22 of 1044

REJ09B0280-0300

1.3.3

Pin Functions

Table 1.3 summarizes the functions of the H8S/2149 and H8S/2169 pins.

Table 1.3

Pin Functions

Pin No.

Type

Symbol

FP-100B,

TFP-100B TFP-144 I/O

Name and Function

Power

VCC

1, 86

Input

Power: For connection to the power

supply. Connect the VCC pin to the system

power supply.

VCL

Input

Power supply stabilization capacitance:

Connect the VCL pin to the system power

supply together with the VCC pin.

VCCB

Input

Input/output buffer power: The power

supply for the port A, E, F, and G

input/output buffer.

VSS

15, 70, 71,

7, 42, 95,

111, 139

Input

Ground: For connection to the power

supply (0 V). Connect all VSS pins to the

system power supply (0 V).

Clock

XTAL

143

Input

Connected to a crystal oscillator. See

section 23, Clock Pulse Generator, for

typical connection diagrams for a crystal

oscillator and external clock input.

EXTAL

144

Input

Connected to a crystal oscillator. The

EXTAL pin can also input an external

clock. See section 23, Clock Pulse

Generator, for typical connection diagrams

for a crystal oscillator and external clock

input.

Output

System clock: Supplies the system clock

to external devices.

EXCL

Input

External subclock input: Input a 32.768

kHz external subclock.

—

140

Input

Leave open.

—

141

Input

Leave open.

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