H8SSLASH2214 datasheet(72/936 Pages) RENESAS

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Section 1 Overview

Rev.4.00 Sep. 18, 2008 Page 12 of 872

REJ09B0189-0400

1.3.3

Pin Functions

Table 1.3 outlines the pin functions of the H8S/2214.

Table 1.3

Pin Functions

Type

Symbol

I/O

Name and Function

Power

VCC

Input

Power supply: For connection to the power supply. All V

pins should be connected to the system power supply.

VSS

Input

Ground: For connection to ground (0 V). All V

SS pins should

be connected to the system power supply (0 V).

Clock

XTAL

Input

Crystal: Connects to a crystal oscillator. See section 16,

Clock Pulse Generator, for typical connection diagrams for

a crystal oscillator and external clock input.

EXTAL

Input

External clock: Connects to a crystal oscillator. The EXTAL

pin can also input an external clock. See section 16, Clock

Pulse Generator, for typical connection diagrams for a

crystal oscillator and external clock input.

Output System clock: Supplies the system clock to an external

device.

Operating

mode control

MD2 to

MD0

Input

Mode pins: These pins set the operating mode. The relation

between the settings of pins MD2 to MD0 and the operating

mode is shown below. These pins should not be changed

while the H8S/2214 is operating. Except when the mode is

changed, the mode pins (MD2 to MD0) must be pulled

down or pulled up to a fixed level until powering off.

MD2

MD1

MD0

Operating Mode

—

Mode 4

Mode 5

Mode 6

Mode 7

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