User`s manual

Functional Overview

2.8 Reset Module

Rev.1.01

Jan 31, 2008

2-16

REJ10J1262-0101

2.8 Reset Module

This circuit controls the reset signal of SH7211 mounted on the M3A-HS11.

Figure 2.8.1 shows the block diagram of reset module in the M3A-HS11.

3Vcc

Delay Capacitance

Input Output

M51957BP

SH7211

3Vcc

0.1uF

Reset Switch

(SW2)

RES

RESET

Extension Connector

Reset IC Output Delay Time : td = 0.34 × Cd(pF) = 34ms

Reset IC Output Detection Voltage : Ra=10KΩ,Rb=10KΩ

Vs = 1.25 × (Ra+Rb)/Rb = 2.5V

R1LV1616RSA-7S

CS2

Figure 2.8.1 Block Diagram of Reset Module

2.9 Interrupt Switches

In the M3A-HS11, the push switches are connected with the IRQ3 (PA21) pin and NMI pin of the SH7211. Moreover,

TP switch is connected with the test port (H12) so that it can be used by connecting with a desired pin. Figure 2.9.1

shows the block diagram of interrupt switch in the M3A-HS11.

Figure 2.9.1 Block Diagram of Interrupt Switch

PA21/IRQ3

NMI

SW5

SH7211

3VCC

SW6

3VCC

NMI Switch

ＩＲＱ3 Switch

SW7

3VCC

TP Switch

H12