Renesas SuperH M3A-HS86 Información técnica descargar pdf (Pagina 33)

Functional Overview

2.8 Reset Module

Rev.1.0 Feb 06. 2007 2-15

REJ10J0916-0100

2.8 Reset Module

Reset module controls the reset signal connected to the SH7086, which mounted on the M3A-HS86. Moreover,

when the flash memory is mounted, it is used as a reset signal of the flash memory.

Figure2.8.1 shows the block diagram of reset module in the M3A-HS86.

Vcc

Delay capacitance

Input Output

Reset IC

M51957BP

Open-collector output

SH7086

Vcc

0.1uF

Reset Switch

SW2

RES

RESET

Extension

Connector(J14)

Flash Memory

（not mounted）

Reset IC output delay time ,td = 0.34 × Cd(pF)usec = 34ms

Reset IC output detection voltage, Vs

・M3A-HS86(3.3V Version)

Ra=10KΩ、Rb=10KΩ

Vs = 1.25 × (Ra+Rb)/Rb = 2.50V

・M3A-HS60(5V Version)

Ra=20KΩ、Rb=10KΩ

Vs = 1.25 × (Ra+Rb)/Rb = 3.75V

H-UDI Connector(J1,J2)

RESET

Extension Connector(J10)

Figure2.8.1 Block Diagram of Reset Module

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 69 70

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Renesas SuperH M3A-HS86 Información técnica Pagina 33