M3885 datasheet(56/103 Pages) RENESAS

56 / 103 page

3885 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Fig. 50 Reset timing and block

LRESET

LPC interface reset signal

CPU Data bus bit 2

LPCSR write signal

CPU RESET

LPCSR bit

(LPC interface software reset signal)

LPCSR write signal

1.5 cycle of

CPU RESET

Table 17 Reset conditions of LPC interface function

Pin name / Internal register

P80/LAD0

P81/LAD1

P82/LAD2

P83/LAD3

P84/LFRAME

P85/LRESET

P86/LCLK

Input data bus buffer registeri

Output data bus buffer registeri

Uxi flag 7, 6, 5, 4, 2

XA2i flag

IBFi flag

OBFi flag

LPCi address register

LPCCON

LRESET = “L”

Tri-state

Input

LPC bus interface function

Input

Keep same value before

LRESET goes “L”.

Initialization to “0”.

Keep same value before

LRESET goes “L”.

Note

There is possibility to generate

IBF interrupt request.

There is possibility to generate

OBE interrupt request.

M3885 Datasheet(PDF) 56 Page - Renesas Technology Corp

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