H8SLASH3002 datasheet(84/700 Pages) RENESAS

Part #	H8/3002

Description	High-performance single-chip microcontroller

PDF	700 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

84 / 700 page

Figure 4-3 Reset Sequence (Modes 2 and 4)

4.2.3 Interrupts after Reset

If an interrupt is accepted after a reset but before the stack pointer (SP) is initialized, PC and CCR

will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests,

including NMI, are disabled immediately after a reset. The first instruction of the program is

always executed immediately after the reset state ends. This instruction should initialize the stack

pointer (example: MOV.L #xx:32, SP).

Address bus

RES

HWR

to D

Vector fetch

Internal

processing

Prefetch of first

program instruction

(1), (3)

(2), (4)

(5)

(6)

Note: After a reset, the wait-state controller inserts three wait states in every bus cycle.

High

LWR

Address of reset vector: (1) = H'00000, (3) = H'00002

Start address (contents of reset vector)

Start address

First instruction of program

(2)

(4)

(3)

(1)

(5)

(6)

H8/3002 Datasheet(PDF) 84 Page - Renesas Technology Corp