H8SLASH300H datasheet(67/552 Pages) RENESAS

67 / 552 page

Section 2 CPU

Rev. 3.00 May 15, 2007 Page 35 of 516

REJ09B0152-0300

Reset state

Program halt state

Exception-handling state

Program execution state

Reset cleared

SLEEP instruction executed

Reset

occurs

Interrupt

source

Reset

occurs

Interrupt

source

Exception-

handling

complete

Reset occurs

Figure 2.12 State Transitions

2.8

Usage Notes

2.8.1

Notes on Data Access to Empty Areas

The address space of this LSI includes empty areas in addition to the ROM, RAM, and on-chip

I/O registers areas available to the user. When data is transferred from CPU to empty areas, the

transferred data will be lost. This action may also cause the CPU to malfunction. When data is

transferred from an empty area to CPU, the contents of the data cannot be guaranteed.

2.8.2

EEPMOV Instruction

EEPMOV is a block-transfer instruction and transfers the byte size of data indicated by R4 or

R4L, which starts from the address indicated by R5, to the address indicated by R6. Set R4, R4L,

and R6 so that the end address of the destination address (value of R6

+ R4L or R6 + R4) does not

exceed H'FFFF (the value of R6 must not change from H'FFFF to H'0000 during execution).

H8/300H Datasheet(PDF) 67 Page - Renesas Technology Corp