Mitsubishi DS5000TK, DS907x SIP manual Interrupts, Timed ± DS5000 only

USER'S GUIDE

A code example that initializes the memory map is as follows. It assumes that the DS5000FP user requires a

Partition of 5800h. A DS5001FP using the same code would use a Partition of B000h.

MCON	EQU	0C6h
Org	00h
SJMP	Start
Org	30h
Start :
MOV	TA,	#0AAh	;Timed
MOV	TA,	#55h	; Access
ORL	MCON,	#02h	;Set PAA ± DS5000 ONLY
MOV	MCON,	#0B8h	;Set Partition to 5800 on DS5000, B000h on DS5001
MOV	TA,	#0AAh	;Timed ± DS5000 ONLY
MOV	TA,	#55h	; Access ± DS5000 ONLY
ANL	MCON,	#0FDh	;Clear PAA ± DS5000 ONLY

Another common memory requirement is the initializa- tion of the Data Pointer. When using NV RAM to store data, this pointer must be moved to the Partition address (in a partitionable configuration). Thus if the Partition is set to 5800h, the DPTR should be set to 5800h to start. Once data has been saved in NV RAM, the DPTR should be saved in a known, nonvolatile loca- tion so that is can be restored on a reset.

The global interrupt enable must also be activated. Any interrupt needing a higher priority must be selected as such. The following code example shows the enabling of individual interrupts. A user would combine the appropriate bits as needed by the application. In this application example, the serial port is given a high prior- ity interrupt.

Interrupts

After a reset, all interrupts are disabled. Therefore the user must enable individual interrupts that are needed.

ORG	00h
SJMP	Start
Org	30h
Start :
ORL	PCON, #08h	;Enable Power±fail Warning by setting EPFW
SETB	PS	;Set Serial Port Interrupt to High Priority
SETB	ES	;Enable Serial Port Interrupt
SETB	ET1	;Enable Timer 1 Interrupt
SETB	EX1	;Enable External Interrupt 1
SETB	ET0	;Enable Timer 0 Interrupt
SETB	EX0	;Enable External Interrupt 0
SETB	EA	; Globally enable interrupts

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