EM78P258N
8-Bit Microprocessor with OTP ROM
RETI
INITIAL:
MOV A,@0B00000001 ; To define P50 as an analog input
MOV AISR,A
MOV A,@0B00001000 ; To select P50 as an analog input channel, and
AD power on
MOV ADCON,A
En_ADC:
; To define P50 as an input pin and set clock
rate at fosc/16
MOV A, @0BXXXXXXX1 ; To define P50 as an input pin, and the others
IOW PORT5 ; are dependent on applications
MOV A, @0BXXXX1XXX ; Enable the ADWE wake-up function of ADC, “X”
by application
MOV RE,A
MOV A, @0BXXXX1XXX ; Enable the ADIE interrupt function of ADC,
“X” by application
IOW C_INT
ENI
; Enable the interrupt function
; Start to run the ADC
BS ADCON, ADRUN
; If the interrupt function is employed, the following three lines
may be ignored
;If Sleep:
SLEP
;
;(User program section)
;
or
;If Polling:
POLLING:
JBC ADCON, ADRUN
JMP POLLING
; To check the ADRUN bit continuously;
; ADRUN bit will be reset as the AD conversion
is completed
;
;(User program section)
;
48 •
Product Specification (V1.0) 06.16.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
