IBM EM78P259N/260N 사용자 설명서

EM78P259N/260N

8-Bit Microprocessor with OTP ROM

Product Specification

(V1.2) 05.18.2007

• 49

(This specification is subject to change without further notice)

NOTE

In order to obtain accurate values, it is necessary to avoid any data transition on the
I/O pins during AD conversion.

6.7.6.2 Sample

Demo

Programs

A. Define a General Register

R_0 == 0

; Indirect addressing register

PSW == 3

; Status register

PORT5 == 5

PORT6 == 6

_E== 0XE

; Interrupt status register

B. Define a Control Register

IOC50 == 0X5

; Control Register of Port 5

IOC60 == 0X6

; Control Register of Port 6

C_INT== 0XF

; Interrupt Control Register

C. ADC Control Register

ADDATA == 0xB

; The contents are the results of ADC

AISR == 0x08

; ADC input select register

ADCON == 0x9

; 7 6 5 4 3 2 1 0

; VREFS CKR1 CKR0 ADRUN ADPD ADIS2 ADIS1 ADIS0

D. Define Bits in ADCON

ADRUN == 0x4

; ADC is executed as the bit is set

ADPD == 0x3

; Power Mode of ADC

E. Program Starts

ORG 0

; Initial address

JMP INITIAL

;

ORG 0x0C

; Interrupt vector

JMP CLRRE

;

;(User program section)

;

CLRRE:

MOV A,RE

AND A, @0BXX0XXXXX ; To clear the ADIF bit, “X” by application

MOV RE,A

BS ADCON, ADRUN

; To start to execute the next AD conversion

if necessary