EM78P417N/418N/419N
8-Bit Microprocessor with OTP ROM
3. Set the ADWE bit, if the wake-up function is employed
4. Set the ADIE bit, if the interrupt function is employed
5. Write “ENI” instruction, if the interrupt function is employed
6. Set the ADRUN bit to 1
7. Write “SLEP” instruction or Polling.
8. Wait for wake-up or for ADRUN bit to be cleared (“0” value)
9. Read the ADDATA or ADDATA1H and ADDATA1L conversion data registers. If
ADC input channel changes at this time, the ADDATA, ADDATA1H, and
ADDATA1L values can be cleared to ‘0’.
10. Clear the interrupt flag bit (ADIF).
11. For next conversion, go to Step 1 or Step 2 as required. At least 2 Tct is required
before the next acquisition starts.
NOTE
In order to obtain accurate values, it is necessary to avoid any data transition on I/O
pins during AD conversion
6.7.6.2 Sample Demo Programs
A. Define a General Registers
R_0 == 0
PSW == 3
PORT5 == 5
PORT6 == 6
RE== 0XE
RF== 0XF
; Indirect addressing register
; Status register
; Wake-up control resister
; Interrupt status register
B. Define a Control Register
IOC50 == 0X5
IOC60 == 0X6
C_INT== 0XF
; Control Register of Port 5
; Control Register of Port 6
; Interrupt Control Register
C. ADC Control Register
ADDATA == 0xB
AISR == 0x08
ADCON == 0x9
; The contents are the results of ADC
; ADC Input select register
;
7
6
5
4
3
2
1
0
;VREFS CKR1 CKR0 ADRUN ADPD ADIS2 ADIS1 ADIS0
D. Define Bits in ADCON
ADRUN == 0x4
ADPD == 0x3
; ADC is executed as the bit is set
; Power Mode of ADC
48 •
Product Specification (V1.0) 06.23.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
