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EM78P458AP bảng dữ liệu(PDF) 35 Page - ELAN Microelectronics Corp

tên linh kiện EM78P458AP
Giải thích chi tiết về linh kiện  8-BIT MICRO-CONTROLLER
PDF  76 Pages
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nhà sản xuất  EMC [ELAN Microelectronics Corp]
Trang chủ  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P458AP bảng dữ liệu(HTML) 35 Page - ELAN Microelectronics Corp

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EM78P458/459
OTP ROM
(a) Select A/D input channel ( ADAS2:ADAS0 );
(b) Select the proper gains by writing to the GCON register ( optional );
(c) Define A/D conversion clock rate ( CKR1:CKR0 );
(d) Set the ADPD bit to 1 to begin sampling.
(3) Put “ENI” instruction, if the interrupt function is employed.
(4) Set the ADRUN bit to 1.
(5) Wait for either the interrupt flag to be set or the ADC interrupt to occur.
(6) Read ADDATA, the conversion data register.
(7) Clear the interrupt flag bit (ADIF).
(8) For next conversion, go to Step 1 or Step 2 as required. At least 2 Tct is required before next
acquisition starts.
<Note>: To obtain an accurate value, it is necessary to avoid any data transition on I/O pins during
AD conversion.
2. The Demonstration Programs
; To define the general registers
R_0 == 0
; Indirect addressing register
PSW == 3
; Status register
PORT5 == 5
PORT6 == 6
R_F== 0XF
; Interrupt status register
; To define the control register
IOC50 == 0X5
; Control Register of Port 5
IOC60 == 0X6
; Control Register of Port 6
C_INT== 0XF
; Interrupt Control Register
;ADC Control Registers
ADDATA == 0xA
; The contents are the results of ADC
ADCON R== 0x9
; 7
6
5
4
3
2
1
0
This specification is subject to change without prior notice.
06.25.2004 (V1.4)
35



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