參數(shù)資料
型號(hào)： ADuC812
廠商： Analog Devices, Inc.
英文描述： 12-Bit ADC with Embedded FLASH MCU(12位8通道A/D轉(zhuǎn)換器)
中文描述： 12位ADC，嵌入式閃存微控制器（12位8通道的A / D轉(zhuǎn)換器）
文件頁(yè)數(shù)： 15/31頁(yè)
文件大小： 543K
代理商： ADUC812
REV. 0
ADuC812
–
15
–
TCON.0
ITO
IE1.0
EX0
IE2.1
EPSM
PSCON.5
PX0
IP.0
PADC
IP.6
IE1.6
EADC
PT0
IP.1
IE1.1
TCON.5
PX1
IP.2
IE1.2
TCON.3
TCON.2
PT1
IP.3
PSI
IP.7
PS
IP.4
IE1.4
SCON.1
T2CON.7
SCON.0
RI
TI
PT2
IP.5
IE1.5
T2CON.6
TF2
HIGH PRIORITY
LOW PRIORITY
POWER SUPPLY
MONITOR
EXTERNAL INT0
P3.2
END OF ADC
OR ADC DMA
MODE CONVERSION
TIMER 0
OVERFLOW
EXTERNAL INT1
P3.3
TIMER 1
OVERFLOW
SPI/I2C
PORT
UART
TIMER 2
OVERFLOW
P1.1/T2EX
T2CON.3
EXF2
IE0
TCON.1
PSMI
ADCI
AC2.7
ET0
TF0
IT1
IE1
EX1
TF1
TCON.7
IE1.3
ET1
IE2.0
ESI
SPICON.7
I2CCON.0
I2CI
ISPI
=1
ES
=1
EXEN.2
ET2
=1
Figure 14. Interrupt Request Sources
06H A5H 32H 05H 0DH
05H A5H 32H 05H 0DH
04H A5H 32H 05H 0DH
03H FFH FFH FFH FFH
02H A5H 32H 05H 0DH
01H A5H 32H 05H 0DH
00H A5H 32H 05H 0DH
0DH
05H
F3H
A5H
EDATA4
EDATA3
EDATA2
EDATA1
WRITE NEW BYTE
TO EDATA2
MOV EDATA2, #0F3H ;WRITE NEW
BYTE
ERASE
ERASE PAGE 03H
AND WRITE NEW DATA
TO PAGE 03H
MOV ECON, #05 ;ERASE PAGE
MOV ECON, #02H ;PROGRAM
PAGE
WRITE
06H A5H 32H 05H 0DH
05H A5H 32H 05H 0DH
04H A5H 32H 05H 0DH
03H A5H 32H 05H 0DH
02H A5H 32H 05H 0DH
01H A5H 32H 05H 0DH
00H A5H 32H 05H 0DH
0DH
05H
32H
A5H
EDATA4
EDATA3
EDATA2
EDATA1
READ PAGE 03H
MOV EADRL, #03H ;SET P PAGE
POINTER
MOV ECON, #01H ;INITIATE READ
MODE
0DH
05H
F3H
A5H
EDATA4
EDATA3
EDATA2
EDATA1
06H A5H 32H 05H 0DH
05H A5H 32H 05H 0DH
04H A5H 32H 05H 0DH
03H A5H 32H 05H 0DH
02H A5H F3H 05H 0DH
01H A5H 32H 05H 0DH
00H A5H 32H 05H 0DH
Figure 13. User Flash/EE Memory Program Byte Example
The new byte is then written to the EDATA2 SFR, followed by
an ERASE cycle that will ensure this page is erased before the
new page data EDATA1-4 is written back into memory.
If the user attempts to initiate a PROGRAM cycle (ECON
set to 02H) without an ERASE cycle (ECON set to 05H),
then only bit locations set to a “1” would be modified, i.e., the
Flash/EE memory byte location must be pre-erased to allow a
valid write access to the array. It should also be noted that the
time durations for an ERASE-ALL command (640 bytes) and
that for an ERASE page command (four bytes) are identical,
i.e., 20 ms.
This example coded in 8051 assembly would appear as :
MOV
MOV
MOV
MOV
MOV
EADRL, #03H
ECON, #01H
EDATA2, #0F3H
ECON, #02H
ECON, #05H
;
Set Page Pointer
;
Read Page Command
;
Write New Byte
;
Erase Page Command
; Program Page Command
INTERRUPT SYSTEM
The ADuC812 provides nine interrupt sources with two priority
levels. Interrupt priority within a given level is shown in de-
scending order of priority in Figure 14, which gives a general
overview of the interrupt sources and illustrates the request and
control flags. The interrupt vector addresses for corresponding
interrupts are also included in Table VII.
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