參數(shù)資料
型號: EM78P870
廠商: ELAN Microelctronics Corp .
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 30/48頁
文件大?。?/td> 313K
代理商: EM78P870
EM78P870
8-bit OTP Micro-controller
_________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
27
8/19/2004 (V1.5)
Set port7(3:0) input (IOC7 (7:0) =
set IOC page1
(BS R3,IOC_PAGE)
port7 pull high (IOCA=0x0f)
set IOC page0
(BC R3,IOC_PAGE)
enable key scan signal (RE bit4=1)
set INT0 interrupt
ENI
“0x0f” )
Interrupt occur
Y
N
Enable main clock (Normal mode)
program delay
enable RE(6) key check
Read port7 ( column key )
disable RE(6) key check
set strobe function
enable RE (5) keystrobe
program delay
read IOC7,IOC8 (row key)
Get the key location
Execution
key function
Fig.15 key scan flow by interrupt trigger
PAGE1 (Data RAM address8 ~ address11)
7
6
X
X
Bit 0 ~ Bit 3 (RAMA8 ~ RAMA11) : Data RAM address (address8 to address10) for RAM reading.
Bit 4~5 = 0 : unused
Bit6~Bit7 : Un-defined register. These two bits are un-define and their values will variation.
Bit 6 (DED) : Interrupt flag of Differential Energy Detector (DED) output data
Bit 7 (DEDD) : Output data of Differential Energy Detector (DED) If input signal from EGIN1 and EGIN2 pin
to Differential Energy Detector is over the threshold level setting at IOCE PAGE 2 bit 0 (SEDTHD), the DED
will extract the zero-crossing pulse waveform corresponding to input signal.
RF (Interrupt flags)
7
6
5
4
3
RBF
INT2
INT1
INT0
"1" means interrupt request, "0" means non-interrupt
Bit 0 (TCIF) : TCC timer overflow interrupt flag
Set when TCC timer overflows .
Bit 1 (CNT1) : Counter1 timer overflow interrupt flag
5
0
4
0
3
2
1
0
RAMA11
RAMA10
RAMA9
RAMA8
2
1
0
CNT2
CNT1
TCIF
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