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EM78156EAS 参数 Datasheet PDF下载

EM78156EAS图片预览
型号: EM78156EAS
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器与MASK ROM [8-Bit Microcontroller with MASK ROM]
分类和应用: 微控制器光电二极管局域网有原始数据的样本ROM
文件页数/大小: 48 页 / 420 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM78156E  
8-Bit Microcontroller with MASK ROM  
Table 4 Usage of Port 6 Input Change Wake-up/Interrupt Function  
Usage of Port 6 input status changed Wake-up/Interrupt  
(I) Wake-up from Port 6 Input Status change  
(II) Port 6 Input Status Change Interrupt  
1. Read I/O Port 6 (MOV R6,R6)  
2. Execute "ENI"  
(a) Before SLEEP  
1. Disable WDT2 (using very carefully)  
2. Read I/O Port 6 (MOV R6,R6)  
3. Execute "ENI" or "DISI"  
3. Enable interrupt (Set IOCF.1)  
4. IF Port 6 change (interrupt)  
Interrupt vector (008H)  
4. Enable interrupt (Set IOCF.1)  
5. Execute "SLEP" instruction  
(b) After Wake-up  
1. IF "ENI" Interrupt vector (008H)  
2. IF "DISI" Next instruction  
PCRD  
ROC  
VCC  
P
R
Q
Q
D
Weakly  
Pull-up  
CLK  
PCWR  
C
L
P
R
PORT  
Q
Q
D
IOD  
PDWR  
C
L
PDRD  
0
1
M
U
X
Rex*  
*The Rex is 430K ohm external resistor  
Fig. 8 The Circuit of I/O Port with R-option(P50,P51)  
4.5 RESET and Wake-up  
4.5.1 RESET  
A RESET is initiated by one of the following events-  
(1) Power on reset.  
2 NOTE: Software disables WDT (watchdog timer) but hardware must be enabled before applying Port  
6 Changed Wake-up function. (CODE Option Register and Bit 11 (ENWDT) are set to “1”).  
Product Specification (V1.3) 07.29.2004  
15  
(This specification is subject to change without further notice)  
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