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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  
Bit 4 (T) Time-out bit.  
Set to 1 with the "SLEP" and "WDTC" commands, or during power up and  
reset to 0 by WDT time-out.  
Bit5 ~7 (GP0 ~ 2) General purpose read/write bits.  
4.1.5 R4 (RAM Select Register)  
Bits 0~5 are used to select registers (address: 00~06, 0F~3F) in the indirect  
addressing mode.  
Bits 6~7 are not used.(read only).  
The Bits 6~7 set to “1” at all time.  
Z flag of R3 will set to “1”, when R4 content is equal to “3F” When R4=R4+1,  
R4 content will select as R0.  
See the configuration of the data memory in Fig. 4.  
4.1.6 R5 ~ R6 (Port 5 ~ Port 6)  
R5 and R6 are I/O registers.  
Only the lower 4 bits of R5 are available.  
4.1.7 RF (Interrupt Status Register)  
7
6
5
4
3
2
1
0
-
-
-
-
-
EXIF  
ICIF  
TCIF  
“1” means interrupt request, and “0” means no interrupt occur.  
Bit 0 (TCIF) TCC overflow interrupt flag. Set when TCC overflows, reset by software.  
Bit 1 (ICIF) Port 6 input status change interrupt flag. Set when Port 6 input changes,  
reset by software.  
Bit 2 (EXIF) External interrupt flag. Set by falling edge on /INT pin, reset by software.  
Bits 3 ~ 7 Not used.  
RF can be cleared by instruction but cannot be set.  
IOCF is the interrupt mask register.  
Note that the result of reading RF is the "logic AND" of RF and IOCF.  
4.1.8 R10 ~ R3F  
All of these are 8-bit general-purpose registers.  
Product Specification (V1.3) 07.29.2004  
7  
(This specification is subject to change without further notice)  
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