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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  
4 FUNCTION DESCRIPTION  
OSCO  
/RESET  
OSCI  
TCC /INT  
WDT timer  
Prescaler  
Oscillator/Timing  
Control  
ROM  
R2  
Stack  
ALU  
IOCA  
RAM  
Interrupt  
Controller  
Instruction  
Register  
R3  
R1(TCC)  
R4  
Instruction  
Decoder  
ACC  
DATA & CONTROL BUS  
P60//INT  
P61  
P62  
IOC6  
R6  
IOC5  
R5  
P50  
I/O  
PORT 6  
I/O  
PORT 5  
P63  
P64  
P65  
P66  
P67  
P51  
P52  
P53  
Fig. 2 Function Block Diagram  
4.1 Operational Registers  
4.1.1 R0 (Indirect Addressing Register)  
R0 is not a physically implemented register. Its major function is to perform as an  
indirect addressing pointer. Any instruction using R0 as a pointer actually accesses  
data pointed by the RAM Select Register (R4).  
4.1.2 R1 (Time Clock /Counter)  
Increased by an external signal edge which is defined by TE bit (CONT-4) through  
the TCC pin, or by the instruction cycle clock.  
Writable and readable as any other registers.  
Defined by resetting PAB(CONT-3).  
The prescaler is assigned to TCC, if the PAB bit (CONT-3) is reset.  
The contents of the prescaler counter will be cleared only when TCC register is  
written with a value.  
4 •  
Product Specification (V1.3) 07.29.2004  
(This specification is subject to change without further notice)  
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