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EM78P447SBWM 参数 Datasheet PDF下载

EM78P447SBWM图片预览
型号: EM78P447SBWM
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-BIT MICRO-CONTROLLER]
分类和应用: 微控制器外围集成电路光电二极管可编程只读存储器
文件页数/大小: 55 页 / 1601 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM78P447S  
OTP ROM  
4. FUNCTION DESCRIPTION  
OSCI OSCO  
/RESET  
TCC /INT  
W DT Tim er  
STACK 1  
STACK 2  
STACK 3  
STACK 4  
STACK 5  
P C  
Oscillator/Tim ing  
Control  
Prescale  
r
ROM  
W DT  
Tim-eout  
Interrupt  
Control  
Instruction  
Register  
R1(TCC)  
ALU  
ACC  
Instruction  
Decoder  
Sleep  
&
RAM  
R4  
R3  
W ake  
Control  
DATA & CONTROL BUS  
IOC6  
IOC5  
R5  
IOC7  
R7  
R6  
PPPPPPPP  
66666666  
01234567  
PPPPPPPP  
55555555  
01234567  
PPPPPPPP  
77777777  
01234567  
Fig. 2 Functional Block Diagram  
4.1 Operational Registers  
1. R0 (Indirect Addressing Register)  
R0 is not a physically implemented register. Its major function is to act as an indirect addressing  
pointer. Any instruction using R0 as a pointer actually accesses data pointed by the RAM Select  
Register (R4).  
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 a value.  
This specification is subject to change without prior notice.  
8
06.25.2003 (V1.1)  
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