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SN8P1604AK 参数 Datasheet PDF下载

SN8P1604AK图片预览
型号: SN8P1604AK
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
文件页数/大小: 94 页 / 531 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8P1600  
8-bit micro-controller  
WORKING REGISTERS  
The RAM bank0 locations 82H to 84H store the specially defined registers such as register R, Y, Z, respectively shown  
in the following table. These registers can use as the general-purpose working buffer or access ROM’s and RAM’s  
data. For instance, all of the ROM table can be looked-up by R, Y and Z registers. The data of RAM memory can be  
indirectly accessed with Y and Z registers.  
Y, Z REGISTERS  
The Y and Z registers are the 8-bit buffers. There are three major functions of these registers. First, Y and Z registers  
can be used as working registers. Second, these two registers can be used as data pointers for @YZ register. Third,  
the registers can address ROM location to look up ROM data.  
084H  
Y
Read/Write  
After reset  
Bit 7  
YBIT7  
R/W  
0
Bit 6  
YBIT6  
R/W  
0
Bit 5  
YBIT5  
R/W  
0
Bit 4  
YBIT4  
R/W  
0
Bit 3  
YBIT3  
R/W  
0
Bit 2  
YBIT2  
R/W  
0
Bit 1  
YBIT1  
R/W  
0
Bit 0  
YBIT0  
R/W  
0
083H  
Z
Read/Write  
After reset  
Bit 7  
ZBIT7  
R/W  
0
Bit 6  
ZBIT6  
R/W  
0
Bit 5  
ZBIT5  
R/W  
0
Bit 4  
ZBIT4  
R/W  
0
Bit 3  
ZBIT3  
R/W  
0
Bit 2  
ZBIT2  
R/W  
0
Bit 1  
ZBIT1  
R/W  
0
Bit 0  
ZBIT0  
R/W  
0
The @YZ that is data point_1 index buffer located at address 0E7H in RAM bank 0. It employs Y and Z registers to  
addressing RAM location to read/write data through ACC. The Lower 4-bit of Y register points to RAM bank number  
and Z register to RAM address number, respectively. The higher 4-bit data of Y register is truncated in RAM indirectly  
access mode.  
Example: Following example uses indirectly addressing mode to access data in the RAM address 025H of  
bank0.  
B0MOV  
B0MOV  
B0MOV  
Y, #00H  
Z, #25H  
A, @YZ  
; To set RAM bank 0 for Y register  
; To set location 25H for Z register  
; To read a data into ACC  
Example: Clear general-purpose data memory area of bank 0 using @YZ register.  
B0MOV  
B0MOV  
Y, #0  
Z, #07FH  
; Y = 0, bank 0  
; Z = 7FH, the last address of the data memory area  
CLR_YZ_BUF:  
CLR  
@YZ  
; Clear @YZ to be zero  
DECMS  
JMP  
Z
; Z – 1, if Z= 0, finish the routine  
; Not zero  
CLR_YZ_BUF  
CLR  
.
@YZ  
END_CLR:  
; End of clear general purpose data memory area of bank 0  
Note: Please consult the “LOOK-UP TABLE DESCRIPTION” about Y, Z register look-up table application.  
SONiX TECHNOLOGY CO., LTD  
Page 25  
Revision 1.94  
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