欢迎访问ic37.com |
会员登录 免费注册
发布采购

SN8A1704A 参数 Datasheet PDF下载

SN8A1704A图片预览
型号: SN8A1704A
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: 145 页 / 774 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
 浏览型号SN8A1704A的Datasheet PDF文件第25页浏览型号SN8A1704A的Datasheet PDF文件第26页浏览型号SN8A1704A的Datasheet PDF文件第27页浏览型号SN8A1704A的Datasheet PDF文件第28页浏览型号SN8A1704A的Datasheet PDF文件第30页浏览型号SN8A1704A的Datasheet PDF文件第31页浏览型号SN8A1704A的Datasheet PDF文件第32页浏览型号SN8A1704A的Datasheet PDF文件第33页  
SN8P1700  
8-bit micro-controller build-in 12-bit ADC  
GENERAL PURPOSE PROGRAM MEMORY AREA  
The 40891-word at ROM locations 0010H~0FFEH are used as general-purpose memory. The area is stored  
instruction’s op-code and look-up table data. The SN8P1700 includes jump table function by using program counter  
(PC) and look-up table function by using ROM code registers (R, X, Y, Z).  
The boundary of program memory is separated by the high-byte program counter (PCH) every 100H. In jump table  
function and look-up table function, the program counter can’t leap over the boundary by program counter  
automatically. Users need to modify the PCH value to “PCH+1” as the PCL overflow (from 0FFH to 000H).  
Notice: 1:The SN8P1702’s ROM size is about 1K words and the SN8P1704’s ROM size is about 2K words.  
LOOKUP TABLE DESCRIPTION  
In the ROM’s data lookup function, the X register is pointed to the highest 8-bit, Y register to the middle 8-bit and Z  
register to the lowest 8-bit data of ROM address. After MOVC instruction is executed, the low-byte data of ROM then  
will be stored in ACC and high-byte data stored in R register.  
Example: To look up the ROM data located “TABLE1”.  
B0MOV  
B0MOV  
MOVC  
Y, #TABLE1$M ; To set lookup table1’s middle address  
Z, #TABLE1$L  
; To set lookup table1’s low address.  
; To lookup data, R = 00H, ACC = 35H  
;
; Increment the index address for next address  
INCMS  
JMP  
INCMS  
NOP  
Z
@F  
Y
; Z+1  
; Not overflow  
; Z overflow (FFH 00), Y=Y+1  
; Not overflow  
;
MOVC  
.
; To lookup data, R = 51H, ACC = 05H.  
;
@@:  
.
TABLE1:  
DW  
DW  
DW  
0035H  
5105H  
2012H  
; To define a word (16 bits) data.  
; “  
; “  
CAUSION: The Y register can't increase automatically if Z register cross boundary from 0xFF to 0x00.  
Therefore, user must take care such situation to avoid loop-up table errors. If Z register overflow, Y  
register must be added one. The following INC_YZ macro shows a simple method to process Y and Z  
registers automatically.  
Note: Because the program counter (PC) is only 12-bit, the X register is useless in the application. Users  
can omit “B0MOV X, #TABLE1$H”. SONiX ICE support more larger program memory addressing  
capability. So make sure X register is “0” to avoid unpredicted error in loop-up table operation.  
Example: INC_YZ Macro  
INC_YZ  
MACRO  
INCMS  
JMP  
Z
; Z+1  
@F  
; Not overflow  
INCMS  
NOP  
Y
; Y+1  
; Not overflow  
@@:  
ENDM  
SONiX TECHNOLOGY CO., LTD  
Page 29  
Revision 1.94  
 复制成功!