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SN8P26042A 参数 Datasheet PDF下载

SN8P26042A图片预览
型号: SN8P26042A
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: 101 页 / 733 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8P2604A  
8-Bit Micro-Controller  
2.1.4.5 PROGRAM COUNTER  
The program counter (PC) is a 12-bit binary counter separated into the high-byte 4 and the low-byte 8 bits. This  
counter is responsible for pointing a location in order to fetch an instruction for kernel circuit. Normally, the program  
counter is automatically incremented with each instruction during program execution.  
Besides, it can be replaced with specific address by executing CALL or JMP instruction. When JMP or CALL instruction  
is executed, the destination address will be inserted to bit 0 ~ bit 11.  
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0  
PC  
-
-
-
-
PC11 PC10 PC9 PC8 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0  
After  
reset  
-
-
-
-
0
0
0
0
0
0
0
0
0
0
0
0
PCH  
PCL  
)
ONE ADDRESS SKIPPING  
There are nine instructions (CMPRS, INCS, INCMS, DECS, DECMS, BTS0, BTS1, B0BTS0, B0BTS1) with one  
address skipping function. If the result of these instructions is true, the PC will add 2 steps to skip next instruction.  
If the condition of bit test instruction is true, the PC will add 2 steps to skip next instruction.  
B0BTS1  
JMP  
FC  
C0STEP  
; To skip, if Carry_flag = 1  
; Else jump to C0STEP.  
C0STEP:  
NOP  
B0MOV  
B0BTS0  
JMP  
A, BUF0  
FZ  
C1STEP  
; Move BUF0 value to ACC.  
; To skip, if Zero flag = 0.  
; Else jump to C1STEP.  
C1STEP:  
NOP  
If the ACC is equal to the immediate data or memory, the PC will add 2 steps to skip next instruction.  
CMPRS  
JMP  
A, #12H  
C0STEP  
; To skip, if ACC = 12H.  
; Else jump to C0STEP.  
C0STEP:  
NOP  
SONiX TECHNOLOGY CO., LTD  
Page 28  
Version 0.3  
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