參數(shù)資料
型號: 784217A
廠商: NEC Corp.
英文描述: MOS INTEGRATED CIRCUIT
中文描述: 馬鞍山集成電路
文件頁數(shù): 30/100頁
文件大?。?/td> 564K
代理商: 784217A
Data Sheet U14121EJ2V0DS00
30
μ
PD784214A, 784215A, 784216A, 784217A, 784218A, 784214AY, 784215AY, 784216AY, 784217AY, 784218AY
6.2.2 Control registers
(1) Program counter (PC)
The program counter is a 20-bit register whose contents are automatically updated when the program is
executed.
Figure 6-7. Format of Program Counter (PC)
(2) Program status word (PSW)
This register holds the statuses of the CPU. Its contents are automatically updated when the program is
executed.
Figure 6-8. Format of Program Status Word (PSW)
Note
This flag is provided to maintain compatibility with the 78K/III Series. Be sure to clear this flag to 0,
except when the software for the 78K/III Series is used.
(3) Stack pointer (SP)
This is a 24-bit pointer that holds the first address of the stack. Be sure to write 0 to the higher 4 bits of this
pointer.
Figure 6-9. Format of Stack Pointer (SP)
19
0
PC
15
14
13
12
11
10
9
8
UF
RBS2
RBS1
RBS0
PSWH
7
6
5
4
3
2
1
0
S
Z
RSS
Note
AC
IE
P/V
0
CY
PSWL
PSW
23
0
SP
20
0
0
0
0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
784217AY 制造商:NEC 制造商全稱:NEC 功能描述:MOS INTEGRATED CIRCUIT
784218A 制造商:NEC 制造商全稱:NEC 功能描述:MOS INTEGRATED CIRCUIT
784218AY 制造商:NEC 制造商全稱:NEC 功能描述:MOS INTEGRATED CIRCUIT
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