參數(shù)資料
型號(hào)： UPD784225GK
廠商： NEC Corp.
英文描述： 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 16/8-BIT單晶片微控制器
文件頁(yè)數(shù)： 24/92頁(yè)
文件大?。?/td> 687K
代理商： UPD784225GK
24
μ
PD784224, 784225, 784224Y, 784225Y
Data Sheet U12376EJ1V0DS00
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 6-4. Program Counter (PC) Format
19
0
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 6-5. Program Status Word (PSW) Format
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
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 6-6. Stack Pointer (SP) Format
23
0
PC
20
0
0
0
0
相關(guān)PDF資料
PDF描述
UPD784224 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224GC 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224GK 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224Y 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784225 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
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