參數(shù)資料
型號(hào): μPD784046(A)
廠商: NEC Corp.
英文描述: 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
中文描述: 16位單片機(jī)微控制器(16位單片微控制器)
文件頁(yè)數(shù): 22/90頁(yè)
文件大?。?/td> 613K
代理商: ΜPD784046(A)
μ
PD784044(A), 784046(A)
22
6.2.2 Control registers
(1) Program counter (PC)
This is a 20-bit program counter. Its contents are automatically updated as the program is executed.
Figure 6-4. Program Counter (PC) Format
(2) Program status word (PSW)
This register retains the status of the CPU and its contents are automatically updated as the program is
executed.
Figure 6-5. Program Status Word (PSW) Format
Note
This flag is provided so that the
μ
PD784046(A) maintains compatibility with the 78K/III series. Be sure
to clear this flag to 0 when using 78K/III series software.
(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 high-order 4 bits of this pointer.
Figure 6-6. Stack Pointer (SP) Format
19
0
PC
PSWH
UF
RBS2
RBS1
RBS0
15
14
13
12
11
9
10
8
PSW
PSWL
S
Z
RSS
Note
AC
IE
P/V
0
CY
7
6
5
4
3
1
2
0
SP
0
23
0
0
0
0
20
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