參數資料
型號: μPD784036(A)
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位單片微控制器)
文件頁數: 22/90頁
文件大小: 402K
代理商: ΜPD784036(A)
μ
PD784035(A), 784036(A)
22
6.2.2 Control registers
(1) Program counter (PC)
This register is a 20-bit program counter. The program counter is automatically updated by program execution.
Figure 6-4. Format of Program Counter (PC)
19
0
PC
(2) Program status word (PSW)
This register holds the CPU state. The program status word is automatically updated by program execution.
Figure 6-5. Format of Program Status Word (PSW)
PSWH
PSWL
PSW
15
14
13
12
UF
RBS2
RBS1
RBS0
11
10
9
8
7
6
5
4
3
2
1
0
S
Z
RSS
Note
AC
IE
P/V
0
CY
Note
This flag is used to maintain compatibility with the 78K/III series. This flag must be set to 0 when programs
for the 78K/III series are being used.
(3) Stack pointer (SP)
This register is a 24-bit pointer for holding the start address of the stack. The high-order 4 bits must be set
to 0.
Figure 6-6. Format of Stack Pointer (SP)
23
20
0
SP
0
0
0
0
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