upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 36
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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5.4 Program Status Word (PSWORD)
5.4.1 Configuration of program status word
7EH (RPL) and 4 bits of 7FH (PSW) of the system register. However, bit 0 of 7FH is always fixed to 0.
flag (CY), zero flag (Z), respectively.
36
Figure 5-4 shows the configuration of the program status word.
As shown in this figure, the program status word consists of a total of 5 bits: the least significant bit of address
Each of the 5 bits in the program status word has its own function as a BCD flag (BCD), compare flag (CMP), carry
Figure 5-4. Program Status Word Configuration
Power-ON
Clock stop
CE
Address
Symbol
Name
Data
Bit
b
0
(RP)
b
RPL
7EH
2
0
0
0
b
2
D
B
C
b
word (PSWORD)
0
Program status
M
C
b
P
0
C
Y
b
PSW
7FH
2
0
0
0
b
Z
2
b
0
0
PD17072,17073
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