PD17012_15 Datasheet, PDF (51/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
5.8 Program Status Word (PSWORD)
5.8.1 Configuration of program status word
Figure 5-9 shows the configuration of the program status word.
As shown in the figure, the program status word consists of 5 bits: the least significant bit of address 7EH
(RPL) of the system register and the 4 bits of the address 7FH (PSW).
The program status word consists of five flags, each of which functions independently: BCD (BCD), compare
(CMP), carry (CY), zero (Z), and index enable (IXE) flags.
Figure 5-9. Configuration of Program Status Word
Address
Name
Symbol
Bit
Data
7EH
7FH
(RP)
Program status word
(PSWORD)
RPL
PSW
b3 b2 b1 b0 b3 b2 b1 b0
BCCZ I
CMY
X
DP
E
Power-on
Clock stop
CE
0
0
0
0
0
0
Data Sheet U10101EJ4V0DS
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