GMS81508A Datasheet, PDF (12/91 Pages) Hynix Semiconductor – USERS MANUAL

GMS81508/16
2. FUNCTIONS
2.1. REGISTERS
6 registers are built-in the CPU of G8MC. Accumulator(A), Index register X, Y, Stack Pointer (SP)
and Program Status Word(PSW) consists of 8-bit registers. Program Counter(PC) consists of 16-
bit registers. The contents of these registers are undefined after RESET.
15
87
0
PCH
PCL
Program Counter
7
0
A
A - Register
15
87
0
Y
A
( YA 16bit Accumulator )
7
0
X
X - Register
7
0
Y
Y - Register
7
0
SP
Stack Pointer
7
0
PSW
Program Status Word
NVGBH I ZC
Carry Flag
Zero Flag
Interrupt Enable Flag
Half Carry Flag
Break Flag
G ( Direct Page ) Flag
Overflow Flag
Negative Flag
7