w65c134s Western Design Center, Inc., w65c134s Datasheet - Page 26

• Manufacturer Part Number: w65c134s
• Description: W65c134s 8-bit Microcontroller
• Manufacturer: Western Design Center, Inc.

1.12 Programming Model, Status Register Coding and Memory Map
The W65C02S Microprocessor Programming Model, Status Register Coding, System Memory Map, I/O
Memory Map, Vector Table, and Pin Map summarize the W65C134S Programming Model and gives the
functional area where each memory and pin is defined. The W65C134S completely decodes the entire
65536 byte address space of the on-chip W65C02S microprocessor. The System Memory Map is
shown in Table 1-3. The on-chip I/O, Timers, Control Registers, Shift Registers, Interrupt Registers, and
Data Registers are presented in Table 1-4, I/O Memory Map. The W65C134S has twenty-two (22)
priority encoded interrupts whose addresses are listed in Table 1-5, Vector Table.
N
V
15
Figure 1-16 W65C02S Microprocessor Programming Model
1
PCH
B
Figure 1-17 W65C02S Status Register Coding
D
1
8
I
Z
7
7
7
7
7
C
PCL
A
Y
X
S
Carry 1 = true
Zero 1 = result
IRQB disable 1 = disable
Decimal mode 1= true
BRK command 1 = BRK, 0 = IRQB
Overflow 1 = true
Negative 1 = neg.
Processor Status Register "P"
Accumulator A
Index Register Y
Index Register X
Program Counter PC
Stack Pointer S
0
0
0
0
0
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