msm80c85ahrs Oki Semiconductor, msm80c85ahrs Datasheet - Page 2

• Manufacturer Part Number: msm80c85ahrs
• Description: 8-bit Cmos Microprocessor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
FUNCTIONAL BLOCK DIAGRAM
X
X
1
2
Accumulator
Power
Supply
(8)
CLK
GEN
Power Down
OUT
CLK
READY RD WR ALE
+5V
GND
Temporary Register
INTR INTA
Control
(8)
Interrupt Control
5.5 6.5
S0
RST
Timing And Control
Status
S1 IO / M HOLD HLDA RESET IN RESET OUT
Arithmetic
Logic Unit
7.5 TRAP
Flip Flops
Flag (5)
ALU(8)
8-Bit Internal Data Bus
DMA
Reset
Register (8)
Instruction
Instruction
Encoding
Decoder
Machine
Cycle
And
Serial I/O Control
SID
B REG (8)
D REG (8)
H REG (8)
Incrementer/Decrementer
Program Counter (16)
Address Latch (16)
Stack Pointer (16)
Address Buffer (8)
Address Bus
SOD
A
15
MSM80C85AHRS/GS/JS
- A
8
C REG (8)
E REG (8)
C REG (8)
Register
Array
Address/Data Bus
Data/Address
Buffer (8)
AD
7
- AD
0
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