MC146805E2CFN INNOVASIC [InnovASIC, Inc], MC146805E2CFN Datasheet - Page 10

• Manufacturer Part Number: MC146805E2CFN
• Description: Microprocessor Unit
• Manufacturer: INNOVASIC [InnovASIC, Inc]

PIN = LOW
RESET_N
IA6805E2
Microprocessor Unit
Copyright
innovASIC
Y
PRESCALER <= $7F
PUT 1FFE,1FFF ON
CLR IRQ_N LOGIC
ADDRESS BUS
TIMER <= $FF
SP <= $007F
TCR <= $7f
1FFE/1FFF
DDRs <= 0
I_CC <= 1
LOAD PC
2002
RESET
RESET
N
FROM
The End of Obsolescence
IN
?
PIN = LOW
RESET_N
Figure 8. Reset and Interrupt Processing Flowchart
SET
INSTRUCTION
INSTRUCTION
EXECUTE ALL
INSTRUCTION
IS FETCHED
TCR7=1?
AN SWI?
CYCLES
TCR6=0
FETCH
IRQ_N
EDGE
N
N
N
I BIT
AND
?
?
CLEAR
ENG21108140100
Page 10 of 31
Y
Y
Y
PC+1=>PC
REQUEST
CLEAR
LATCH
IRQ_N
As of Production Version 00
IRQ_N
TIMER
SWI
Data Sheet
www.innovasic.com
Customer Support:
1-888-824-4184
IRQ_N: 1FFA/1FFB
TIMER WAIT:1FF6/
TIMER: 1FF8/1FF9
LOAD PC FROM:
SWI: 1FFC/1FFD
PC, X, A, CC
STACK
I <= 1
1FF7