Commodore Amiga A500 - Page 44

Timing Requirements for PIC
TlMlNG REQUIREMENTS FOR PIC AS SLAVE (RD & WR CYCLES)
Timing to Backplane
Num
1
2
3
4
5
6
TlMlNG REQUIREMENTS FOR PIC AS MASTER (RD & WR CYCLES)
Num
1
2
3
Timing to PIC
TlMlNG TO BACKPLANE
Unit
ns
ns
ns
ns
ns
ns
Characteristic
AS* low
to SLAVE* Low
AS* high to SLAVE* high
AS* low to
XRDY low (to insert wait)
Read Data Valid
to local 7M low (S7
AS* low to OVR* low
AS* high to OVR* high
Characteristic
7M high(S2) to AS* low
Address
23-1 Valid to AS* low
7M high (M) to Data Valid Wr Cycle
Num
1
2
TlMlNG TO PIC (Plc IN SLAVE MODE)
Min
0
0
0
60
0
0
Min
0
30
Characterisbc
AS* Low to CDAC Low (Setup)
AS* High
to CDAC High (Setup)
Num
1
2
TlMlNG TO PIC (PIC IN MASTER MODE)
Max
35
50
60
50
50
Num
1
Max
67
0
Unit
ns
ns
ns
Unit
ns
ns
Min
20
20
Unit
ns
ns
Charaderiac
Valid Address to AS* Low
Valid
Data from 7M High(%) on Wr to PIC
Characteristic
Valid Data setup
to Local 7M low(S7)
Max
Min
10
Min
15
Max
35
Max
Unit
ns