Motorola MVME2401-1 Installation And Use Manual page 68

Functional Description
Table 3-10. PPC Bus to ROM/Flash Access Timing (120ns @ 100MHz)
3
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read (1 byte)
1-Beat Read (2 to 8 bytes)
1-Beat Write
Table 3-11. PPC Bus to ROM/Flash Access Timing (80ns @ 100MHz)
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read (1 byte)
1-Beat Read (2 to 8 bytes)
1-Beat Write
3-20
CLOCK PERIODS REQUIRED FOR:
1st Beat
16 64
Bits Bits
70 22
22 22
70 22
21 21
Note: The information in Table 3-10 is appropriate when configured with
devices with an access time equal to 12 CLK periods.
CLOCK PERIODS REQUIRED FOR:
1st Beat
16 64
Bits Bits
54 18
N/A
18 18
54 18
21 21
Note: The information in Table 3-11 is appropriate when configured with
devices with an access time equal to 8 CLK periods.
2nd Beat 3rd Beat
16 64 16 64
Bits Bits Bits Bits
64 16 64 16
N/A
- - - -
- - - -
- - - -
2nd Beat 3rd Beat
16 64 16 64
Bits Bits Bits Bits
48 12 48 12
- - - -
- - - -
- - - -
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Total
Clocks
4th Beat
16 64 16 64
Bits Bits Bits Bits
64 16 262 70
N/A
- - 22 22
- - 70 22
- - 21 21
Total
Clocks
4th Beat
16 64 16 64
Bits Bits Bits Bits
48 12 198 54
N/A
- - 18 18
- - 54 18
- - 21 21