Motorola MVME2401-1 Installation And Use Manual page 69

Table 3-12. PPC Bus to ROM/Flash Access Timing (50ns @ 100MHz)
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read (1 byte)
1-Beat Read (2 to 8 bytes)
1-Beat Write
Note: The information in Table 3-12 is appropriate when configured with
devices with an access time equal to 5 CLK periods.
Table 3-13. PPC Bus to ROM/Flash Access Timing (30ns @ 100MHz)
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read (1 byte)
1-Beat Read (2 to 8 bytes)
1-Beat Write
Note: The information in Table 3-13 is appropriate when configured with
devices with an access time equal to 3 CLK periods.
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CLOCK PERIODS REQUIRED FOR:
1st Beat 2nd Beat
16 64 16 64
Bits Bits Bits Bits
42 15 36 9
N/A
15 15 - -
42 15 - -
21 21 - -
CLOCK PERIODS REQUIRED FOR:
1st Beat 2nd Beat
16 64 16 64
Bits Bits Bits Bits
34 13 28 7
N/A
13 13 - -
34 13 - -
21 21 - -
3rd Beat 4th Beat
16 64 16 64
Bits Bits Bits Bits
36 9 36 9
- - - -
- - - -
- - - -
3rd Beat 4th Beat
16 64 16 64
Bits Bits Bits Bits
28 7 28 7
- - - -
- - - -
- - - -
Block Diagram
3
Total
Clocks
16 64
Bits Bits
150 42
N/A
15 15
42 15
21 21
Total
Clocks
16 64
Bits Bits
118 34
N/A
13 13
34 13
21 21
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