Table 3-4. Powerpc 60X Bus To Rom/Flash Access Timing When Configured For 64 Bits (32 Bits Per Falcon); Table 3-5. Powerpc 60X Bus To Rom/Flash Access Timing When Configured For 16 Bits (8 Bits Per Falcon); Rom/Flash Speeds - Motorola MVME3600 Series Programmer's Reference Manual

ROM/Flash Speeds

The Falcon pair provides the interface for two blocks of ROM/Flash. Each
block can address up to 64Mbytes of memory depending on the width
implemented for that block (16 bits or 64 bits). Bank A is 64-bit wide and
bank B is 16-bit wide. The access times for ROM/Flash are shown in
Table 3-4
Table 3-4. PowerPC 60 x Bus to ROM/Flash Access Timing when Configured
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read
1-Beat Write
Table 3-5. PowerPC 60 x Bus to ROM/Flash Access Timing when Configured
ACCESS TYPE
4-Beat Read
4-Beat Write
1-Beat Read (2 bytes to 8 bytes)
1-Beat Read (1 byte)
1-Beat Write
http://www.motorola.com/computer/literature
and Table 3-5.
for 64 bits (32 Bits per Falcon)
CLOCK PERIODS REQUIRED FOR:
1st
Beat
20
N/A
20
19
for 16 Bits (8 Bits per Falcon)
CLOCK PERIODS REQUIRED FOR:
1st
Beat
68
N/A
68
20
19
Functional Description
2nd 3rd
Beat Beat
16 16
N/A N/A
- -
- -
2nd 3rd
Beat Beat
64 64
N/A N/A
- -
- -
- -
Total
4th
Clocks
Beat
16 68
N/A N/A
- 20
- 19
Total
4th
Clocks
Beat
64 260
N/A N/A
- 68
- 20
- 19
3-11
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