6-78
MPC8240 Integrated Processor User’s Manual
ROM/Flash Interface Operation
Figure 6-53. ROM/Flash Address Multiplexing—32-Bit Mode
Address multiplexing for the 64-bit mode occurs according to the interface configuration
settings as shown in Figure 6-54.
.
Figure 6-54. ROM/Flash Address Multiplexing—64-Bit Mode
6.4.2 64 or 32-Bit ROM/Flash Interface Timing
The MPC8240 provides 20 address bits with which to access 8 Mbytes of external 64-bit
ROM and 21 address bits with which to access 8 Mbytes of external 32-bit ROM. In
addition, two ROM chip selects (RCS0, RCS1) allow addressing of ROM memories of up
to 16 Mbytes.
MPC8240
Output
Signals
32-bit Mode
Physical Address
0–8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
SDMA
1
0
9
8
7
6
5
4
3
2
1
0
SDBA
0
PAR
0
1
2
3
4
5
6
7
SDMA
1
2
Logical
Names
AR
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
0
MPC8240
Output
Signals
64-bit Mode
Physical Address
0–8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
SDMA
1
0
9
8
7
6
5
4
3
2
1
0
SDBA
0
PAR
0
1
2
3
4
5
6
7
Logical
Names
AR
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
0
Summary of Contents for MPC8240
Page 1: ...MPC8240UM D Rev 1 1 2001 MPC8240 Integrated Processor User s Manual ...
Page 38: ...xviii MPC8240 Integrated Processor User s Manual TABLES Table Number Title Page Number ...
Page 48: ...xlviii MPC8240 Integrated Processor User s Manual Acronyms and Abbreviations ...
Page 312: ...6 94 MPC8240 Integrated Processor User s Manual ROM Flash Interface Operation ...
Page 348: ...7 36 MPC8240 Integrated Processor User s Manual PCI Host and Agent Modes ...
Page 372: ...8 24 MPC8240 Integrated Processor User s Manual DMA Register Descriptions ...
Page 394: ...9 22 MPC8240 Integrated Processor User s Manual I2O Interface ...
Page 412: ...10 18 MPC8240 Integrated Processor User s Manual Programming Guidelines ...
Page 454: ...12 14 MPC8240 Integrated Processor User s Manual Internal Arbitration ...
Page 466: ...13 12 MPC8240 Integrated Processor User s Manual Exception Latencies ...
Page 516: ...16 14 Watchpoint Trigger Applications ...
Page 538: ...B 16 MPC8240 Integrated Processor User s Manual Setting the Endian Mode of Operation ...
Page 546: ...C 8 MPC8240 Integrated Processor User s Manual ...
Page 640: ...INDEX Index 16 MPC8240 Integrated Processor User s Manual ...