6-54
MPC8240 Integrated Processor User’s Manual
FPM or EDO DRAM Interface Operation
6.3.3 FPM or EDO Memory Data Interface
The MPC8240 supports flow-through data path buffering for the DRAM data interface
between the internal processor bus and external memory data bus, which must be
configured as described in Table 6-19 and Table 6-20. Unspecified bit settings have
undefined behavior.
Table 6-19. FPM or EDO Memory Parameters
Bit Name
Register and Offset Bit Number in Register
RAM_TYPE
MCCR1 @ 0xF0
17
EDO
MCCR2 @ 0xF4
16
PCKEN
MCCR1 @ 0xF0
16
WRITE _PARITY_CHK
MCCR2 @ 0xF4
19
INLRD_PARECC_CHK_EN
MCCR2 @ 0xF4
18
INLINE_PAR_NOT_ECC
MCCR2 @ 0xF4
20
BUF_TYPE[0]
MCCR4 @ 0xFC
22
BUF_TYPE[1]
MCCR4 @ 0xFC
20
RMW_PAR
MCCR2 @ 0xF4
0
ECC_EN
MCCR2 @ 0xF4
17
MEM_PARITY_ECC_EN
ErrEnR1 @ 0xC0
2
MB_ECC_ERR_EN
ErrEnR2 @ 0xC4
3
Table 6-20. FPM or EDO System Configurations
RAM_TYPE
EDO
PCKEN
WRITE _P
ARITY_CHK
INLRD_P
ARECC _CHK_EN
INLINE_P
AR_NO
T_ECC
B
UF_TYPE[0]
B
UF_TYPE[1]
RMW_P
AR
ECC_EN
MEM_P
ARITY_ECC_EN
MB_ECC_ERR_EN
Description
1
0
0
0
0
0
0
0
0
0
0
0
FPM, flow-through, no ECC or parity
1
1
0
0
0
0
0
0
0
0
0
0
EDO, flow-through, no ECC or parity
1
0
1
0
0
0
0
0
0
0
1
0
FPM, flow-through, parity enabled
1
1
1
0
0
0
0
0
0
0
1
0
EDO, flow-through, parity enabled
1
0
0
0
0
0
0
0
0
1
1
1
FPM, flow-through, ECC enabled
1
1
0
0
0
0
0
0
0
1
1
1
EDO, flow-through, ECC enabled
1
0
1
0
0
0
0
0
1
0
1
0
FPM, RMW_PAR
1
1
1
0
0
0
0
0
1
0
1
0
EDO, RWM_PAR
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 ...