Pin Description Overview
SysAD Bus Pins |
SysAD[0:63] |
in/out |
Processor Address/Data Bus. |
64 |
SysADC[0:7] |
in/out |
Processor Address/Data Check Bus. |
8 |
SysCMD[0:8] |
in/out |
Processor Command Bus. |
9 |
RdRdy |
out |
Indicates that the corelogic is ready to acceot
a new read transaction. |
1 |
WrRdy |
out |
Indicates that the corelogic is ready to accept
a new write transaction. |
1 |
ExtRequest |
out |
Indicates that the corelogic needs to use the
SysAD bus. |
1 |
Release |
in |
Indicates that the processor has released the
bus to the corelogic. |
1 |
ValidIn |
in |
Indicates that data placed on the SysAD/SysCmd
busses by the processor is valid. |
1 |
ValidOut |
out |
Indicates that data placed on the SysAD/SysCmd
busses by the corelogic is valid. |
1 |
IvdAck |
out |
Indicates the successful completion of a pending
processor invalidate or update request. |
1 |
IvdErr |
out |
Indicates the unsuccessful completion of a pending
processor invalidate or update request. |
1 |
All pins operate as per MIPS R4x00 SysAD Bus.
Total of 89 pins. |
Memory Bus Pins |
MemD0[0:63] |
in/out |
SDRAM Memory Data Bus 0. |
64 |
MemD1[0:63] |
in/out |
SDRAM Memory Data Bus 1. |
64 |
MemA[0:14] |
out |
SDRAM Memory Address Bus. |
15 |
MemECC[0:7] |
in/out |
SDRAM Memory EC/ECC Bus. |
9 |
MemBS[0:15] |
out |
SDRAM Bank Select Signals. |
16 |
MemCS[0:2] |
out |
Device Chip Select 0-2 Signals. |
3 |
MemCS[3]/BootCS |
out |
Device Chip Select 3/Boot ROM CS Signal. |
1 |
MemDM[0:7] |
out |
SDRAM Data Mask Bus. |
8 |
MemDS[0:8] |
in/out |
DDR SDRAM Data Strobes. |
9 |
MemRAS[0:3] |
out |
SDRAM Row Address Command Indicators. |
4 |
MemCAS[0:3] |
out |
SDRAM Column Address Command Indicators. |
4 |
MemWE[0:3] |
out |
SDRAM Write Enable Command Indicators. |
4 |
MemCKE[0:7] |
out |
SDRAM Clock Enable Indicators. |
8 |
MemReset# |
out |
DDR SDRAM Reset. Low (Asserted) at corelogic
reset. |
1 |
MemCLK |
out |
SDRAM Clock Signal. |
1 |
MemCK0 |
out |
DDR SDRAM Differential Clock Signal. |
1 |
MemCK0# |
out |
DDR SDRAM Differential Clock Signal. |
1 |
All pins operate as per SDRAM/DDR SDRAM specification.
Total of 212 pins. |
Peripheral Interface Bus
|
FBus[0:63] |
in/out |
64-bit data/address bus. operates either in 1
address + 8 data cycle bursts, and multiples thereof, or in 1 address +
1 data cycle mode. |
64 |
FBusReq# |
in |
Request for bus from F-Southbridge |
1 |
FBusGnt# |
out |
Grant of bus to F-Southbridge |
1 |
Total of 66 pins. |
Miscellaneous Pins |
Reset# |
in |
F-Corelogic Reset Signal. F-Corelogic exits reset
state on the rising edge of Reset# |
1 |
VCC |
|
F-Corelogic Power. 1.5V? 3V? 5V? |
? |
GND |
|
F-Corelogic Ground. |
? |
PicInt[0:15] |
in |
PIC Interrupt Signals. Operates as per F-CPU
PIC Specification 1.0. |
32 |
PicNMI |
in |
PIC Non-Maskable Interrupt Signal. Operateas
as per F-CPU PIC Specification 1.0. |
1 |
I2c_SDA |
in/out |
I2C Bus Serial Data. Operates as per I2C Specification
?.?. |
1 |
I2c_SCK |
out |
I2C Bus Serial Clock. Operates as per I2C Specification
?.?. |
1 |
CPUDet[0:3] |
in |
When input voltage is VCC, indicates presense
of CPU. |
4 |
Total of 29+? pins. |
Grand total of 396+? pins.