IntelR 80960 RN I/O Processor Datasheet

Intel ® 80960RN I/O Processor
Table 7. Secondary PCI Bus Signals (Sheet 1 of 2)
Name Count Type Description
S_AD[31:0] 32
S_AD[63:32] 32
S_PAR 1
S_PAR64 1
S_C/BE[3:0]# 4
S_C/BE[7:4]# 4
S_REQ64# 1
S_ACK64# 1
S_FRAME# 1
S_IRDY# 1
S_TRDY# 1
S_STOP# 1
I/O
5V
Sync(P)
Srst(0)
I/O
5V
Sync(P)
Srst(Z)
S32(H)
I/O
Sync(P)
Srst(0)
I/O
5V
Sync(P)
Srst(Z)
S32(H)
I/O
5V
Sync(P)
Srst(0)
I/O
5V
Sync(P)
Srst(Z)
S32(H)
I/O
5V
Sync(P)
Srst(Q)
S32(Z)
I/O
5V
Sync(P)
Srst(Z)
S32(Z)
I/O
5V
Sync(P)
Srst(Z)
I/O
5V
Sync(P)
Srst(Z)
I/O
5V
Sync(P)
Srst(Z)
I/O
5V
Sync(P)
Srst(Z)
SECONDARY PCI ADDRESS/DATA is the multiplexed secondary
PCI address and lower 32 bits of the data bus.
SECONDARY PCI DATA is the upper 32 bits of the secondary PCI
data bus.
SECONDARY PCI BUS PARITY is even parity across S_AD[31:0]
and S_C/BE[3:0]#.
SECONDARY PCI BUS UPPER DWORD PARITY is even parity
across S_AD[63:32] and S_C/BE[7:4]#.
SECONDARY PCI BUS COMMAND and BYTE ENABLES are
multiplexed on the same PCI pins. During the address phase, they
define the bus command. During the data phase, they are used as
the byte enables for S_AD[31:0].
SECONDARY PCI BYTE ENABLES are used as byte enables for
S_AD[63:32] during secondary PCI data phases.
SECONDARY PCI BUS REQUEST 64-BIT TRANSFER indicates
the attempt of a 64-bit transaction on the secondary PCI bus. If the
target is 64-bit capable, the target acknowledges the attempt with
the assertion of S_ACK64#.
SECONDARY PCI BUS ACKNOWLEDGE 64-BIT TRANSFER
indicates that the device has positively decoded its address as the
target of the current access, indicates the target is willing to transfer
data using 64 bits.
SECONDARY PCI BUS CYCLE FRAME is asserted to indicate the
beginning and duration of an access.
SECONDARY PCI BUS INITIATOR READY indicates the initiating
agent’s ability to complete the current data phase of the
transaction. During a write, it indicates that valid data is present on
the secondary Address/Data bus. During a read, it indicates the
processor is ready to accept the data.
SECONDARY PCI BUS TARGET READY indicates the target
agent’s ability to complete the current data phase of the
transaction. During a read, it indicates that valid data is present on
the secondary Address/Data bus. During a write, it indicates the
target is ready to accept the data.
SECONDARY PCI BUS STOP indicates a request to stop the
current transaction on the secondary PCI bus.
22 Data Sheet