upd72872 Renesas Electronics Corporation., upd72872 Datasheet - Page 10

• Manufacturer Part Number: upd72872
• Description: Ieee1394 1-chip Ohci Host Controller
• Manufacturer: Renesas Electronics Corporation.

1. PIN FUNCTIONS
1.1 PCI/Cardbus Interface Signals: (52 pins)
10
PAR
AD0-AD31
CBE0-CBE3
FRAME
TRDY
IRDY
REQ
GNT
IDSEL
DEVSEL
STOP
PME
Remark
Name
*: If the Link pin is pulled up, it should be connected to L_V
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
44
9, 10, 12, 13, 15-
18, 23, 24, 26-29,
32, 33, 47-50, 52,
53, 55, 56, 58, 59,
62, 63, 65-68
21, 34, 45, 57
35
37
36
8
7
22
39
40
3
Pin No.
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
PCI/Cardbus
I
OL
-
-
-
Data Sheet S14793EJ1V0DS
Volts(V)
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Parity is even parity across AD0-AD31 and CBE0-
CBE3. It is an input when AD0-AD31 is an input; it
is an output when AD0-AD31 is an output.
PCI Multiplexed Address and Data
Command/Byte Enables are multiplexed Bus
Commands & Byte enables.
Frame is asserted by the initiator to indicate the
cycle beginning and is kept asserted during the
burst cycle. If Cardbus mode (CARD_ON = 1), this
pin should be pulled up to V
Target Ready indicates that the current data phase
of the transaction is ready to be completed.
Initiator Ready indicates that the current bus
master is ready to complete the current data phase.
During a write, its assertion indicates that the
initiator is driving valid data onto the data bus.
During a read, its assertion indicates that the
initiator is ready to accept data from the currently-
addressed target.
Bus_master Request indicates to the bus arbiter
that this device wants to become a bus master.
Bus_master Grant indicates to this device that
access to the bus has been granted.
Initialization Device Select is used as chip select
for configuration read/write transaction during the
phase of device initialization. If Cardbus mode
(CARD_ON = 1), this pin should be pulled up to V
Device Select when actively driven, indicates that
the driving device has decoded its address as the
target of the current access.
PCI Stop when actively driven, indicates that the
target is requesting the current bus master to stop
the transaction.
PME Output for power management enable.
DD
.
Function
DD
.
DD
.
Block *
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