
S5335 – PCI Bus Controller, 3.3V
Revision 5.01 – November 30, 2005
Data Sheet
AMCC Confidential and Proprietary
DS1657 19
Signal Type Definition
The following signal type definitions [in, out, t/s, s/t/s and o/d] are taken from Revision 2.1 of the PCI local bus
specification.
Note that a # symbol at the end of a signal name denotes that the active state occurs when the signal is at a low voltage. When no # symbol is
present, the signal is active high.
Figure 6. S5335 Signal Pins
in
Input is a standard input-only signal.
out
Totem Pole Output is a standard active driver.
t/s
Tri-State is a bidirectional, tristate input/output pin.
s/t/s
Sustained Tri-State is an active low tristate signal owned and driven by one and only one agent at a time. The agent
that drives an s/t/s pin low must drive it high for at least one clock before letting it float. A new agent cannot start driv-
ing a s/t/s signal any sooner than one clock after the previous owner tri-states it. A pull-up is required to sustain the
inactive state until another agent drives it, and must be provided by the central source.
o/d
Open Drain allows multiple devices to share as a wire-OR.
PCLK
INTA#
RST#
AD[31:0]
C/BE[3:0]#
REQ#
GNT#
FRAME#
DEVSEL#
IRDY#
TRDY#
IDSEL
STOP#
LOCK#
PAR#
PERR#
SERR#
MODE
RSVD
SNV
BPCLK
IRQ#
SYSRST
DQ[31:0]
SELECT#
ADR[6:2]
BE[3:0]#
RD#
WR#
PTATN#
PTBURST#
PTNUM[1:0]
PTBE[3:0]#
PTADR#
PTWR
PTRDY#
RDFIFO#
WRFIFO#
RDEMPTY
WRFULL
EA[15:0]
EQ[7:0]
EWR#/SDA
ERD#/SCL
Add-On Bus
Control
S5335
Register
Access
Pass-Thru
Control/
Access
Serial
Config/BIOS
Opt.
Direct
FIFO
Access
Byte Wide
Config/BIOS
Opt.
P
S5335
Control
S5335
Add-On Data
Bus