Revision 1.02 – June 27, 2006
S5935 – PCI Product
Data Book
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.
Input is a standard input-only signal.
in
Totem Pole Output is a standard active driver.
out
Tri-State ® is a bidirectional, tristate input/output pin.
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 pullup is required to sustain the
s/t/s inactive state until another agent drives it, and must be provided by the central source.
Open Drain allows multiple devices to share as a wire-OR.
o/d
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 7. S5935 Signal Pins
S5935
PCLK
INTA#
RST#
BPCLK
IRQ#
Add-On Bus
Control
SYSRST
AD[31:0]
DQ[31:0]
Add-On Data Bus
C/BE[3:0]#
SELECT#
ADR[6:2]
BE[3:0]#
RD#
S5933
Register
Access
REQ#
GNT#
FRAME#
DEVSEL#
IRDY#
WR#
PTATN#
PTBURST#
PTNUM[1:0]
PTBE[3:0]#
PTADR#
TRDY#
IDSEL
Pass-Thru
Control/
Access
STOP#
LOCK#
PTWR
PTRDY#
PAR#
PERR#
SERR#
RDFIFO#
WRFIFO#
RDEMPTY
WRFULL
Direct
FIFO
Access
EA[15:0]
EQ[7:0]
Byte Wide
Config/BIOS Opt.
MODE
RSVD
SNV
S5935
Control
EWR#/SDA
ERD#/SCL
Serial
Config/BIOS Opt.
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DS1527
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AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
