S5935TFC AMCC [Applied Micro Circuits Corporation], S5935TFC Datasheet - Page 158

• Manufacturer Part Number: S5935TFC
• Description: PCI Product
• Manufacturer: AMCC [Applied Micro Circuits Corporation]

S5935 – PCI Product
Figure 82. Single Cycle Pass-Thru Read with PTADR#
Figure 83. Pass-Thru Burst Write
Figure 5 also shows a 5 data phase Pass-Thru burst
write, but the Add-On logic uses PTRDY# to control
the rate at which data is transferred. In many applica-
tions, Add-On logic is not fast enough to accept data at
every BPCLK rising edge (every 30 ns in a 33 MHz
158
DS1527
PTNUM[1:0]
PTBURST#
PTBE[3:0]#
SELECT#
ADR[6:2]
DQ[31:0]
PTRDY#
PTADR#
PTATN#
BE[3:0]#
BPCLK
PTWR
WR#
012345
PT ADDR
Data stored in Pass-Thru
data register
2Ch
0h
0h
1
PCI system). In this example, the Add-On interface
accepts data every other clock. In the example, RD# is
asserted during the entire Add-On burst, but it can be
deasserted when PTRDY# is deasserted, the S5935
functions the same under both conditions.
PT DATA
PCI Read cycle completed
Revision 1.02 – June 27, 2006
AMCC Confidential and Proprietary
6
Data Book