Revision 1.02 – April 12, 2007
S5920 – PCI Product: Electrical Characteristics
Data Book
Table 66. Mailbox Timings
Functional Operation Range (V = 5.0 V ± 5%, 0°C to 70°C, 50 pF load on outputs)
CC
Symbol
Parameter
Min
Max
Units
Notes
t
t
t
t
t
t
4
ns
LOAD# Setup to ADCLK Rising Edge
LOAD# Hold from ADCLK Rising Edge
MD[7:0] Setup to ADCLK Rising Edge
MD[7:0] Hold from ADCLK Rising Edge
MD[7:0] Float from LOAD# Low
60
61
62
63
64
65
1
ns
ns
ns
ns
ns
2.6
1
1
1
14.9
17
2
2,3
MD[7:0] Active from ADCLK Rising Edge
Notes:
1. Applies only when external mailbox is in input mode (MDMODE = 1).
2. Applies only when external mailbox is in input/output mode (MDMODE = 0).
3. When the S5920 is driving MD[7:0] w/ Add-On incoming mailbox byte 3, the PCI can update this output synchronously to the PCI clock. As a
result, once driving, this output is asynchronous to ADCLK.
Figure 91. Mailbox Data
ADCLK
t61
LOAD#
t60
t63
MD[7:0]
t62
Figure 92. Mailbox Data
ADCLK
t61
t60
LOAD#
MD[7:0]
t64
t62
t65
5920 Driving
5920 Driving
Add-On Driving
t63
AMCC Confidential and Proprietary
DS1596
160
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
