PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 193

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

13.3.3 Microprocessor Interface Timing
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RC
WC
t
AR
AW
DH
DS
HZ
PS
RA
RCU
RD
RDH
RI
RVD
WA
WCU
WI
WO
WR
WRR
Symbol
a. Not tested. Guaranteed by design.
Valid Address to Read Active
Valid Address to Write Active
Data Hold
Data Setup
Read to Floating Data Bus
Port Setup
Address Hold from Inactive Read
Read Cycle Update
Read Strobe Width
Read Data Hold
Read Strobe to Clear FDC IRQ
Active Read to Valid Data
Address Hold from Inactive Write
Write Cycle Update
Write Strobe to Clear FDC IRQ
Write Data to Port Update
Write Strobe Width
Read Cycle = t
Write Cycle = t
RD low after WR high
TABLE 13-37. Microprocessor Interface Timing
Parameter
AW
AR
+ t
+ t
a
a
Device Description
RD
WR
a
+ t
+ t
RCU
a
WC
193
a
a
Min
123
123
18
18
18
13
10
45
60
10
45
60
80
0
0
0
Max
25
55
55
55
60
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
nsec
Unit
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