WED7PxxxCFA80xxC25
White Electronic Designs
AC CHARACTERISTICS (cont'd):
I/O Input (Read) Timing Specification
Item
Symbol
td(IORD)
IEEE Symbol
tIGLQV
Min ns.
Max ns.
100
Data Delay after IORD
Data Hold following IORD
IORD Width Time
Address Setup before IORD
Address Hold following IORD
CE Setup before IORD
CE Hold following IORD
REG Setup before IORD
REG Hold following IORD
INPACK Delay Falling from IORD
INPACK Delay Rising from IORD
IOIS16 Delay Falling from Address
IOIS16 Delay Rising from Address
Wait Delay Falling from IORD
Data Delay from Wait Rising
Wait Width Time
th(IORD)
tw(IORD)
tsuA(IORD)
thA(IORD)
tIGHQX
tIGLIGH
tAVIGL
tIGHAX
tELIGL
0
165
70
20
5
20
5
0
tsuCE(IORD)
thCE(IORD)
tsuREG(IORD)
thREG(IORD)
tdfINPACK(IORD)
tdrINPACK(IORD)
tdfIOIS16(ADR)
tdrIOIS16(ADR)
tdWT(IORD)
td(WT)
tIGHEH
tRGLIGL
tIGHRGH
tIGLIAL
tIGHIAH
tAVISL
0
45
45
35
35
35
0
tAVISH
tIGLWTL
tWTHQV
tWTLWTH
tw(WT)
350 (3000 for CF+)
Note: Maximum load on WAIT#, INPACK# and I0IS16# is 1 LSTTL with 50pF total load. All times are in nanoseconds. Minimum time from WAIT# high to IORD# high is Onsec,
but minimum IORD# width must still be met. Dout signifies data provided by the CompactFlash Storage Card or CF+ Card to the system. Wait Width time meets PCMCIA
specification of 12ps but is intentionally less in this spec.
I/O Output (Write) Timing Specification
Item
Symbol
tsu(IOWR)
th(IOWR)
tw(IOWR)
tsuA(IOWR)
thA(IOWR)
tsuCE(IOWR)
thCE(IOWR)
tsuREG(IOWR)
thREG(IOWR)
tdfIOIS16(ADR)
tdrIOIS16(ADR)
tdWT(IOWR)
tdrIOWR(WT)
tw(WT)
IEEE Symbol
tDVIWH
Min ns.
Max ns.
Data Setup before IOWR
Data Hold following IOWR
IOWR Width Time
60
30
165
70
20
5
20
5
0
tIWHDX
tIWLIWH
tAVIWL
tIWHAX
tELIWL
Address Setup before IOWR
Address Hold following IOWR
CE Setup before IOWR
CE Hold following IOWR
REG Setup before IOWR
REG Hold following IOWR
IOIS16 Delay Falling from Address
IOIS16 Delay Rising from Address
Wait Delay Falling from IOWR
IOWR high from Wait high
Wait Width Time
tIWHEH
tRGLIWL
tIWHRGH
tAVISL
35
35
35
tAVISH
tIWLWTL
tWTJIWH
tWTLWTH
0
350 (3000for CF+)
Note: The maximum load on WAIT#, INPACK#, and I0IS16# is 1 LSTTL with 50pF total load. All times are in nanoseconds. Minimum time from WAIT# high to IOWR# high is Onsec,
but minimum IOWR# width must still be met. Din signifies data provided by the system to the CompactFlash Storage Card or CF+ Card. The Wait Width time meets the PCMCIA
specification of 12ps but is intentionally less in this specification.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
July 2005
Rev. 1
7
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
