Document No.: FT_000589
FT313H USB2.0 HS Host Controller Datasheet Version 1.1
Clearance No.: FTDI# 318
6.4 Timing
6.4.1 PIO timing
SRAM PIO timing characteristics (Ambient Temperature = -40°C to +85°C)
VCC(I/O)=1.8V VCC(I/O)=2.5V
VCC(I/O)=3.3V
Parameter
Description
Unit
Min
Max
Min
Max
Min
Max
CS_N setup time
before WR_N / RD_N
low
Tcs
0
-
0
-
0
-
ns
ns
ns
ns
ns
CS_N hold time after
WR_N / RD_N high
Tch
Tcp
0
-
-
-
0
-
-
-
0
-
-
-
CS_N pulse width for
read
40
40
40
40
40
40
CS_N pulse width for
write
address setup time
before WR_N / RD_N
low
Tasrw
0
0
-
-
0
0
-
-
0
0
-
-
Address Hold Time
after WR_N/RD_N
LOW
ns
ns
Tahrw
Tap
Address Latch Pulse
Width
Twc
Twp
Write Cycle Time
WR_N Pulse Width
80
40
-
-
79
40
-
-
78.5
40
-
-
ns
ns
ns
RD_N High to Output
Hi-Z
Tdh
4
0
6
8
9
-
-
-
4
0
6
7
7
-
-
-
4
0
6
6
6
-
-
-
WR_N High to Input
Hi-Z
ns
ns
ns
DATA Setup Time
before DATA Latch
Tdadvh
Toe
RD_N Low to DATA
Output Enable
Trp
Trc
RD_N Pulse Width
Read Cycle Time
40
80
-
-
40
-
-
40
79
-
-
ns
ns
79.5
Table 6-10 SRAM PIO timing
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46
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