Multi-Tech Systems MT5600SMI-P34 ユーザーズマニュアル
Chapter 3 – Electrical Characteristics
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide
16
Parallel Host Bus Timing
Parallel Host Bus Timing Table
Symbol
Parameter
Min
Max
Units
READ (See Notes)
t
AS
Address Setup
5
-
ns
t
AH
Address Hold
10
-
ns
t
CS
Chip Select Setup
0
-
ns
t
CH
Chip Select Hold
10
-
ns
t
RD
RD Strobe Width
45
-
ns
t
DD
Read Data Delay
-
25
ns
t
DRH
Read Data Hold
5
-
ns
WRITE (See Notes)
t
AS
Address Setup
5
-
ns
t
AH
Address Hold
15
-
ns
t
CS
Chip Select Setup
0
-
ns
t
CH
Chip Select Hold
10
-
ns
t
WT
WT Strobe Width
75
-
ns
t
DS
Write Data Setup (see Note 4)
-
20
ns
t
DWH
Write Data Hold (see Note 5)
5
-
ns
Notes:
1. When the host executes consecutive Rx FIFO reads, a minimum delay of 2 times the internal CPU
clock cycle plus 15 ns (85.86 ns at 28.224 MHz) is required from the falling edge of RD to the falling
edge of the next Host Rx FIFO RD clock.
edge of the next Host Rx FIFO RD clock.
2. When the host executes consecutive Tx FIFO writes, a minimum delay of 2 times the internal CPU
clock cycle plus 15 ns (85.86 ns at 28.224 MHz) is required from the falling edge of WT to the
falling edge of the next Host Tx FIFO WT clock.
falling edge of the next Host Tx FIFO WT clock.
3.
t
RD'
t
WT
= t
CYC
+ 15 ns.
4
.
t
DS is measured from the point at which both CS and WT are active.
5
.
t
DWH is measured from the point at which either CS and WT become active.
6. Clock Frequency = 28.224 MHz clock.