Hardware
Copyright IXXAT Automation GmbH
169
IEM Manual, 1.5
7.3
Electrical specification
7.3.1 Power supply
Symbol
Item
Min.
Typ.
Max.
Unit
I
IN
Current consumption
-
330
-
mA
Vcc
Supply voltage (DC)
3.15
3.30
3.45
V
Maximum ripple (AC)
-
-
± 100 pp
mV
Figure 7-14: Power supply
7.3.2 I/O
– 3.3V LVTTL
I/O
V
CCIO
(V)
V
IL
(V)
V
IH
(V)
V
OL
(V)
V
OH
(V)
I
OL
(mA)
I
OH
(mA)
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
Max.
Min.
3.3V LVTTL
3.15
3.3
3.45
-
0.8
1.7
3.6
0.45
2.4
4
-4
Figure 7-15: I/O
7.3.3 Timings for memory mapped access (MCI)
7.3.3.1 Timings on accessing parallel interface
T
sysclk
= 13,3ns
75MHz system clock
T
setup
= 13,3ns
max. time frame required for setup
T
output
= 13,3ns
max. time frame for data output
T
setup host
setup time for the host CPU must be obtained from
the manufacturers data sheet
7.3.3.2 Data read access
The timing for data read access has to be set to the worst case access, thus:
T
access_Read
= T
setup
+ 4 * T
sysclk
+ T
Output
+ T
Setup Host
This results in:
T
access
= 13,3ns + 4 * 13,3ns + 13,3ns + T
Setup Host
= 80ns + T
Setup Host
7.3.3.3 Data write access
In general, data write access can be executed faster than data read access.
The worst case will be two T
sysclk
. Thus the access time results in:
T
access_write
= 3 * T
sysclk
= 40ns