Publication No. HRMCR11 Rev. B.0
About This Manual 63
' LTC1643
L
-
I
CGN (Linear Tec
lu
1ologies
)
b
_
TPS2034D (Texas Ins
t
rnment
s
)
Supply voltage range
The following ranges are defined by the CPCI specification PI C
M
G 2.0 Rev
3.0.
The voltages have to be measured at the CR! I board
(
for example at the
CPCI cow1ector pins at the solder side):
Supply
+5 V
+3.3V
+12V
Table 36: Supply voltage range
Voltage and tolerance
5
.
0 V
+
5 %/-3 %
3.3V+5%
/
-
3%
1
2
.
0 V+/- 5 %
Note:
The PCI specification d3
.
3 V with a margin of±0
.
3 V for all PCI add
on cards
.
This specification is valid too for PMC modules used on the CR! I
.
Please note that some PMC mezzanine modules may not function when the
CR! I supply voltage is close to the lower margin of +3.3 V -3 % (PI CMG 2
.
0)
.
GPIO 0 ... 7
This general purpose I/0 pins can be used as
i
nputs
,
with following si
gn
al
levels
:
Table 37: GPIO input voltages
Signal
l
eve
l
low
-
0.5 V ... +0.8 V
high
+2
.
0 V
.
.
.
+
5
.
5 V
When used as outputs, the following si
gn
al levels are supplied:
low
Table 38: GPIO output voltages
Signal
l
eve
l
at current
-
0
.4 V at 6 nl.A sinking
+2.4 V at 3 nl.A sourcu1g
Electrical clearance
The CR 11 is designed to meet the parameters as listed below.
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