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XT65/XT75 Hardware Interface Overview
6.5 Pin Assignment and Signal Description
Table 17: Signal description
Function
Signal name
SIM
CCIN
interface
specified
for use
with 1.8V
CCRST
SIM card
CCIO
CCCLK
CCVCC
CCGND
2
I
C inter-
I2CCLK
face
_SPICLK
I2CDAT_SPIDO
XT65_XT75_HO_v00.130
Confidential / Preliminary
IO
Signal form and level
I
R
≈
100kΩ
I
V
max = 0.6V at I = -25µA
IL
V
min = 2.1V at I = -10µA
IH
V
max = 3.05V
O
O
R
≈
47Ω
O
V
max = 0.25V at I = +1mA
OL
V
min = 1.45V at I = -0.5mA
OH
V
max = 1.90V
OH
I/O
R
≈
4.7kΩ
I
V
max = 0.45V
IL
V
min = 1.35V
IH
V
max = CCVCCmin + 0.3V =
IH
2.00V
R
≈
100Ω
O
V
max = 0.3V at I = +1mA
OL
V
min = 1.45V at I = -0.5mA
OH
V
max = 1.90V
OH
O
R
≈
100Ω
O
V
max = 0.3V at I = +1mA
OL
V
min = 1.45V at I = -0.5mA
OH
V
max = 1.90V
OH
O
V
min = 1.70V,
O
V
typ = 1.80V
O
V
max = 1.90V
O
I
max = -20mA
O
Ground
O
V
max = 0.2V at I = 2mA
OL
V
min = 2.55V at I = -0.5mA
OH
V
max = 3.05V
OH
I/O
V
max = 0.2V at I = 2mA
OL
V
max = 0.8V
IL
V
min = 2.15V
IH
V
max = VEXTmin + 0.3V = 3.05V
IH
Page 38 of 67
s
Comment
CCIN = Low, SIM card holder
closed
Maximum cable length or copper
track 100mm to SIM card holder.
All signals of SIM interface are
protected against ESD with a spe-
cial diode array.
Usage of CCGND is mandatory.
2
I
C interface is only available if the
two pins are not used as SPI inter-
face.
I2CDAT is configured as Open
Drain and needs a pull-up resistor
in the host application.
2
According to the I
C Bus Specifi-
cation Version 2.1 for the fast
mode a rise time of max. 300ns is
permitted. There is also a maxi-
mum VOL=0.4V at 3mA specified.
The value of the pull-up depends
on the capacitive load of the whole
2
system (I
C Slave + lines). The
maximum sink current of I2CDAT
and I2CCLK is 4mA.
If lines are unused keep pins open.
2006-10-12
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