Siemens XT65, Обзор аппаратуры, Страница: 38 / 58

XT65/XT75 Hardware Interface Overview
6.5 Pin Assignment and Signal Description
s
XT65_XT75_HO_v00.130 Page 38 of 67 2006-10-12
Confidential / Preliminary
SIM
interface
specified
for use
with 1.8V
SIM card
CCIN I R
I
≈ 100k Ω
V
IL
max = 0.6V at I = -25µA
V
IH
min = 2.1V at I = -10µA
V
O
max = 3.05V
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.
CCRST O R
O
≈ 47 Ω
V
OL
max = 0.25V at I = +1mA
V
OH
min = 1.45V at I = -0.5mA
V
OH
max = 1.90V
CCIO I/O R
I
≈ 4.7k Ω
V
IL
max = 0.45V
V
IH
min = 1.35V
V
IH
max = CC 0.3V =
2.00V
R
O
≈ 100 Ω
V
OL
max = 0.3V at I = +1mA
V
OH
min = 1.45V at I = -0.5mA
V
OH
max = 1.90V
CCCLK O R
O
≈ 100 Ω
V
OL
max = 0.3V at I = +1mA
V
OH
min = 1.45V at I = -0.5mA
V
OH
max = 1.90V
CCVCC O V
O
min = 1.70V,
V
O
typ = 1.80V
V
O
max = 1.90V
I
O
max = -20mA
CCGND Ground
I
2
C inter-
face
I2CCLK
_SPICLK
O V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
I
2
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.
According to the I
2
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
system (I
2
C Slave + lines). The
maximum sink current of I2CDAT
and I2CCLK is 4mA.
If lines are unused keep pins open.
I2CDAT_SPIDO I/O V
OL
max = 0.2V at I = 2mA
V
IL
max = 0.8V
V
IH
min = 2.15V
V
IH
max = V 0.3V = 3.05V
Table 17:
Signal description
Function Signal name IO Signal form and level Comment