Hardware Interface Description - Wireless Data Modules
Hardware Interface Description - Wireless Data Modules
Hardware Interface Description - Wireless Data Modules
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MC55/56 <strong>Hardware</strong> <strong>Interface</strong> <strong>Description</strong><br />
Confidential / Released<br />
s<br />
Function Signal name IO Signal form and level Comments<br />
SIM interface<br />
CCIN I R I ≈ 100kΩ<br />
V IL max = 0.5V<br />
V IH min = 2.15V at I = 20µA,<br />
V IH max=3.3V at I = 30µA<br />
CCRST O R O ≈47Ω<br />
V OL max = 0.25V at I = 1mA<br />
V OH min = 2.3V at I = -1mA<br />
V OH max = 2.73V<br />
CCIO I/O R I ≈10kΩ<br />
V IL max = 0.5V<br />
V IH min = 1.95V, V IH max=3.3V<br />
R O ≈220Ω<br />
V OL max = 0.4V at I = 1mA<br />
V OH min = 2.15V at I = -1mA<br />
V OH min = 2.55V at I = -20µA<br />
V OH max = 2.96V<br />
CCCLK O R O ≈220Ω<br />
V OL max = 0.4V at I = 1mA<br />
V OH min = 2.15V at I = -1mA<br />
V OH max = 2.73V<br />
CCVCC O R O max = 5Ω<br />
CCVCCmin = 2.84V,<br />
CCVCCmax = 2.96V<br />
Imax = -20mA<br />
CCGND<br />
Ground<br />
CCIN = high, SIM card<br />
holder closed (no card<br />
recognition)<br />
Maximum cable length<br />
200mm to SIM card holder.<br />
All signals of SIM interface<br />
are protected against ESD<br />
with a special diode array.<br />
Usage of CCGND is<br />
mandatory.<br />
ASC0<br />
interface<br />
/RXD0<br />
/TXD0<br />
/CTS0<br />
/RTS0<br />
/DTR0<br />
/DCD0<br />
/DSR0<br />
O<br />
I<br />
O<br />
I<br />
I<br />
O<br />
O<br />
V OL max = 0.2V at I = 1mA<br />
V OH min = 2.35V at I = -1mA<br />
V OH max = 2.73V<br />
V IL max = 0.5V<br />
V IH min = 1.95V, V IH max=3.3V<br />
/DTR0, RTS0: Imax = -90µA at V IN = 0V<br />
/TXD0: Imax = -30µA at V IN = 0V<br />
First serial interface for AT<br />
commands or data stream.<br />
To avoid floating if output<br />
pins are high-impedance,<br />
use pull-up resistors tied to<br />
VDD or pull-down resistors<br />
tied to GND. See Chapter<br />
3.3.2.1.<br />
If unused keep pins open.<br />
/RING0<br />
O<br />
ASC1<br />
interface<br />
/RXD1<br />
/TXD1<br />
/CTS1<br />
/RTS1<br />
O<br />
I<br />
O<br />
I<br />
V OL max = 0.2V at I = 1mA<br />
V OH min = 2.35V at I = -1mA<br />
V OH max = 2.73V<br />
V IL max = 0.5V<br />
V IH min = 1.95V, V IH max=3.3V<br />
I I max = -90µA at V IN = 0V<br />
Second serial interface for<br />
AT commands.<br />
To avoid floating if output<br />
pins are high-impedance,<br />
use pull-up resistors tied to<br />
VDD or pull-down resistors<br />
tied to GND. See Chapter<br />
3.3.2.1.<br />
If unused keep pins open.<br />
Digital audio<br />
interface<br />
RFSDAI<br />
RXDDAI<br />
SCLK<br />
I<br />
I<br />
I<br />
V OL max = 0.2V at I = 1mA<br />
V OH min = 2.35V at I = -1mA<br />
V OH max = 2.73V<br />
If unused keep pins open.<br />
TFSDAI<br />
TXDDAI<br />
O<br />
O<br />
V IL max = 0.5V<br />
V IH min = 1.95V, V IH max=3.3V<br />
I I max = 330µA at V IN = 3.3V<br />
MC55/56_hd_v02.06 Page 78 of 105 29.10.2004