Specifications

Wireless CPU
®
Q24 Series
Interfaces
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prior written agreement.
WM_PGM_Q24NG_PTS_001-005 November 20, 2007
Pin description
Signal Pin I/O I/O type Reset state Description
SIM_CLK 3 O 2V9/1V8 0V SIM Clock
SIM 5 O 2V9/1V8 0V SIM Reset _RST
SIM_DATA 7 I/O 2V9/1V8 0V SIM Data
SIM_VCC 9 O 2V9/1V8 0V SIM Power Supply
SIM_PRES 50 I 2V8 High SIM Card Detect
impedance
Caution:
Disturbances (digital noise, ESD) in the SIM signals may interrupt the Wireless CPU
®
functionality, a good lay
• Ground separation betwee d others signals
• ESD protections
(Refer to Wireless CPU
®
Q24 Series Customer Design Guidelines [6])
Electrical characteristics
out of these signals are recommended:
n SIM signals an
Parameters Conditions Min Type Max Unit
SIM_DATA VIH
IIH = ± 20 µA
0.7xSIMVCC V
SIM_DATA VIL IIL = 1 mA 0.3xSIMVCC V
SIM_RST,
SIM_CLK VOH
Source current = 20
µA
0.9xSIMVCC V
SIM_DATA
Source current = 20
µA
0.8xSIMVCC V
SIM_RST,
SIM_DATA,
SIM_CLK VOL
Sink current = -200
µA
0.4 V
SIMVCC = 2.9V 2.84 2.90 2.96 V
SIM_VCC Output
Voltage
SIMVCC = 1.8V 1.77 1.8 1.86 V
SIM_CLK Rise/Fall
Time
Loaded with 30 pF 20 ns
SIM_RST, Rise/Fall
Time
Loaded with 30 pF 20 ns
SIM_DATA, Rise/Fall
Time
Loaded with 30 pF 0.7 µs
SIM_CLK Frequency 3.25 MHz
Note for SIM_PRES connection:
• When not used, SIM_PRES must be tied to 2V8
• When used, a low to high transition means that the SIM Card is inserted and a