Siemens ASIC SIM 1-2, Руководство по эксплуатации функций

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Functional Description of the SIM 1-2
SIM 1-2
C79000-G8976-C215-01
15
Continued
No. Name
I/O
* 1)
A/D
* 2)
Description
16 TxS I D Transmit signal, input
17 RESETXN O D Reset output for external logic supplied by VREG
18 PDWNXN O D Power down – Prewarning signal for external
logic supplied by VREG
19 TD Must be connected to GND.
20 T0 Must be connected to GND.
21 S2 O D Switch output 2 of DC/DC converter, open drain
22 GND P D Ground
23 S1 O D Switch output 1 of DC/DC converter, open drain
24 t1 Must be connected to GND.
25 T2 Must be connected to GND.
26 VCM I D Voltage converter mode – enabling of DC/DC
converter
27 GIM I D Galvanic isolation mode – enabling of power-
saving interface
28 GND P D Ground
29 PROG P D Must be connected to VCCD.
30 VCCD P D Regulated supply voltage (5 V) for digital circuit
31 XT1 I/O D Quartz or resonator connector, with external
clock supply XT1 used as input
32 XT0 I/O D Quartz or resonator connector, with external
clock supply XT0 is connected to GND
33 VCCA P A Regulated supply voltage (5 V) for analog circuit
34 GND P A Ground
35 TA Must be connected to GND.
36 VM O A Middle voltage reference (derived from VCCA)
37 RDCDC I A Reference for startup current of the DC/DC
converter
38 RXIN I A Input of receiver filter
39 GND P A Ground
40 VBUS P A
Connector for supplying the ASIC with the
rectified bus voltage
41 GND P A/D Chassis, metal surface below the housing
* 1) I = input, O = output, P = power
* 2) A = analog, D = digital