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