US Robotics USR3500 Dokumentacja Pobierz pdf (Strona 18)

Rev 1.0 1/27/14 18

Reference Guide

Interfaces

Figure 7. Equivalent Circuit of V

, Vref = 2.8V

Figure 8. Equivalent Circuit of V

, Vref = 2.8V

Figure 9. Equivalent Circuit of V

, Vref = 2.8V

With Vref > 2.8V, both GPIO35 and GPIO25 may be interfaced with a component

that complies with the following levels.

Table 5. GPIO Pin Operating Conditions when Vref > 2.8V

Parameter

Min

Typ

Max

Condition

0.84V

Please refer to Figure 10.

1.96V

Please refer to Figure 11.

058.0

110

Vref

Please refer to Figure 12.

Vref*

modem Zout = 100K Pull-up to Vref, please

refer to Figure 13.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 62 63

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US Robotics USR3500 Dokumentacja Strona 18