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LZT 123 1834 32
5.2 Dealing with Unused pins
Integrators applications may connect all of the GR64 signals pins, or just those
necessary for minimal operation, or most commonly some other permutation. If
GR64 signal pins are not connected to the host application you should terminate
them in the following manner.
Table 5.2-1 Unused Pin Termination
Pin Name Unused pin termination
1, 3, 5, 7, 9 VCC Must be connected
2, 4, 6, 8, 10, 12 GND Must be connected
11 CHG_IN Leave Open
13 ADIN4/GPIO5 Ground
14 ON/OFF Must be connected
15 SIMVCC Leave Open
16 SIMDET Leave Open
17 SIMRST Leave Open
18 SIMDAT Leave Open
19 SIMCLK Leave Open
20 DAC Leave Open
21 GPIO1 Connect to VREF
22 GPIO2 Connect to VREF
23 GPIO3 Connect to VREF
24 GPIO4 Connect to VREF
25 VRTC Leave Open
26 ADIN1 Ground
27 ADIN2 Ground
28 ADIN3 Ground
29 SDA Leave Open
30 SCL Leave Open
31 BUZZER Leave Open
32 DSR1/GPIO7 Connect to VREF
33 LED/GPIO6 Connect to VREF
34 VREF Must be connected
35 TX_ON Leave Open
36 RI/GPIO8 Connect to VREF
37 DTR1/GPIO10 Connect to VREF
38 DCD1/GPIO11 Connect to VREF
39 RTS1/GPIO9 Connect to VREF
40 CTS1/GPIO12 Connect to VREF
41 DTM1 Connect to VREF
42 DFM1 Leave Open