User's Manual

Smart Machine Smart Decision

SIM5320_Hardware Design_V1.01 2011-11-10

4.7 K

47K

Turn on/ off impulse

POWER_ ON

Power

on / off logic

200K

1.8V

MODULE

Figure 15: Power on Timing Sequence

Table 5: Power on timing

Parameter Description Time value Unit

Ton The time to pull POWER_ON down to power on 64< Ton<180 ms

TpD+ The time to indicate connecting with the network >5.5 s

Tpw+

The time to indicate the module is powered on

completely

>4.5 s

Tuart The time to enable UART >4.7 s

Tusb The time to enable USB >9 s