SimTech SIMCom SIM5360-PCIE Series, Проектирование аппаратного обеспечения

Страница: 19 / 35

Smart Machine Smart Decision
SIM5360-PCIE_Hardware_Design
19
2015-01-22
Note: PCM interface can be control by AT command. For more details please refer to document [1] and
document [2]
Table 10: PCM DC Characteristics
Symbol Parameter Min Type Max Unit
V
IH
High-level input voltage 1.26 1.8 2.1 V
V
IL
Low-level input voltage -0.3 0 0.63 V
V
OH
High-level output voltage 1.35 1.8 1.8 V
V
OL
Low-level output voltage 0 0 0.45 V
4.6. PERST#
The PERST# pin could be used as an emergency reset. SIM5360-PCIE has power-up reset function, so
power-up reset pulse is not necessary. When the PERST# pin is pulled to ground, the module will be reset. The
PERST# pin is already pulled up in module, so the external pull-up resistor is not necessary.
The following table is the electrical characteristics of The PERST# pin.
Table 11: PERST# Electrical Characteristic
Symbol Parameter Min Type Max Unit
V
IH
High-level input voltage 1.7 1.8 3.6 V
V
IL
Low-level input voltage - - 0.3 V
T
high-hold
After power up AND-NOT
operation time(keep high
level or keep open) 250 - - ms
T
low-hold
Reset low level hold on time 300 - - us
The low level pulse time must is longer than 300us
，
The following figure is the timing of reset function.
Figure 5: Reset Timing
Data Ordering MSB