Quectel RM502Q-GL - PCM Interface

5G Module Series
RM502Q-GL Hardware Design
RM502Q-GL_Hardware_Design 46 / 83
The following figure and table are PCIe turn-on timing and variables of the module.
T
FCPO#-CLKREQ#
> 90 ms
PCIE_CLKREQ_N
PCIE_RST_N
PCIE_REFCLK
T
power-on
T
turn-on
VCC
FCPO#
Module power-on or insertion detection
RESET#
RFFE_VIO_1V8
System turn-on and booting
V
IH
≥ 1.19 V
1.8 V
3.7 V
1.8 V
T
FCPO#-PERST#
> 100 ms
T
PERST#-CLK
> 100 us
T
VCC-RST#
Figure 21: PCIe Power-up Timing of the Module
Table 18: PCIe Turn-on Timing of the Module
4.4. PCM Interface
The module supports audio communication via Pulse Code Modulation (PCM) digital interface. The PCM
interface supports the following modes:
Symbol
Min.
Typ.
Max.
Comment
T
power-on
0 ms
20 ms
-
Module power-on time depending on the host.
T
VCC-RST#
-
33 ms
-
Time period between module power-on and
RESET# being driven HIGH.
T
turn-on
68 ms
-
-
Module system turn on time.
tFCPO#-CLKREQ#
90 ms
100 ms
-
PCIe clock request.
tFCPO#-PERST
100 ms
-
-
PCIe reset.
T
PERST#-CLK
100 μs
-
-
The time period during which REFCLK is stable
before PERST# is inactive.