TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 14 of 164
Function Pin name
Pin No
I/O
Description
Remarks
SIM
VSIM
59
O
SIM supply output
VSIM = 1.8 V / 3 V output as per connected SIM type.
See section
for functional description.
See section
for external circuit design-in.
SIM_IO
57
I/O
SIM data
Data input/output for 1.8 V / 3 V SIM
Internal 4.7 k
pull-up to VSIM.
See section
for functional description.
See section
for external circuit design-in.
SIM_CLK
56
O
SIM clock
3.43 MHz clock output for 1.8 V / 3 V SIM
See section
for functional description.
See section
for external circuit design-in.
SIM_RST
58
O
SIM reset
Reset output for 1.8 V / 3 V SIM
See section
for functional description.
See section
for external circuit design-in.
USB
VUSB_DET
4
I
USB detect input
Leave unconnected: VUSB_DET functionality is not
supported.
See section
for functional description.
See section
for external circuit design-in.
USB_D-
27
I/O
USB Data Line D-
USB interface for AT and data communication, FOAT,
FW update by u-blox EasyFlash tool and diagnostic.
90
nominal differential impedance (Z
0
)
30
nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and series resistors as
required by USB 2.0 specifications
are part of the
USB pad driver and need not be provided externally.
If the USB interface is not used by the Application
Processor, Test-Point for diagnostic / FW update
access is recommended.
See section
for functional description.
See section
for external circuit design-in.
USB_D+
28
I/O
USB Data Line D+
USB interface for AT and data communication, FOAT,
FW update by u-blox EasyFlash tool and diagnostic.
90
nominal differential impedance (Z
0
)
30
nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and series resistors as
required by the USB 2.0 specifications
are part of the
USB pad driver and need not be provided externally.
If the USB interface is not used by the Application
Processor, Test-Point for diagnostic / FW update access
is recommended.
See section
for functional description.
See section
for external circuit design-in.
