User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 33
3.8.8
Mini PCIe
On the MBa8Xx a Mini PCIe card slot is available.
The interface is wired with all signals, which the standard provides (e.g. USB, I²C, and PCIe).
The hardware thus supports any standard-compliant Mini-PCIE card.
TQMa8Xx
Mini PCIe
Latch
(J1)
PCIe
I2C1
Mini PCIe
Slot
(X24)
USB Hub
USB_DN1
Clock
Generator
SIM card
Socket
(X25)
Figure 16: Block diagram Mini PCIe
To use the Mini PCIe interface, the two voltage regulators for the voltages V_1V5_MPCIE and V_3V3_MPCIE must be activated
first. Thus, the power sequencing requirements of the Mini PCIe standard can be met. Two GPIO signals of the TQMa8Xx are used
for this. The following table shows the used signals.
Table 35:
Reset- and Interrupt signals of Ethernet-Transceiver
Voltage
MBa8Xx signal
TQMa8Xx signal
TQMa8Xx pin
Remark
V_1V5_MPCIE
V_1V5_MPCIE_EN
GPIO0_IO30
X1-24
High-active / pulled-down to GND
V_3V3_MPCIE
V_3V3_MPCIE_EN
GPIO0_IO31
X1-26
High-active / pulled-down to GND
An additional SIM card holder for GSM cards is provided (for further information see chapter 3.8.9).
Media type:
Mini-PCI Express (cards with size 50.95 mm x 30 mm)
Interface TQMa8Xx:
PCIe
Compatibility:
PCI Express Base Specification, Revision 4.0, Version 0.7
PCI Express
®
Mini Card Electromechanical Specification Revision 2.1
Transfer rate:
Up to 8 Gbps (max. theoretical value according to Spec.)
ESD protection:
Not available on the MBa8Xx
Table 36:
V_1V5_MPCIE, V_3V3_MPCIE at Mini PCIe (X24)
Voltage
Parameter
Min.
Typ.
Max.
Remark
V_3V3_MPCIE
Output voltage
3.2 V
3.3 V
3.35 V
–
Output current
–
–
1.1 A
Max. 0.5 A per pin at X24
V_1V5_MPCIE
Output voltage
1.44 V
1.5 V
1.53 V
–
Output current
–
–
375 mA
–
