User's Manual l TQMa7x UM 0203 l © 2022, TQ-Systems GmbH
Page 30
3.2.5.14
QSPI
The optional NOR flash on the TQMa7x is connected to the Quad-SPI bus of the i.MX7.
To provide more memory on the carrier board as an alternative, the interface is also routed to connector X3.
The following table shows the signals used by the QSPI interface.
Table 33:
QSPI
Signal
Direction
Pin
Remark
Power domain
QSPI_DATA3
I/O
X2-118
–
VCC3V3_VLDO4
QSPI_DATA2
I/O
X2-116
–
QSPI_DATA1
I/O
X2-114
–
QSPI_DATA0
I/O
X2-112
–
QSPI_SS0#
O
X2-113
–
QSPI_SS1#
O
X2-115
–
QSPI_RESET#
O
X2-117
–
QSPI_SCLK
O
X2-109
22 Ω serial termination
Attention: Malfunction or destruction
The QSPI interface may only be used as memory interface. To connect SPI devices the eCSPI interfaces
should be used.
The QSPI interface should not be connected on the carrier board if QSPI NOR flash is assembled
on the TQMa7x, to avoid data transmission errors.
3.2.5.15
SAI
To connect an audio codec via e.g. I2S, the signals of the SAI1 are available from the three SAI interfaces on the TQMa7x
connectors. The following table shows the used signals of the SAI interface:
Table 34:
SAI interface
Signal
Direction
Pin
Power domain
SAI1_MCLK
O
X2-39
VCC3V3_V33
SAI1_RX_DATA
I
X2-38
SAI1_RX_BCLK
I
X2-40
SAI1_RX_SYNC
I
X2-42
SAI1_TX_DATA
O
X2-30
SAI1_TX_BCLK
O
X2-32
SAI1_TX_SYNC
O
X2-34
3.2.5.16
SIM
The i.MX7 provides two SIM interfaces according to ISO7816 standard. One of these interfaces is available at the TQMa7x
connectors to connect e.g. a smart card on the carrier board.
Depending on the type of card used, the supply voltage of 1.8 V, 3.3 V or 5 V has to be provided by the carrier board. Additional
level converters are required for this. The wiring of smart cards is defined by the ISO7816 standard.
The following table shows the signals used by the SIM interface.
Table 35:
SIM interface
Signal
Direction
Pin
Power domain
SIM_CLK
O
X2-73
VCC3V3_V33
SIM_PD
I
X2-71
SIM_SVEN
O
X2-69
SIM_RST#
O
X2-67
SIM_TRXD
I/O
X2-65
11:
Direction depends on Codec mode.
