Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 System description Page 11 of 119
Function Pin Name Pin No I/O Description Remarks
TXD 12 I UART data input 1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT commands, data communication, FOAT.
Internal pull-down to GND on “00” and R410M-02B versions
Internal pull-up to V_INT on other product versions
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
CTS 11 O UART clear to send
output
1.8 V output, Circuit 106 (CTS) in ITU-T V.24.
Not supported by ‘00’, ‘01’ and R410M-02B-00 versions.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
RTS 10 I UART ready to send
input
1.8 V input, Circuit 105 (RTS) in ITU-T V.24.
Internal active pull-up to V_INT.
Not supported by ‘00’, ‘01’ and R410M-02B-00 versions.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DSR 6 O UART data set ready
output
1.8 V, Circuit 107 in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
RI 7 O UART ring indicator
output
1.8 V, Circuit 125 in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DTR 9 I UART data terminal
ready input
1.8 V, Circuit 108/2 in ITU-T V.24.
Internal active pull-up to V_INT.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DCD 8 O UART data carrier
detect output
1.8 V, Circuit 109 in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
USB VUSB_DET 17 I USB detect input VBUS (5 V typical) USB supply generated by the host must be connected
to this input pin to enable the USB interface.
Test-Point for diagnostic / FW update strongly recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
USB_D- 28 I/O USB Data Line D- USB interface for AT commands, data communication, FOAT, FW
update by u-blox tool, diagnostics.
90 Ω nominal differential impedance (Z
0
)
30 Ω nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors as required
by the USB 2.0 specifications [4] are part of the USB pin driver and need
not be provided externally.
Test-Point for diagnostic / FW update strongly recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
USB_D+ 29 I/O USB Data Line D+ USB interface for AT commands, data communication, FOAT, FW
update by u-blox tool, diagnostics.
90 Ω nominal differential impedance (Z
0
)
30 Ω nominal common mode impedance (Z
CM
)
Pull-up or pull-down resistors and external series resistors as required
by the USB 2.0 specifications [4] are part of the USB pin driver and need
not be provided externally.
Test-Point for diagnostic / FW update strongly recommended.
See section 1.9.2 for functional description.
See section 2.6.2 for external circuit design-in.
SPI I2S_WA /
SPI_MOSI
34 O SPI MOSI SPI Master Output Slave Input, alternatively configurable as I
2
S word
alignment
Not supported by “00”, “01” and “x2” product versions.
See section 1.9.3 for functional description.
See section 2.6.3 for external circuit design-in.