Specifications

Cinterion
®
EHS6-A Hardware Interface Overview
2.1 Application Interface
22
 EHS6-A_HIO_v04.000 2019-03-05
Confidential / Preliminary
Page 16 of 40
2.1.7 GPIO Interface
EHS6-A offers a GPIO interface with 22 GPIO lines. The GPIO lines are shared with other in-
terfaces or functions: Fast shutdown (see Section 2.1.14), status LED (see Section 2.1.13), the
PWM functionality (see Section 2.1.11), an pulse counter (see Section 2.1.12), ASC0 (see Sec-
tion 2.1.2), ASC1 (see Section 2.1.3), an SPI interface (see Section 2.1.9), an HSIC interface
(see Section 2.1.10) and a PCM interface (see Section 2.1.11)
The following table shows the configuration variants for the GPIO pads. All variants are mutu-
ally exclusive, i.e. a pad configured for instance as Status LED is locked for alternative usage.
After startup, the above mentioned alternative GPIO line assignments can be configured using
AT commands (see [1]). The configuration is non-volatile and available after module restart.
Table 2: GPIO lines and possible alternative assignment
GPIO Fast
Shutdown
Status
LED
PWM Pulse
Counter
ASC0 ASC1 SPI HSIC PCM
GPIO1 DTR0
GPIO2 DCD0
GPIO3 DSR0 SPI_CLK
GPIO4 FST_SHDN
GPIO5 Status
LED
GPIO6 PWM2
GPIO7 PWM1
GPIO8 COUNTER
GPIO11
GPIO12
GPIO13
GPIO14
GPIO15
GPIO16 RXD1 MOSI AP_WAKEUP
GPIO17 TXD1 MISO HOST_ACTIVE
GPIO18 RTS1 CP_WAKEUP
GPIO19 CTS1 SPI_CS SUSPEND
GPIO20 TXDDAI
GPIO21 RXDDAI
GPIO22 TFSDAI
GPIO23 SCLK
GPIO24 RING0