User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 Pad Assignment
- 2.1.2 Signal Properties
- 2.1.3 USB Interface
- 2.1.4 Serial Interface ASC0
- 2.1.5 Serial Interface ASC1
- 2.1.6 UICC/SIM/USIM Interface
- 2.1.7 Digital Audio Interface
- 2.1.8 Pulse Code Modulation Interface (PCM)
- 2.1.9 Inter IC Sound Interface (I2S)
- 2.1.10 GPIO Interface
- 2.1.11 I2C Interface
- 2.1.12 SPI Interface
- 2.1.13 Pulse Counter
- 2.1.14 HSIC Interface (ELS51-VA Only)
- 2.1.15 SDIO Interface (ELS51-VA Only)
- 2.1.16 Control Signals
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 2.1 Application Interface
- 3 Operating Characteristics
- 3.1 Operating Modes
- 3.2 Power Up/Power Down Scenarios
- 3.3 Power Saving
- 3.4 Power Supply
- 3.5 Operating Temperatures
- 3.6 Electrostatic Discharge
- 3.7 Blocking against RF on Interface Lines
- 3.8 Reliability Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
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ELS31-VA/ELS51-VA Hardware Interface Description
2.1 Application Interface
56
ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 34 of 106
2.1.10 GPIO Interface
ELS31-VA/ELS51-VA offers a GPIO interface with 17 GPIO and 3 GPO lines. The lines are
shared with other interfaces or functions: Fast shutdown (see Section 2.1.16.4), status LED
(see Section 2.1.16.1), a pulse counter (see Section 2.1.13), ASC0 (see Section 2.1.4), ASC1
(see Section 2.1.5), SPI (see Section 2.1.12), HSIC (see Section 2.1.14), and digital audio in-
terface (DAI; see Section 2.1.7).
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.
Notes:
• GPO5, GPO23 and GPO26 are GPOs only.
Table 7: GPIO lines and possible alternative assignment
GPIO Fast
Shutdown
Status
LED
Pulse
Counter
ASC0 ASC1 SPI HSIC PCM
GPIO1 DTR0
GPIO2 DCD0
GPIO3 DSR0
GPIO4 FST_SHDN
GPO5 LED
GPIO6
GPIO7
GPIO8 COUNTER
GPIO16 RXD1 AP_WAKEUP
GPIO17 TXD1 HOST_ACTIVE
GPIO18 RTS1 CP_WAKEUP
GPIO19 CTS1 SUSPEND
GPIO20 PCM_I2S_OUT
GPIO21 PCM_I2S_IN
GPIO22 PCM_I2S_FSC
GPO23 PCM_I2S_CLK
GPIO24 RING0
GPIO25
GPO26 SPI_CS1
GPIO27 SPI_CS2