Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 USB Interface
- 2.1.2 Serial Interface ASC0
- 2.1.3 Serial Interface ASC1
- 2.1.4 UICC/SIM/USIM Interface
- 2.1.5 Analog Audio Interface
- 2.1.6 Digital Audio Interface
- 2.1.7 GPIO Interface
- 2.1.8 I2C Interface
- 2.1.9 SPI Interface
- 2.1.10 HSIC Interface
- 2.1.11 PWM Interfaces
- 2.1.12 Pulse Counter
- 2.1.13 Status LED
- 2.1.14 Fast Shutdown
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 2.1 Application Interface
- 3 Operating Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
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EHS6-A Hardware Interface Overview
2.1 Application Interface
22
EHS6-A_HIO_v04.000 2019-03-05
Confidential / Preliminary
Page 13 of 40
2.1.3 Serial Interface ASC1
Four EHS6-A GPIO lines can be configured as ASC1 interface signals to provide a 4-wire un-
balanced, asynchronous modem interface ASC1 conforming to ITU-T V.24 protocol DCE sig-
nalling. The electrical characteristics do not comply with ITU-T V.28. The significant levels are
0V (for low data bit or active state) and 1.8V (for high data bit or inactive state).
EHS6-A is designed for use as a DCE. Based on the conventions for DCE-DTE connections it
communicates with the customer application (DTE) using the following signals:
• Port TXD @ application sends data to module’s TXD1 signal line
• Port RXD @ application receives data from the module’s RXD1 signal line
Figure 4: Serial interface ASC1
Features
• Includes only the data lines TXD1 and RXD1 plus RTS1 and CTS1 for hardware hand-
shake.
• On ASC1 no RING line is available.
• Configured for 8 data bits, no parity and 1 or 2 stop bits.
• ASC1 can be operated at fixed bit rates from 300 bps to 921,600 bps.
• Autobauding supports bit rates from 300bps up to 230,400bps.
• Supports RTS1/CTS1 hardware flow. The hardware hand shake line RTS0 has an internal
pull down resistor causing a low level signal, if the line is not used and open. Although hard-
ware flow control is recommended, this allows communication by using only RXD and TXD
lines.