User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 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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ELS31-/ELS51-US Hardware Interface Overview
2.1 Application Interface
29
ELS31-US_ELS51-US_HIO_v01.000a 2016-12-28
Confidential / Preliminary
Page 18 of 46
2.1.10 SDIO Interface (ELS51-US Only)
The Secure Digital Input Output (SDIO) interface can be used to for instance connect an SD
card. The SDIO interface has the following features:
Table 4 lists the six SDIO interface lines:
Table 3: SDIO interface features
Feature Description/Value
Interface Type SDIO/SD1 (1 data line), SDIO/SD4 (4 data lines), MMC4 (4 data lines)
Voltage 1.8 V
DMA Mode SDMA / ADMA1 / ADMA2
Number of SLOTs 1
Implement DDR mode Yes
Card inserted status Yes
SDIOCLK frequency Default Mode: 23 MHz maximum
High Speed Mode: 46 MHz maximum
UHS-I Mode: 92 MHz
Max block length 2048 bytes
SDIO interrupt support Yes, support SDIO/SD1, SDIO/SD4 mode interrupts
Table 4: SDIO interface lines
Signal Direction Description
SDIOCLK Out SD master clock output to SD/MMC/SDIO device.
SDIOCMD I/O Command line.
SDIO0 I/O Data lines. Only SDIO0 carries data in 1-bit SD mode,
SDIO0..3 carry data in 4-bits mode.
SDIO interrupt is multiplexed with SDIO1.
SDIO1 I/O
SDIO2 I/O
SDIO3 I/O