Difference between revisions of "Embedded Open Modular Architecture/EOMA-26"
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+ | = EOMA-26 Specification = | ||
+ | |||
+ | This page describes the specification of EOMA-26. The number of pins on the interface is 26; the physical form-factor is the 34x75x5mm ExpressCard format. | ||
+ | |||
+ | Re-purposing of the ExpressCard interface and form-factor has been chosen to create portable mass-volume (100 million units and above) ultra-low-cost Embedded Computing Modules (Computer on Module). | ||
+ | |||
+ | The interfaces are: | ||
+ | * 3-channel LVDS (covering up to approximately 1280x800 @ 18-bit colour) | ||
+ | * I2C | ||
+ | * USB (Low Speed, Full Speed, and optionally Hi Speed/480 Mbit/s) | ||
+ | * RS232 UART (Tx and Rx only) | ||
+ | * 4-pin SD/MMC (which must automatically support 2-pin, 1-pin and SPI mode) | ||
+ | * 2 dedicated pins of General-purpose Digital I/O (GPIO) with a mandatory 5 further multiplexed GPIO (covering UART and SD/MMC) | ||
+ | |||
+ | These interfaces are '''NOT OPTIONAL''' for CPU Cards. All CPU Cards '''MUST''' provide '''all''' interfaces. I/O Boards on the other hand are free to implement whichever interfaces are required for the device. The only exception is I2C (due to the EOMA-68 identification EEPROM), which '''MUST''' be provided by all I/O Boards | ||
+ | |||
+ | Exactly like ExpressCard Cards, EOMA-26 CPU Cards may have absolutely any functions, any additional connectors, peripherals and so on ''without'' limitation, except for compliance with the EOMA-26 pinouts and physical size constraints. These additional functions, which may include access ports in the casework, may extend outwards from the user-facing end of the CPU Card to any practical extent, exactly as with ExpressCard. | ||
+ | |||
+ | = Target Market for EOMA-26 = | ||
+ | |||
+ | The target market for EOMA-68 is smaller or lower-cost devices than EOMA-68. Tablets and Laptops up to 11in in size in particular would ideally make use of EOMA-26. In essence, the EOMA-26 form-factor was designed to take advantage of the decreasing cost and increasingly-high specification of lower-end SoCs such as the A10S, AM3359 [http://www.ti.com/product/am3359] and so on. | ||
+ | |||
=== Table of EOMA-26 pinouts === | === Table of EOMA-26 pinouts === | ||
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Revision as of 13:53, 29 June 2013
EOMA-26 Specification
This page describes the specification of EOMA-26. The number of pins on the interface is 26; the physical form-factor is the 34x75x5mm ExpressCard format.
Re-purposing of the ExpressCard interface and form-factor has been chosen to create portable mass-volume (100 million units and above) ultra-low-cost Embedded Computing Modules (Computer on Module).
The interfaces are:
- 3-channel LVDS (covering up to approximately 1280x800 @ 18-bit colour)
- I2C
- USB (Low Speed, Full Speed, and optionally Hi Speed/480 Mbit/s)
- RS232 UART (Tx and Rx only)
- 4-pin SD/MMC (which must automatically support 2-pin, 1-pin and SPI mode)
- 2 dedicated pins of General-purpose Digital I/O (GPIO) with a mandatory 5 further multiplexed GPIO (covering UART and SD/MMC)
These interfaces are NOT OPTIONAL for CPU Cards. All CPU Cards MUST provide all interfaces. I/O Boards on the other hand are free to implement whichever interfaces are required for the device. The only exception is I2C (due to the EOMA-68 identification EEPROM), which MUST be provided by all I/O Boards
Exactly like ExpressCard Cards, EOMA-26 CPU Cards may have absolutely any functions, any additional connectors, peripherals and so on without limitation, except for compliance with the EOMA-26 pinouts and physical size constraints. These additional functions, which may include access ports in the casework, may extend outwards from the user-facing end of the CPU Card to any practical extent, exactly as with ExpressCard.
Target Market for EOMA-26
The target market for EOMA-68 is smaller or lower-cost devices than EOMA-68. Tablets and Laptops up to 11in in size in particular would ideally make use of EOMA-26. In essence, the EOMA-26 form-factor was designed to take advantage of the decreasing cost and increasingly-high specification of lower-end SoCs such as the A10S, AM3359 [1] and so on.
Table of EOMA-26 pinouts
Row 1 | Row 2 |
---|---|
* 1 GROUND | * 14 RIN 0- Negative LVDS differential data output |
* 2 USB2 (Data-) | * 15 RIN 1+ Positive LVDS differential data output |
* 3 USB2 (Data+) | * 16 RIN 1- Negative LVDS differential data output |
* 4 PWR (5.0V) | * 17 RIN 2+ Positive LVDS differential data output |
* 5 GPIO2 / UART_TX | * 18 RIN 2- Negative LVDS differential data output |
* 6 GPIO3 / UART_RX | * 19 PWR (5.0V) |
* 7 I2C Clock (SCL) | * 20 SDC-CMD |
* 8 I2C Data (SDA) | * 21 SDC-CLK |
* 9 GPIO0 | * 22 GPIO4 / SDC-3 |
* 10 GPIO1 | * 23 GPIO5 / SDC-2 |
* 11 CLKIN+ Positive LVDS differential clock output | * 24 GPIO6 / SDC-1 |
* 12 CLKIN- Negative LVDS differential clock output | * 25 SDC-0 |
* 13 RIN 0+ Positive LVDS differential data output | * 26 GND |