Difference between revisions of "Embedded Open Modular Architecture/CompactFlash"

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= EOMA/CF =
 
= EOMA/CF =
  
page under development.
+
page under development.  this standard is virtually identical to EOMA/PCMCIA except that the 24-pin RGB/TTL has been replaced by single-channel LVDS, leaving 2 pins spare which have presently been allocated to provide extra 5V power.
 +
 
 +
the disadvantage of single-channel LVDS is that it is not sufficient to drive resolutions above 1280x1024 @ 75hz (24-bit) but if a lower refresh rate (40hz, 30hz) is acceptable, and/or a lower bitrate (18-bit) then it is possible to drive 1920x1080 at about 60hz for 18-bit or 47hz for 24-bit.
 +
 
 +
this standard is primarily designed for ultra-low-cost systems as well as those where space is at a premium.  because of this, specifying MIPI as the LCD standard would be inappropriate, whereas many SoCs now have single-channel or in some case dual-channel LVDS available as standard.  even in cases where the SoC does not have LVDS, a low-cost RGB/TTL to LVDS IC is available such as the [TI SN75LVDS83b](http://www.ti.com/product/sn75lvds83).
  
 
= Pinouts =
 
= Pinouts =

Revision as of 14:22, 30 December 2011

EOMA/CF

page under development. this standard is virtually identical to EOMA/PCMCIA except that the 24-pin RGB/TTL has been replaced by single-channel LVDS, leaving 2 pins spare which have presently been allocated to provide extra 5V power.

the disadvantage of single-channel LVDS is that it is not sufficient to drive resolutions above 1280x1024 @ 75hz (24-bit) but if a lower refresh rate (40hz, 30hz) is acceptable, and/or a lower bitrate (18-bit) then it is possible to drive 1920x1080 at about 60hz for 18-bit or 47hz for 24-bit.

this standard is primarily designed for ultra-low-cost systems as well as those where space is at a premium. because of this, specifying MIPI as the LCD standard would be inappropriate, whereas many SoCs now have single-channel or in some case dual-channel LVDS available as standard. even in cases where the SoC does not have LVDS, a low-cost RGB/TTL to LVDS IC is available such as the [TI SN75LVDS83b](http://www.ti.com/product/sn75lvds83).

Pinouts

  • 1 RIN 0- Negative LVDS differential data input
  • 26 RIN 0+ Positive LVDS differential data input
  • 2 RIN 1- Negative LVDS differential data input
  • 27 RIN 1+ Positive LVDS differential data input
  • 3 RIN 2- Negative LVDS differential data input
  • 28 RIN 2+ Positive LVDS differential data input
  • 4 CLKIN- Negative LVDS differential clock input
  • 29 CLKIN+ Positive LVDS differential clock input
  • 5 GND
  • 30 GND
  • 6 10/100 Ethernet (TX+)
  • 31 10/100 Ethernet (TX-)
  • 7 10/100 Ethernet (RX+)
  • 32 10/100 Ethernet (RX-)
  • 8 GROUND
  • 33 GROUND
  • 9 USB2 (Data+)
  • 34 USB2 (Data-)
  • 10 GROUND
  • 35 GROUND
  • 11 I2C Clock (SCL)
  • 36 I2C Data (SDA)
  • 12 PWR (5.0V)
  • 37 PWR (5.0v)
  • 13 PWR (5.0V)
  • 38 PWR (5.0v)
  • 14 GPIO (0)
  • 39 GPIO (1)
  • 15 GPIO (2)
  • 40 GPIO (3)
  • 16 GPIO (4)
  • 41 GPIO (5)
  • 17 GPIO (6)
  • 42 GPIO (7)
  • 18 GPIO (8)
  • 43 GPIO (9)
  • 19 GPIO (10)
  • 44 GPIO (11)
  • 20 GPIO (12)
  • 45 GPIO (13)
  • 21 GPIO (14)
  • 46 GPIO (15)
  • 22 GROUND
  • 47 GROUND
  • 23 SATA-II Transmit (A+)
  • 48 SATA-II Transmit (A-)
  • 24 GROUND
  • 49 GROUND
  • 25 SATA-II Receive (B+)
  • 50 SATA-II Receive (B-)