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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/install/x200_external.md | 52 |
1 files changed, 19 insertions, 33 deletions
diff --git a/docs/install/x200_external.md b/docs/install/x200_external.md index c7330ce9..327d8b88 100644 --- a/docs/install/x200_external.md +++ b/docs/install/x200_external.md @@ -36,38 +36,24 @@ Initial BBB configuration Refer to [bbb\_setup.md](bbb_setup.md) for how to set up the BBB for flashing. -The following shows how to connect the clip to the BBB (on the P9 -header), for SOIC-16 (clip: Pomona 5252): - - POMONA 5252 (correlate with the BBB guide) - === front (display) on your X200 ==== - NC - - 21 - 1 - - 17 - NC - - NC - NC - - NC - NC - - NC - NC - - NC - 18 - - 3.3V (PSU) - 22 - - NC - this is pin 1 on the flash chip - === back (palmrest) on your X200 === - This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack. - Here is a photo of the SOIC-16 flash chip. Pins are labelled: - -The following shows how to connect the clip to the BBB (on the P9 -header), for SOIC-8 (clip: Pomona 5250): - - POMONA 5250 (correlate with the BBB guide) - === left side of the X200 (where the VGA port is) ==== - 18 - - 1 - 22 - - NC - NC - - 21 - 3.3V (PSU) - - 17 - this is pin 1 on the flash chip. in front of it is the screen. - === right side of the X200 (where the audio jacks are) === - This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack. - Here is a photo of the SOIC-8 flash chip. The pins are labelled: - - Look at the pads in that photo, on the left and right. Those are for SOIC-16. Would it be possible to remove the SOIC-8 and solder a SOIC-16 - chip on those pins? +The following table shows how to connect the test clip to the BBB (on the P9 +header), for SOIC-8/SOIC-16: + +|BeagleBoneBlack|Pin on P9|SPI |25xx SOIC8 pin|SOIC16|Ball |DTS | +|---------------|---------|----|--------------|------|--------|---------| +|I2C1_SCL |17 |/CS |1 |7 |A16 |spi0_cs0 | +|I2C1_SDA |18 |MOSI|5 |15 |B16 |spi0_d1 | +|UART2_RXD |22 |CLK |6 |16 |A17 |spi0_sclk| +|UART2_TXD |21 |MISO|2 |8 |B17 |spi0_d0 | +|GND |1 or 2 |GND |4 |10 |GND |GND | +|VDD_3V3D |3 or 4 |Vcc |8 |2 |VDD_3V3D|VDD_3V3D | + +*Pictures of flash chip location are located further down on this page* + +If onboard 3.3V supply happens to be insuficient, use a separate +module/power supply and set its current limit to 400mA. +Do not forget that in this case ground has to be continuous across between +motherboard, BBB and PSU (all three)! On the X200S and X200 Tablet the flash chip is underneath the board, in a WSON package. The pinout is very much the same as a SOIC-8, but such package makes @@ -125,7 +111,7 @@ source code which can be built. Log in as root on your BBB, using the instructions in [bbb\_setup.html\#bbb\_access](bbb_setup.html#bbb_access). -Test that flashrom works: +Probe for chips with flashrom: # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 |