Arbitrary LPC (low pin count) traffic
-------------------------------------------------------------------------------
-These captures are the identification and programming with random data of a LPC
-(low pin count) interface flash chip. The LPC bus is emulated with an ARM
-Cortex-M microcontroller, and does not run at the standard 33MHz clock. Although
-the clock contains significant jitter, the connected chips respond and
-communicate as expected.
+These captures are the identification and programming with random data of an
+LPC (low pin count) interface flash chip. The LPC bus is emulated with an ARM
+Cortex-M microcontroller, and does not run at the standard 33MHz clock.
+Although the clock contains significant jitter, the connected chips respond
+and communicate as expected.
Details:
http://en.wikipedia.org/wiki/Low_Pin_Count
http://www.intel.com/design/chipsets/industry/25128901.pdf
-Hardware Setup
+Hardware setup
--------------
-A VultureProg daughterboard was attached to a TI Stellaris Launcphad board. A
-SST49LF080A flash chip was installed in the PLCC socket. The core clock of the
-CPU was reduced from 80MHz to 16MHz to permit the logic analyzer to capture all
-details of the waveform.
+A VultureProg daughterboard was attached to a TI Stellaris Launchpad board.
+An SST49LF080A flash chip was installed in the PLCC socket. The core clock of
+the CPU was reduced from 80MHz to 16MHz to permit the logic analyzer to
+capture all details of the waveform. The logic analyzer used was connected to
+the "LPC probe" header of the VultureProg daughterboard.
Hardware: http://github.com/mrnuke/vultureprog-hardware
Firmware + SW: http://git.qiprog.org/
-The logic analyzer used was a MCU123 USBee AX Pro clone. It was connected to the
-"LPC probe" header of the VultureProg daughterboard. All captures were run at
-24MHz sampling rate.
-
-Hookup
-------
-P0: LAD0
-P1: LAD1
-P2: LAD2
-P3: LAD3
-P4: LCLK
-P5: #LFRAME
-P6: NC
-P7: NC
+The logic analyzer used was an MCU123 USBee AX Pro clone (at 24MHz):
+
+ Probe LPC
+ ----------
+ 0 LAD0
+ 1 LAD1
+ 2 LAD2
+ 3 LAD3
+ 4 LCLK
+ 5 LFRAME#
+
Data
----
-- lpc_vultureprog.sr
- VultureProg BIOS chip programmer programming random data to a SST49LF080A.
+lpc_vultureprog.sr:
+
+ VultureProg BIOS chip programmer programming random data to an SST49LF080A.
The bus clock was intentionally reduced to allow capture with an FX2-based
logic analyzer.
+The sigrok command line used was:
+
+ sigrok-cli --driver fx2lafw --config samplerate=24mhz --samples 23552000 \
+ -o <filename>
+
This data is released into the public domain.
+