blob: abab9534d15b034f6909192eed3ebdb6f0960418 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
-------------------------------------------------------------------------------
IBM POWER9 LPC (low pin count) traffic
-------------------------------------------------------------------------------
These captures are examples of various transaction types from an IBM POWER9 LPC
(low pin count) interface.
Details:
http://en.wikipedia.org/wiki/Low_Pin_Count
Hardware setup
--------------
The logic analyser used was a DreamSourceLab DSLogic U3Pro32. As support for
this is not yet in sigrok, the traces were captured externally and imported.
Probe LPC
----------
0 LAD0
1 LAD1
2 LAD2
3 LAD3
4 LFRAME#
5 LCLK
power9_lpc_io_read.sr
--------------
An I/O read from 0x3fd (serial port) which returns 0x60.
power9_lpc_io_write.sr
---------------
An I/O write to 0x3f8 (serial port) of 0x73.
power9_lpc_firmware_read.sr
--------------------
A firmware read from 0xfff7000 which returns 0x54524150.
power9_lpc_firmware_write.sr
---------------------
A firmware write to 0xc031360 of 0x0000.
power9_lpc_io_write_abort.sr
---------------------
An I/O read that gets aborted because the peripheral never responded.
|