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authortmk <hasu@tmk-kbd.com>2015-05-14 15:38:15 +0900
committertmk <hasu@tmk-kbd.com>2015-05-19 00:39:43 +0900
commit9a2282157fbdf57ef0a50d4fea7da72505906588 (patch)
tree38bceaf7a84dcdb9678155e845520b4f5494c559 /converter/ibm4704_usb/ibm4704.txt
parent6014d1014e96a7b484699d4dd8c04292c0233b0e (diff)
ibm4704_usb: Fix interrupt of clock(rising edge)
Diffstat (limited to 'converter/ibm4704_usb/ibm4704.txt')
-rw-r--r--converter/ibm4704_usb/ibm4704.txt6
1 files changed, 3 insertions, 3 deletions
diff --git a/converter/ibm4704_usb/ibm4704.txt b/converter/ibm4704_usb/ibm4704.txt
index 9c4895d922..50d8c98b08 100644
--- a/converter/ibm4704_usb/ibm4704.txt
+++ b/converter/ibm4704_usb/ibm4704.txt
@@ -57,15 +57,15 @@ Keyboard to Host
----------------
Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part.
- ____ __ __ __ __ __ __ __ __ __ ________
- Clock \____/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
+ ____ __ __ __ __ __ __ __ __ __ _______
+ Clock \_____/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
____ ____ ____ ____ ____ ____ ____ ____ ____ ____
Data ____/ X____X____X____X____X____X____X____X____X____X________
Start 0 1 2 3 4 5 6 7 P Stop
Start bit: can be long as 300-350us.
Inhibit: Pull Data line down to inhibit keyboard to send.
-Timing: Host reads bit while Clock is hi.
+Timing: Host reads bit while Clock is hi.(rising edge)
Stop bit: Keyboard pulls down Data line to lo after 9th clock.