Added yet more chipset info.

unsupported/microtek-scanmaker-5900.html

@@ -64,6 +64,13 @@ EliteMT
 M11L416256SA -35J 
 DZC2HCYG1 0235 
 
+U11 USB Transceiver
+Philips logo
+ISP1581BD
+C84252 07
+TSD2296
+http://www.semiconductors.philips.com/pip/ISP1581BD.html
+
 The rest are 74HC logic apart from one which is hidden under a metal shield.
 
 There are at least two other PCBs in the scanner head.
@@ -75,6 +82,11 @@ There are at least two other PCBs in the scanner head.
       backlight integrated into the lid, 4800x2400DPI CCD, 48 bit colour,
       USB2. It operates from it's own power pack rather than from the USB.
     </p>
+    <p>
+      The Canon D1250U2 <a
+      href="http://lists.alioth.debian.org/pipermail/sane-devel/2003-January/006028.html">seems
+      to use (at least) the same USB controller</a>.
+    </p>
     <h2>Output of /proc/bus/usb/devices or sane-find-scanner -v -v</h2>
     <pre>
 T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=480 MxCh= 0