Documentation tweaks

Author: bit2shift

README.md

@@ -1,6 +1,6 @@
 # Serial Flasher Protocol Specification v1 for Arduino Due
 This implementation ~~uses~~ used software SPI (bit banging).  
-It uses hardware SPI through the ICSP header, since commit 2f98c47.
+It uses hardware SPI (`C̅S̅ → pin 52`) through the ICSP header since commit 2f98c47.
 
 ### Why bit banging?
 I needed to flash my laptop's BIOS and the Arduino Due was the only one I had running at 3.3V.  

serprog-due/serprog-due.ino

@@ -1,8 +1,8 @@
 /*
- * Serprog for Arduino Due using hardware SPI
+ * Serprog for Arduino Due using hardware SPI (CS on pin 52 by default, see below)
  * Use a Pomona SOIC-8 clip to program a soldered serial flash
  *
- * SOP8 clip pinout
+ * SOP8 clip pinout (Winbond 25Q64FV)
  * 1 -- /CS     (CS)
  * 2 -- DO      (MISO)
  * 3 -- /WP     (pull-up)
@@ -31,7 +31,7 @@
  * 0x14 (Set SPI frequency)
  */
 
-//Change serial port and CS pin number accordingly
+//Change serial port and CS pin if using a different Arduino
 serprog sp(SerialUSB, 52);
 
 void setup()