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diff --git a/docs/pinmux.mdwn b/docs/pinmux.mdwn
index 1fa821cbdda8c505a447f9c0e858b684544305c2..0a6b4197163f5b854eba99773d9635d099989f13 100644 (file)
--- a/docs/pinmux.mdwn
+++ b/docs/pinmux.mdwn
@@ -490,16 +490,15 @@ The 32-bit on the other hand has four address rows, and so will take four write
 
 64-bit:
 
-* 0x00 - Configure GPIOs  0-7
-* 0x01 - Configure GPIOs  8-15
+* 0x00 - Configure GPIOs  0-7  - requires 8-bit `sel` one bit per GPIO
+* 0x01 - Configure GPIOs  8-15 - requires 8-bit `sel` one bit per GPIO
 
 32-bit:
 
-* 0x00 - Configure GPIOs  0-3
-* 0x01 - Configure GPIOs  4-7
-* 0x02 - Configure GPIOs  8-11
-* 0x03 - Configure GPIOs 12-15
-
+* 0x00 - Configure GPIOs  0-3 - requires 4-bit `sel` one bit per GPIO
+* 0x01 - Configure GPIOs  4-7 - requires 4-bit `sel` one bit per GPIO
+* 0x02 - Configure GPIOs  8-11 - requires 4-bit `sel` one bit per GPIO
+* 0x03 - Configure GPIOs 12-15 - requires 4-bit `sel` one bit per GPIO
 
 ## Combining JTAG BS Chain and Pinmux (In Progress)
 [[!img io_mux_bank_planning.JPG size="600x"]]