Updated usb regs (markdown)

diff --git a/usb-regs.md b/usb-regs.md
index e79c74c863c1b9869b9307cf62a255f9b7e97bb3..1886c81f02e3b23b62c1554c474c6c688fab69d9 100644 (file)
--- a/usb-regs.md
+++ b/usb-regs.md
@@ -180,7 +180,7 @@ If we have 0x3e, 0x3f and 0x5e, 0x5f, why do we need this register?
     size of data in fifo buffer? never used?
 
 # 0xBF ZM_EP4_BYTE_COUNT_LOW_OFFSET
-    size of data in fifo buffer
+    size of data in fifo buffer. Maximum size of EP4 should be 64 Bytes. If reported value is bigger, then buffer is defiantly corrupt.
 
 # 0xF8 ZM_EP3_DATA_OFFSET
 32bit data.