Fujitsu F2MC-16LX Hardware Manual page 344

CHAPTER 14 USB Mini-HOST
[bit 0] CSTAT: Connected state
It is whether the device is connected is shown. The terminal for Mini HOST becomes an object. It is not
initialized with the RST bit in the UDC control register (UDCC).
328
CSTAT
0 Device cut off
1 Device connect
Operation mode