Fujitsu MB90335 Series Hardware Manual page 280

MB90335 Series
[bit 9, bit 8] HS: Handshake status
It indicates the status of handshake operations between transmission and reception in host mode. It
indicates NULL when handshake operation is not performed due to any reasons such as an error and the
SOF token is completed. It is updated when transmission or reception has been completed. To update
them, you must set the RST bit in the UDC control register (UDCC) to "0".
Table 12.4-1 Handshake
bit9
CM44-10137-6E
HS
bit8
0 0
0 1
1 0
1 1
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 12 USB HOST
12.4 Register of USB HOST
Handshake
ACK
NAK
STALL
NULL
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