Table of Contents
Advertisement
CHAPTER 30 USB Mini-host
Bit6-4
Bit3-0
Note:
The TGGL and ENDPT bits are ignored during the SOF token
794
Bit names
TKNEN
• These bits send a token corresponding to the setting.
Once the operation is completed, the value is "000", and
the HIRQ:CMPIRQ bit is set to "1" (HCNT0:CMPIRE bit
must also set for an interrupt to be generated).
• TKNEN bits are updated after the UDCC:RST bit is set to
"0" in host mode.
• If a token is issued again because a token interrupt is
generated, a tempo of three cycles or longer in terms of
USB transfer clock (12 MHz) is required before writing to
the TKNEN bits. Writing to the TKNEN bits will not run a
token in disconnection status (HSTATE:CSTAT = "0")
• The PRE packet is not supported.
• If the HSTATE:SOFBUSY bit is set, writing "100" to these
bits is forbidden.
ENDPT
• Those bits define the transmit and receive endpoint of the
device.
• The UDCC:RST bit must be set to "0" to enable the
register update
Function
Advertisement
Table of Contents
