MC68HC908LD64 Datasheet, PDF (200/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Module (USB)
14.6.4 USB SIE Timing Status Register (SIETSR)
Address: $0057
Bit 7
6
5
4
3
2
1
Bit 0
Read: RSTF
0
LOCKF
0
0
0
0
0
Write:
RSTFR
LOCKFR SOFFR EOF2FR EOPFR TRANFR
Reset: 0*
0
0
0
0
0
0
0
= Unimplemented
* RSTF is reset by a power-on reset (POR) only.
Figure 14-6. USB SIE Timing Status Register (SIETSR)
RSTF — USB Reset Flag
This read-only bit is set when a valid USB reset signal state is
detected on the D0+ and D0– lines. This bit is cleared by writing a
logic 1 to the RSTFR bit or by a MCU power-on reset.
1 = USB reset signal detected on D0+ and D0–
0 = No USB reset detected
RSTFR — Clear Reset Flag Bit
Writing a logic 1 to this write-only bit will clear the RSTF bit if it is set.
Reset clears this bit.
1 = Write 1 to clear the RSTF bit
0 = No effect
LOCKF — USB Frame Timer Locked
This read-only bit is set when the internal frame timer is locked to the
host timer. This bit is cleared by writing a logic 1 to the LOCKFR bit.
Reset clears this bit.
1 = Internal frame timer is locked to the host timer
0 = Internal frame timer is not locked to the host timer
LOCKFR — Clear Frame Timer Locked Flag
Writing a logic 1 to this write-only bit will clear the LOCKF bit if it is set.
Reset clears this bit.
1 = Write 1 to clear the LOCKF bit
0 = No effect
Data Sheet
200
Universal Serial Bus Module (USB)
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor