mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1012

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Functional Description
Note that the T
value so it will not rollover to zero and start counting up again.
40.5.2 Interrupts and Events
The USBDCD module has an interrupt to alert system software of certain events, which
are listed in the following table. All events except the Phase Complete event for the Data
Pin Detection phase can trigger an interrupt.
1. See the description of the Status Register for register information.
2. The SEQ_STAT and SEQ_RES fields retain the values held at the time of the timeout error.
40.5.2.1 Interrupt Handling
Software can read which event caused the interrupt from the STATUS register during the
interrupt service routine.
1012
Data Pin
Detection
Charging Port
Detection
Charger Type
Detection
Sequence
Timeout
Sequence
Phase
Table 40-18. Events Triggering an Interrupt by Sequence Phase
Phase
Complete
Phase
Complete
Error
Phase
Complete
Error
Event
UNITCON
The module has detected data pin contact.
No interrupt occurs: CONTROL[IF] = 0.
The module has completed the process of
identifying if the USB port is a charging port or
not.
The module cannot identify the type of port
because the D- line is above the USB's VLGC
threshold.
The module has completed the process of
identifying the charger type detection.
Note: The ERR flag always reads as zero
The timeout interval from the time the USB
device attaches to a USB port until it connects
has elapsed
Event Description
register field will stop incrementing when it reaches its maximum
MCF51JF128 Reference Manual, Rev. 2, 03/2011
because no known error conditions
are checked during this phase.
Preliminary
ERR = 0
SEQ_STAT = 01
SEQ_RES = 00
TO = 0
ERR = 0
SEQ_STAT = 10
SEQ_RES = 01 or 10
TO = 0
ERR = 1
SEQ_STAT = 10
SEQ_RES = 00
TO = 0
ERR = 0
SEQ_STAT = 11
SEQ_RES = 11 or 10
TO = 0
ERR = 1
SEQ_STAT = last value
SEQ_RES = last value
TO = 1
STATUS Fields
Freescale Semiconductor, Inc.
1
2
2
VBUS Contact
Detection
Charging Port
Detection
Error in Charging
Port Detection
Charger Type
Detection
Charger
Detection
Sequence
Timeout.
Phase
Description