K60P100M100SF2RM Datasheet, PDF (1294/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Functional Description
• Updates the STATUS register to reflect the error with SEQ_RES = 00. (See Table
46-18 for field values.)
• Sets the CONTROL[IF] bit.
• Generates an interrupt if enabled (the CONTROL[IE] bit is set).
Note that in this case the module does not wait for the T_{VDPSRC_CON} interval to elapse.
At this point, control has been passed to system software via the interrupt. The rest of the
sequence (detecting the type of charging port) is not applicable, so software should:
1. Read the STATUS register.
2. Set the CONTROL[IACK] bit to acknowledge the interrupt.
3. Set the CONTROL[SR] bit to issue a software reset to the module.
4. Disable the module.
46.5.1.5 Charger Type Detection
After software enables the D+ pullup resistor, the module is notified automatically (via
internal signaling; the module waits until the ipp_pue_pullup_dp input goes high) to start
the CHECK_DM timer counting down the time interval programmed into the
TIMER2[CHECK_DM] field.
Once the CHECK_DM time has elapsed, the module samples the USB D- line to
determine the type of charger. See the following table.
Table 46-17. Sampling D- in the Charger Type Detection Phase
If the voltage on D- is...
High
Low
Then...
The port is a dedicated charging port.¹
The port is a charging host port.²
See...
Dedicated
Charging Port
Charging Host
Port
1. In a dedicated charger, the D+ and D- lines are shorted together through a small resistor.
2. In a charging host port, the D+ and D- lines are not shorted.
46.5.1.5.1 Dedicated Charging Port
For a dedicated charger, the module does the following:
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K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.