K60P100M100SF2RM Datasheet, PDF (1251/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Field
4
DMLOW
3
Reserved
2
OTGEN
1–0
Reserved
Chapter 45 Universal Serial Bus OTG Controller (USBOTG)
USBx_OTGCTL field descriptions (continued)
0 D+ pulldown resistor is not enabled.
1 D+ pulldown resistor is enabled.
D- Data Line pull-down resistor enable
Description
0 D- pulldown resistor is not enabled.
1 D- pulldown resistor is enabled.
This read-only field is reserved and always has the value zero.
On-The-Go pullup/pulldown resistor enable
0 If USB_EN is set and HOST_MODE is clear in the Control Register (CTL), then the D+ Data Line pull-
up resistors are enabled. If HOST_MODE is set the D+ and D- Data Line pull-down resistors are
engaged.
1 The pull-up and pull-down controls in this register are used.
This read-only field is reserved and always has the value zero.
45.4.9 Interrupt Status Register (USBx_ISTAT)
The Interrupt Status Register contains bits for each of the interrupt sources within the
USB Module. Each of these bits are qualified with their respective interrupt enable bits.
All bits of this register are logically OR'd together along with the OTG Interrupt Status
Register (OTGSTAT) to form a single interrupt source for the processor's interrupt
controller. After an interrupt bit has been set it may only be cleared by writing a one to
the respective interrupt bit. This register contains the value of 0x00 after a reset.
Addresses: USB0_ISTAT is 4007_2000h base + 80h offset = 4007_2080h
Bit
Read
Write
Reset
7
STALL
w1c
0
6
ATTACH
w1c
0
5
RESUME
w1c
0
4
SLEEP
w1c
0
3
TOKDNE
w1c
0
2
SOFTOK
w1c
0
1
ERROR
w1c
0
0
USBRST
w1c
0
USBx_ISTAT field descriptions
Field
7
STALL
6
ATTACH
Stall Interrupt
Description
In Target mode this bit is asserted when a STALL handshake is sent by the SIE.
In Host mode this bit is set when the USB Module detects a STALL acknowledge during the handshake
phase of a USB transaction. This interrupt can be use to determine is the last USB transaction was
completed successfully or if it stalled.
Attach Interrupt
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1251