mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1000

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

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Memory Map/Register Definition
40.4.6 USBDCD_TIMER2
TIMER2 contains timing parameters. Note that register values can be written that are not
compliant with the USB Battery Charging Specification v1.1, so care should be taken
when overwriting the default values.
Address: USBDCD_TIMER2 is FFFF_8680h base + 18h offset = FFFF_8698h
1000
Bit
TVDPSRC_CON
W
R
TVDPSRC_ON
CHECK_DM
Reserved
Reserved
31
0
31–26
25–16
15–4
Field
Field
9–0
3–0
30
0
29
0
0
28
0
Time Period Comparator Enabled
Sets the amount of time (in ms) that VDP_SRC, IDM_SINK, and the D-/VDAT_REF comparator are
enabled and connected to the D+/D- lines during the charging port detection phase of the sequence. Valid
values are 1-1023, but the USB Battery Charging Specification requires a minimum value of 40 ms.
This read-only bitfield is reserved and always has the value zero.
Time Period Before Enabling D+ Pullup
Sets the amount of time (in ms) that the module waits after charging port detection before system
software should enable the D+ pullup to connect to the USB host. Valid values are 1-1023, but the USB
Battery Charging Specification requires a minimum value of 40 ms.
This read-only bitfield is reserved and always has the value zero.
Time Before Check of D- Line
Sets the amount of time (in ms) that the module waits after the device connects to the USB bus (software
enables the D+ pullup) until checking the state of the D- line to determine the type of charging port. Valid
values are 1-15ms.
27
0
26
0
25
0
USBDCD_TIMER1 field descriptions (continued)
24
0
MCF51JF128 Reference Manual, Rev. 2, 03/2011
23
0
TVDPSRC_CON
USBDCD_TIMER2 field descriptions
22
0
21
1
20
0
19
1
18
0
Preliminary
17
0
16
0
15
0
Description
Description
14
0
13
0
12
0
11
0
10
0
0
0
9
0
8
Freescale Semiconductor, Inc.
0
7
0
6
0
5
4
0
0
3
CHECK_DM
0
2
0
1
1
0