Texas Instruments AM335 Series Technical Reference Manual

CONTROL_MODULE Registers www.ti.com
9.3.23 usb_ctrl1 Register (offset = 628h) [reset = 0h]
usb_ctrl1 is shown in Figure 9-26 and described in Table 9-33.
Figure 9-26. usb_ctrl1 Register
31 30 29 28 27 26 25 24
Reserved
R/W-3Ch
23 22 21 20 19 18 17 16
datapolarity_inv Reserved Reserved otgsessenden otgvdet_en dmgpio_pd dpgpio_pd Reserved
R/W-0h R-0h R-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h
15 14 13 12 11 10 9 8
Reserved gpio_sig_cross gpio_sig_inv gpiomode Reserved cdet_extctl dppullup dmpullup
R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h
7 6 5 4 3 2 1 0
chgvsrc_en chgisink_en sinkondp srcondm chgdet_rstrt chgdet_dis otg_pwrdn cm_pwrdn
R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 9-33. usb_ctrl1 Register Field Descriptions
Bit Field Type Reset Description
31-24 Reserved R/W 3Ch Reserved. Any writes to this register must keep these bits set to
0x3C.
23 datapolarity_inv R/W 0h Data Polarity Invert:
0: DP/DM (normal polarity matching port definition)
1: DM/DP (inverted polarity of port definition)
22 Reserved R 0h
21 Reserved R 0h
20 otgsessenden R/W 0h Session End Detect Enable
0: Disable Session End Comparator
1: Turns on Session End Comparator
19 otgvdet_en R/W 0h VBUS Detect Enable
0: Disable VBUS Detect Enable
1: Turns on all comparators except Session End comparator
18 dmgpio_pd R/W 0h Pulldown on DM in GPIO Mode
0: Enables pulldown
1: Disables pulldown
17 dpgpio_pd R/W 0h Pulldown on DP in GPIO Mode
0: Enables pulldown
1: Disables pulldown
16 Reserved R/W 0h
15 Reserved R/W 0h
14 gpio_sig_cross R/W 0h UART TX -> DM
UART RX -> DP
13 gpio_sig_inv R/W 0h UART TX -> INV -> DP
UART RX -> INV -> DM
12 gpiomode R/W 0h GPIO Mode
0: USB Mode
1: GPIO Mode (UART)
11 Reserved R/W 0h
10 cdet_extctl R/W 0h Bypass the charger detection state machine
0: Charger detection on
1: Charger detection is bypassed
9 dppullup R/W 0h Pullup on DP line
0: No effect
1: Enable pullup on DP line
786
Control Module SPRUH73H–October 2011–Revised April 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated

Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English