USB Registers
16.5.1.2 SYSCONFIG Register (offset = 10h) [reset = 28h]
SYSCONFIG is shown in
and described in
Figure 16-23. SYSCONFIG Register
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
USB0_OCP_EN_N
PHY0_UTMI_EN_N
USB1_OCP_EN_N
PHY1_UTMI_EN_N
R/W-0h
R/W-0h
R/W-0h
R/W-0h
7
6
5
4
3
2
1
0
Reserved
STANDBY_MODE
IDLEMODE
FREEEMU
SOFT_RESET
R/W-2h
R/W-2h
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 16-31. SYSCONFIG Register Field Descriptions
Bit
Field
Type
Reset
Description
11
USB0_OCP_EN_N
R/W
0h
Active low clock enable for usb0_ocp_clk
0 = enable
1 = disable
10
PHY0_UTMI_EN_N
R/W
0h
Active low clock enable for phy0_utmi_clk
0 = enable
1 = disable
9
USB1_OCP_EN_N
R/W
0h
Active low clock enable for usb1_ocp_clk
0 = enable
1 = disable
8
PHY1_UTMI_EN_N
R/W
0h
Active low clock enable for phy1_utmi_clk
0 = enable
1 = disable
5-4
STANDBY_MODE
R/W
2h
Configuration of the local initiator state management mode.
0 = force-standby mode.
1 = no-standby mode.
2 = smart-standby mode.
3 = Reserved.
3-2
IDLEMODE
R/W
2h
Configuration of the local target state management mode.
0 = force-idle mode.
1 = no-idle mode.
2 = smart-idle mode.
3 = smart-idle with wakeup.
1
FREEEMU
R/W
0h
Sensitivity to emulation (debug) suspend input signal.
0 = sensitive to emulation suspend
1 = NOT sensitive to emulation suspend
0
SOFT_RESET
R/W
0h
Software reset of USBSS, USB0, and USB1 modules
Write 0 = No action.
Write 1 = Initiate software reset.
Read 0 = Reset done, no action.
Read 1 = Reset ongoing.
1763
SPRUH73H – October 2011 – Revised April 2013
Universal Serial Bus (USB)
Copyright © 2011–2013, Texas Instruments Incorporated