Preliminary
Registers
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Table 20-115. USB1 Auto Req Register (USB1AUTOREQ) Field Descriptions (continued)
Bit
Field
Value
Description
3-2
Rx(N+1)_autoreq
RX endpoint N+1 Auto Req enable
00
No auto req
01
Auto req on all but EOP
10
Reserved
11
Auto req always
1-0
Rx(N)_autoreq
RX endpoint N Auto Req enable
00
No auto req
01
Auto req on all but EOP
10
Reserved
11
Auto req always
20.9.2.2.18 USB1 SRP Fix Time Register (USB1SRPFIXTIME)
The USB1 SRP fix time register (USB1SRPFIXTIME) allows the CPU to configure the maximum
amount of time the SRP fix logic blocks the AVAID from the PHY to the OTG core. This time allows the
VBUS signal the ability to get below the thresholds and therefore remove the chance of voltage
bounces which could give false threshold measurements.
The USB1 SRP fix time register is shown in
and described in
Figure 20-104. USB1 SRP Fix Time Register (USB1SRPFIXTIME)
31
0
srpfixtime
R/W-0280de80h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-116. USB1 SRP Fix Time Register (USB1SRPFIXTIME) Field Descriptions
Bits
Field
Description
31-0
srpfixtime
SRP Fix maximum time in 60 MHz cycles. Default is 700 ms.
1914
Universal Serial Bus (USB)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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