AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 99
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AT83C51SND1C_03
Manufacturer Part Number
AT83C51SND1C_03
Description
Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT83C51SND1C_03.pdf
(210 pages)
- Current page: 99 of 210
- Download datasheet (2Mb)
Registers
4109E–8051–06/03
Table 90. USBCON Register
USBCON (S:BCh) – USB Global Control Register
Reset Value = 0000 0000b
Number
USBE
Bit
7
7
6
5
4
3
2
1
0
SDRMWUP
Mnemonic Description
SUSPCLK SDRMWUP
SUSPCLK
RMWUPE
FADDEN
UPRSM
CONFG
USBE
Bit
6
-
USB Enable Bit
Set this bit to enable the USB controller.
Clear this bit to disable and reset the USB controller, to disable the USB
transceiver an to disable the USB controllor clock inputs.
Suspend USB Clock Bit
Set to disable the 48 MHz clock input (Resume Detection is still active).
Clear to enable the 48 MHz clock input.
Send Remote Wake-Up Bit
Set to force an external interrupt on the USB controller for Remote Wake UP
purpose.
An upstream resume is send only if the bit RMWUPE is set, all USB clocks are
enabled AND the USB bus was in SUSPEND state for at least 5 ms. See
UPRSM below.
Cleared by software.
Reserved
The value read from this bit is always 0. Do not set this bit.
Upstream Resume Bit (read only)
Set by hardware when SDRMWUP has been set and if RMWUPE is enabled.
Cleared by hardware after the upstream resume has been sent.
Remote Wake-Up Enable Bit
Set to enabled request an upstream resume signaling to the host.
Clear after the upstream resume has been indicated by RSMINPR.
Note: Do not set this bit if the host has not set the DEVICE_REMOTE_WAKEUP
feature for the device.
Configuration Bit
This bit should be set by the device firmware after a SET_CONFIGURATION
request with a non-zero value has been correctly processed.
It should be cleared by the device firmware when a SET_CONFIGURATION
request with a zero value is received. It is cleared by hardware on hardware
reset or when an USB reset is detected on the bus (SE0 state for at least 32 Full
Speed bit times: typically 2.7 µs).
Function Address Enable Bit
This bit should be set by the device firmware after a successful status phase of a
SET_ADDRESS transaction.
It should not be cleared afterwards by the device firmware. It is cleared by
hardware on hardware reset or when an USB reset is received (see above).
When this bit is cleared, the default function address is used (0).
5
4
-
UPRSM
3
RMWUPE
AT8xC51SND1C
2
CONFG
1
FADDEN
0
99
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