AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 102
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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)
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102
AT8xC51SND1C
Table 95. UEPCONX Register
UEPCONX (S:D4h) – USB Endpoint X Control Register (X = EPNUM set in UEPNUM)
Reset Value = 1000 0000b
Number
EPEN
Bit
1-0
7
7
6
5
4
3
2
EPTYPE1:0
Mnemonic Description
NAKOUT
NAKIEN
NAKIEN
NAKIN
EPDIR
EPEN
DTGL
Bit
6
Endpoint Enable Bit
Set to enable the endpoint according to the device configuration. Endpoint 0
should always be enabled after a hardware or USB bus reset and participate in
the device configuration.
Clear to disable the endpoint according to the device configuration.
NAK Interrupt enable
Set this bit to enable NAK IN or NAK OUT interrupt.
Clear this bit to disable NAK IN or NAK OUT Interrupt.
NAK OUT received
This bit is set by hardware when an NAK handshake has been sent in response
of a OUT request from the Host. This triggers a USB interrupt when NAKIEN is
set.
This bit should be cleared by software.
NAK IN received
This bit is set by hardware when an NAK handshake has been sent in response
of a IN request from the Host. This triggers a USB interrupt when NAKIEN is set.
This bit should be cleared by software.
Data Toggle Status Bit (Read-only)
Set by hardware when a DATA1 packet is received.
Cleared by hardware when a DATA0 packet is received.
Endpoint Direction Bit
Set to configure IN direction for Bulk, Interrupt and Isochronous endpoints.
Clear to configure OUT direction for Bulk, Interrupt and Isochronous endpoints.
This bit has no effect for Control endpoints.
Endpoint Type Bits
Set this field according to the endpoint configuration (Endpoint 0 should always
be configured as Control):
00
01
10
11
NAKOUT
Control endpoint
Isochronous endpoint
Bulk endpoint
Interrupt endpoint
5
NAKIN
4
DTGL
3
EPDIR
2
EPTYPE1
1
4109E–8051–06/03
EPTYPE0
0
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