AT80C51SND1C-ROTIL Atmel, AT80C51SND1C-ROTIL Datasheet - Page 85

• Manufacturer Part Number: AT80C51SND1C-ROTIL
• Description: IC MCU FLASH MP3 DECODER 80-TQFP
• Manufacturer: Atmel
• Series: 80Cr

Specifications of AT80C51SND1C-ROTIL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
• Peripherals: Audio, I²S, MP3, PCM, POR, WDT
• Number Of I /o: 44
• Program Memory Type: ROMless
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: AT80C51SND1CROTIL

15.2.2
Figure 15-7. Endpoint Selection
4109L–8051–02/08
Endpoint 0
Endpoint 2
Endpoint Configuration
UEPSTA0
UEPSTA2
•
•
•
•
•
Set configuration
The CONFG bit in the USBCON register should be set after a SET_CONFIGURATION
request with a non-zero value. Otherwise, this bit should be cleared.
Selection of an Endpoint
The endpoint register access is performed using the UEPNUM register. The registers
–
–
–
–
Theses registers correspond to the endpoint whose number is stored in the UEPNUM regis-
ter. To select an Endpoint, the firmware has to write the endpoint number in the UEPNUM
register.
Endpoint enable
Before using an endpoint, this must be enabled by setting the EPEN bit in the UEPCONX
register.
An endpoint which is not enabled won’t answer to any USB request. The Default Control
Endpoint (Endpoint 0) should always be enabled in order to answer to USB standard
requests.
Endpoint type configuration
All Standard Endpoints can be configured in Control, Bulk, Interrupt or Isochronous mode.
The Ping-pong Endpoints can be configured in Bulk, Interrupt or Isochronous mode. The
configuration of an endpoint is performed by setting the field EPTYPE with the following
values:
–
–
–
–
The Endpoint 0 is the Default Control Endpoint and should always be configured in Control
type.
Endpoint direction configuration
For Bulk, Interrupt and Isochronous endpoints, the direction is defined with the EPDIR bit of
the UEPCONX register with the following values:
UEPSTAX
UEPCONX
UEPDATX
UBYCTX
Control:
Isochronous: EPTYPE = 01b
Bulk:
Interrupt:
UEPCON0
UEPCON2
UBYCT2
UBYCT0
UEPDAT0
UEPDAT2
EPTYPE = 00b
EPTYPE = 10b
EPTYPE = 11b
UEPNUM
0
1
2
X
UEPSTAX
SFR Registers
AT8xC51SND1C
UEPCONX
UBYCTX
UEPDATX
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