AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 120

• Manufacturer Part Number: AT89C5131A-L
• Manufacturer: Atmel Corporation

Specifications of AT89C5131A-L

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 48 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Sram (kbytes): 1.25
• Eeprom (bytes): 1024
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

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AT89C5131A-L
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Table 90. Summary of Endpoint Configuration
Endpoint Configuration
Disabled
Control
Bulk-in
Bulk-out
Interrupt-In
Interrupt-Out
Isochronous-In
Isochronous-Out
Before using an endpoint, this one will 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) will always be enabled in order to answer to USB
standard requests.
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 will always be configured in
Control type.
For Bulk, Interrupt and Isochronous endpoints, the direction is defined with the
EPDIR bit of the UEPCONX register with the following values:
For Control endpoints, the EPDIR bit has no effect.
Do not forget to select the correct endpoint number in the UEPNUM register before
accessing to endpoint specific registers.
Endpoint enable
Endpoint type configuration
–
–
–
–
Endpoint direction configuration
–
–
Summary of Endpoint Configuration:
Control:EPTYPE = 00b
Isochronous:EPTYPE = 01b
Bulk:EPTYPE = 10b
Interrupt:EPTYPE = 11b
IN:EPDIR = 1b
OUT:EPDIR = 0b
EPEN
0b
1b
1b
1b
1b
1b
1b
1b
EPDIR
Xb
Xb
1b
0b
1b
0b
1b
0b
EPTYPE
XXb
00b
10b
10b
11b
11b
01b
01b
4338F–USB–08/07
0XXX XXXb
UEPCONX
80h
86h
82h
87h
83h
85h
81h