AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 120

• Manufacturer Part Number: AT89C5122D-RDRUM
• Description: IC 8051 MCU 32K CRAM USB 64-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-RDRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C5122D-RDRUMTR

120
AT83R5122, AT8xC5122/23
Table 71. USB FIFO Data Endpoint X (X=EPNUM set in UEPNUM Register) -
UEPDATX (S:CFh)
Reset Value = XXXX XXXXb
Table 72. USB Byte Count Register X (X=EPNUM set in UEPNUM Register) - UBYCTX
(S:E2h)
Reset Value = 0000 0000b
Number
Number
FDAT7
6 - 0
Bit
7 - 0
Bit
7
7
7
-
Mnemonic Description
BYCT[6:0]
Mnemonic
FDAT
Bit
BYCT6
FDAT6
-
Bit
6
6
[7:0]
Reserved
The value read from these bits is always 0. Do not change this bit.
Byte Count LSB
Least Significant Byte of the byte count of a received data packet. This byte count
is equal to the number of data bytes received after the Data PID.
Description
Endpoint X FIFO data
Data byte to be written to FIFO or data byte to be read from the FIFO, for the
Endpoint X (see EPNUM).
BYCT5
FDAT5
5
5
BYCT4
FDAT4
4
4
BYCT3
FDAT3
3
3
BYCT2
FDAT2
2
2
BYCT1
FDAT1
1
1
4202F–SCR–07/2008
BYCT0
FDAT0
0
0