AT89C5131A-S3SUL Atmel, AT89C5131A-S3SUL Datasheet - Page 118

• Manufacturer Part Number: AT89C5131A-S3SUL
• Description: MCU 8051 32K FLASH USB 52-PLCC
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5131A-S3SUL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: LED, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1.25 KB
• Interface Type: 2-Wire, EUART, SPI, USB
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 3 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89STK-05
• Minimum Operating Temperature: - 40 C
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Function Interface Unit (FIU)
Figure 58. UFI Block Diagram
Figure 59. Minimum Intervention from the USB Device Firmware
118
AT89C5131A-L
HOST
UFI
C51
IN Transactions:
HOST
UFI
C51
OUT Transactions:
DPLL
SIE
OUT DATA0 (n bytes)
IN
Endpoint FIFO write
NACK
FIU
The Function Interface Unit provides the interface between the AT89C5131 and the SIE.
It manages transactions at the packet level with minimal intervention from the device
firmware, which reads and writes the endpoint FIFOs.
DPR Control
USB Side
Transfer
Control
FSM
ACK
Asynchronous Information
Transfer
IN
interrupt C51
User DPRAM
DATA1
Endpoint FIFO read (n bytes)
OUT
Endpoint 6
Endpoint 5
Endpoint 4
Endpoint 3
Endpoint 2
Endpoint 1
Endpoint 0
DATA1
IN
NACK
CSREG 0 to 7
DPR Control
mP side
DATA1
Registers
Bank
OUT
ACK
interrupt C51
DATA1
C51
Microcontroller
Interface
Up to 48 MHz
UC_sysclk
Endpoint FIFO write
ACK
4338F–USB–08/07