AT89C5131A-PUTIM Atmel, AT89C5131A-PUTIM Datasheet - Page 120

IC 8051 MCU FLASH 32K USB 32QFN

AT89C5131A-PUTIM

Manufacturer Part Number
AT89C5131A-PUTIM
Description
IC 8051 MCU FLASH 32K USB 32QFN
Manufacturer
Atmel
Series
AT89C513xr
Datasheet

Specifications of AT89C5131A-PUTIM

Core Processor
C52X2
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
LED, POR, PWM, WDT
Number Of I /o
18
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)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
For Use With
AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
21. USB Controller
21.1
Figure 21-1. USB Device Controller Block Diagram
21.1.1
120
Description
AT89C5130A/31A-M
Serial Interface Engine (SIE)
D+
D-
.
The USB device controller provides the hardware that the AT89C5131 needs to interface a USB
link to a data flow stored in a double port memory (DPRAM).
The USB controller requires a 48 MHz ±0.25% reference clock, which is the output of the
AT89C5131 PLL (see Section “PLL”, page 15) divided by a clock prescaler. This clock is used to
generate a 12 MHz Full-speed bit clock from the received USB differential data and to transmit
data according to full speed USB device tolerance. Clock recovery is done by a Digital Phase
Locked Loop (DPLL) block, which is compliant with the jitter specification of the USB bus.
The Serial Interface Engine (SIE) block performs NRZI encoding and decoding, bit stuffing, CRC
generation and checking, and the serial-parallel data conversion.
The Universal Function Interface (UFI) realizes the interface between the data flow and the Dual
Port RAM.
The SIE performs the following functions:
USB
D+/D-
Buffer
• NRZI data encoding and decoding.
• Bit stuffing and un-stuffing.
• CRC generation and checking.
• Handshakes.
• TOKEN type identifying.
DPLL
SIE
48 MHz
12 MHz
+/- 0.25%
UFI
C51
Microcontroller
Interface
Up to 48 MHz
UC_sysclk
4337K–USB–04/08

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