AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 69

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

15.1.2
Figure 15-4. SIE Block Diagram
4173E–USB–09/07
D+
Serial Interface Engine (SIE)
D-
generator and its calculation formula. The USB controller clock frequency must always be 48
MHz.
Figure 15-3. USB Clock Generator and Symbol
The SIE performs the following functions:
•
•
•
•
•
•
•
CLOCK
USB
NRZI data encoding and decoding
Bit stuffing and unstuffing
CRC generation and checking
ACKs and NACKs automatic generation
TOKEN type identifying
Address checking
Clock recovery (using DPLL)
Start of Packet
End of Packet
Detector
Detector
48 MHz
CLOCK
PLL
Recover
Clock
Packet Bit Counter
Parallel to Serial Converter
Bit Unstuffing
USB Pattern Generator
NRZI ‘ NRZ
CRC16 Generator
NRZI Converter
Bit Stuffing
USBCD1:0
USBCLK
SysClk
(12 MHz)
USBclk
Address Decoder
Serial to Parallel
SYNC Detector
Generator/Check
CRC5 & CRC16
PID Decoder
=
8
48 MHz USB Clock
Converter
------------------------------- -
USBCD
PLLclk
Data In
+
1
8
AT89C5132
Data Out
USB Clock Symbol
CLOCK
USB
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