AT83C5134 Atmel Corporation, AT83C5134 Datasheet - Page 117

• Manufacturer Part Number: AT83C5134
• Manufacturer: Atmel Corporation

Specifications of AT83C5134

• Max. Operating Frequency: 32 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): 512
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 4
• Mask Rom (kbytes): 8
• Watchdog: Yes

21.9
Figure 21-14. Disconnect Timing
21.10 USB Interrupt System
21.10.1
7683C–USB–11/07
Detach Simulation
Interrupt System Priorities
D+
D-
V
IHZ
(min)
V
V
IL
SS
Controller
In order to be re-enumerated by the Host, the AT83C5134/35/36 has the possibility to simulate a
DETACH - ATTACH of the USB bus.
The V
up as shown in
set to 1 in the USBCON register. Maintaining this output in high impedance for more than 3 µs
will simulate the disconnection of the device. When resetting the DETACH bit, an attach is then
simulated.
Figure 21-13. Example of V
Figure 21-15. USB Interrupt Control System
USB
D+
D-
REF
Disconnected
output voltage is between 3.0V and 3.6V. This output can be connected to the D+ pull-
Device
Figure
21-13. This output can be put in high-impedance when the DETACH bit is
EUSB
IE1.6
Interrupt Enable
AT89C5131
REF
> = 2,5 ms
Connection
IE0.7
EA
V
REF
D-
D+
Disconnect
Detected
Priority Enable
1.5 kW
IPH/L
00
01
10
11
AT83C5134/35/36
Lowest Priority Interrupts
1
2
3
4
USB-B Connector
D-
D+
GND
V
CC
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