AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 136

• Manufacturer Part Number: AT89C5131A-M
• Manufacturer: Atmel Corporation

Specifications of AT89C5131A-M

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 48 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): 1024
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

Figure 21-14. Disconnect Timing
21.10 USB Interrupt System
21.10.1
136
AT89C5130A/31A-M
Interrupt System Priorities
D+
D-
V
IHZ
(min)
V
V
SS
IL
Controller
Figure 21-13. Example of V
Figure 21-15. USB Interrupt Control System
Table 21-2.
USB
D+
D-
Disconnected
Device
Priority Levels
IPHUSB
0
0
1
1
EUSB
IE1.6
Interrupt Enable
AT89C5131
REF
> = 2,5 ms
Connection
IE0.7
EA
V
REF
D-
D+
IPLUSB
0
1
0
1
Disconnect
Detected
Priority Enable
1.5 kW
IPH/L
00
01
10
11
USB Priority Level
0
1
2
3
Lowest
Highest
Lowest Priority Interrupts
1
2
3
4
USB-B Connector
V
D-
D+
GND
CC
4337K–USB–04/08