AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 52

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

Specifications of AT89C5131A-L

• 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): 3.0 to 3.6
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

52
AT89C5131A-L
It is possible to use Timer 2 as a baud rate generator and a clock generator simulta-
neously. For this configuration, the baud rates and clock frequencies are not
independent since both functions use the values in the RCAP2H and RCAP2L registers.
Figure 27. Clock-out Mode C/T2 = 0
T2EX
F
CLK PERIPH
T2
: 6
T2CON
EXEN2
Q
Toggle
T2CON
TR2
D
T2CON
RCAP2L
EXF2
(8-bit)
(8-bit)
TL2
T2MOD
T2OE
RCAP2H
(8-bit)
(8-bit)
TH2
INTERRUPT
Timer 2
4338F–USB–08/07
OVERFLOW