AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 72

• 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

15.3
72
Baud Rate Selection for UART for Mode 1 and 3
AT89C5130A/31A-M
SADEN - Slave Address Mask Register (B9h)
Reset Value = 0000 0000b
Not bit addressable
SADDR - Slave Address Register (A9h)
Reset Value = 0000 0000b
Not bit addressable
The Baud Rate Generator for transmit and receive clocks can be selected separately via the
T2CON and BDRCON registers.
Figure 15-4. Baud Rate Selection
7
7
TIMER1
TIMER2
TIMER1
TIMER2
INT_BRG
INT_BRG
6
6
RCLK
TCLK
5
5
0
1
0
1
TIMER_BRG_RX
TIMER_BRG_TX
4
4
3
3
RBCK
TBCK
0
1
0
1
2
2
/ 16
/ 16
Rx Clock
1
1
Tx Clock
4337K–USB–04/08
0
0