AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 47

• Manufacturer Part Number: AT89C51RC2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RC2

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Registers
Baud Rate Selection for
UART for Mode 1 and 3
4180E–8051–10/06
Table 30. SADEN Register
SADEN - Slave Address Mask Register (B9h)
Reset Value = 0000 0000b
Not bit addressable
Table 31. SADDR Register
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 20. Baud Rate Selection
TIMER1
TIMER2
TIMER1
TIMER2
INT_BRG
INT_BRG
7
7
6
6
RCLK
TCLK
0
1
0
1
5
5
TIMER_BRG_RX
TIMER_BRG_TX
4
4
3
3
RBCK
TBCK
0
1
0
1
AT89C51RB2/RC2
2
2
/ 16
/ 16
Rx Clock
Tx Clock
1
1
0
0
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