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Registers Table 34. SADEN Register<br />
SADEN - Slave Address Mask Register (B9h)<br />
Baud Rate Selection for<br />
UART for Mode 1 and 3<br />
56 <strong>AT89C51ID2</strong><br />
7 6 5 4 3 2 1 0<br />
Reset Value = 0000 0000b<br />
Not bit addressable<br />
Table 35. SADDR Register<br />
SADDR - Slave Address Register (A9h)<br />
7 6 5 4 3 2 1 0<br />
Reset Value = 0000 0000b<br />
Not bit addressable<br />
The Baud Rate Generator for transmit and receive clocks can be selected separately via<br />
the T2CON and BDRCON registers.<br />
Figure 24. Baud Rate Selection<br />
TIMER1<br />
TIMER2<br />
INT_BRG<br />
TIMER1<br />
TIMER2<br />
INT_BRG<br />
0<br />
1<br />
RCLK<br />
0<br />
1<br />
TCLK<br />
TIMER_BRG_RX<br />
TIMER_BRG_TX<br />
0<br />
1<br />
RBCK<br />
0<br />
1<br />
TBCK<br />
/ 16<br />
/ 16<br />
Rx Clock<br />
Tx Clock<br />
4289A–8051–09/03