TS80C51RA2 Atmel Corporation, TS80C51RA2 Datasheet - Page 36

• Manufacturer Part Number: TS80C51RA2
• Description: High Performance 8-bit Microcontroller
• Manufacturer: Atmel Corporation

Reset Addresses
36
TS8xC51Rx2
On reset, the SADDR and SADEN registers are initialized to 00h, i.e. the given and
broadcast addresses are XXXX XXXXb (all don’t-care bits). This ensures that the serial
port will reply to any address, and so, that it is backwards compatible with the 80C51
microcontrollers that do not support automatic address recognition.
Table 16. SADEN - Slave Address Mask Register (B9h)
Reset Value = 0000 0000b
Not bit addressable
Table 17. SADDR - Slave Address Register (A9h)
Reset Value = 0000 0000b
Not bit addressable
Table 18. SCON Register
SCON - Serial Control Register (98h)
FE/SM0
7
7
7
SM1
6
6
6
SM2
5
5
5
REN
4
4
4
TB8
3
3
3
RB8
2
2
2
TI
1
1
1
4188A–8051–10/02
RI
0
0
0