AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 6

• Manufacturer Part Number: AT89C51RB2-RLTCM
• Description: 8-bit Microcontroller with 16K/ 32K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Table 8. Serial I/O Port SFRs
Table 9. SPI Controller SFRs
Table 10. Keyboard Interface SFRs
6
Mnemonic
Mnemonic
Mnemonic
BDRCON
SADDR
SPCON
SADEN
SPSTA
SPDAT
SCON
SBUF
KBLS
KBE
BRL
KBF
AT89C51RB2/RC2
Add
Add
Add
9Bh
C3h
C4h
C5h
9Ch
9Dh
98h
99h
B9h
A9h
9Ah
9Eh
Name
Serial Control
Serial Data Buffer
Slave Address Mask
Slave Address
Baud Rate Control
Baud Rate Reload
Name
SPI Control
SPI Status
SPI Data
Name
Keyboard Level Selector
Keyboard Input Enable
Keyboard Flag Register
FE/SM0
KBLS7
SPR2
SPD7
KBE7
KBF7
SPIF
7
7
7
KBLS6
WCOL
SPEN
SPD6
KBE6
KBF6
SM1
6
6
6
SSERR
KBLS5
SSDIS
SPD5
KBE5
KBF5
SM2
5
5
5
KBLS4
MSTR
MODF
SPD4
KBE4
KBF4
REN
BRR
4
4
4
KBLS3
CPOL
TBCK
SPD3
KBE3
KBF3
TB8
3
3
3
-
KBLS2
RBCK
CPHA
SPD2
KBE2
KBF2
RB8
2
2
2
-
KBLS1
SPR1
SPD1
KBE1
KBF1
SPD
1
1
1
TI
-
4180B–8051–04/03
KBLS0
SPR0
SPD0
KBE0
KBF0
SRC
RI
0
0
0
-