AT89C51RD2 Atmel Corporation, AT89C51RD2 Datasheet - Page 7

• Manufacturer Part Number: AT89C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RD2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 2
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Table 3-9.
Table 3-10.
Table 3-11.
4235K–8051–05/08
Mnemonic
KBLS
KBE
KBF
Mnemonic
EECON
D8h
D0h
C8h
C0h
F8h
F0h
E8h
E0h
B8h
B0h
A8h
Addressable
addressable
0000 0000
0000 0000
00X0 0000
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
X000 000
1111 1111
T2CON
CCON
P5 bit
PSW
IEN0
ACC
IPL0
0/8
Bit
P4
P3
B
Add
Add
9Ch
9Dh
9Eh
D2h
Keyboard Interface SFRs
EEPROM data Memory SFR (AT89C51ED2 only)
SFR Mapping
Name
Keyboard Level Selector
Keyboard Input Enable
Keyboard Flag Register
Name
EEPROM Data Control
XXXX XX00
XXXX X000
00XX X000
XXXX 0000
0000 0000
0000 0000
0000 0000
0000 0000
T2MOD
SADEN
SADDR
CMOD
FCON
IEN1
1/9
CH
CL
XXXX XXXX
XXXX XXXX
XXXX X000
X000 0000
0000 0000
xxxx xx00
CCAP0H
CCAPM0
CCAP0L
RCAP2L
EECON
shows all SFRs with their address and their reset value.
IPL1
2/A
KBLS7
XXXX XXXX
XXXX XXXX
KBE7
KBF7
XXXX X000
X000 0000
0000 0000
0001 0100
CCAP1H
CCAPM1
RCAP2H
CCAP1L
SPCON
7
7
IPH1
3/B
KBLS6
KBE6
KBF6
Non Bit Addressable
6
6
XXXX XXXX
XXXX XXXX
X000 0000
0000 0000
0000 0000
CCAP2H
CCAPM2
CCAP2L
SPSTA
TL2
4/C
KBLS5
KBE5
KBF5
5
5
XXXX XXXX
XXXX XXXX
XXXX XXXX
KBLS4
X000 0000
0000 0000
KBE4
KBF4
CCAPM3
CCAP3H
CCAP3L
SPDAT
4
4
TH2
5/D
KBLS3
KBE3
KBF3
AT89C51RD2/ED2
3
3
XXXX XXXX
XXXX XXXX
X000 0000
CCAPM4
CCAP4H
CCAP4L
6/E
KBLS2
KBE2
KBF2
2
2
Addressable
XXXX XXX0
X000 0000
1111 1111
KBLS1
CKCON1
KBE1
KBF1
P5 byte
EEE
IPH0
1
1
7/F
EEBUSY
KBLS0
KBE0
KBF0
0
0
DFh
CFh
FFh
F7h
EFh
E7h
D7h
C7h
BFh
B7h
AFh
7