AT89C51RD2 Atmel Corporation, AT89C51RD2 Datasheet - Page 5

• 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 3-3.
Table 3-4.
Table 3-5.
4235K–8051–05/08
Mnemonic
IEN0
IEN1
IPH0
IPL0
IPH1
IPL1
Mnemonic
P0
P1
P2
P3
P4
P5
P5
Mnemonic
TCON
TMOD
TL0
TH0
TL1
TH1
WDTRST
WDTPRG
T2CON
T2MOD
RCAP2H
RCAP2L
TH2
Add
Add
Add
CBh
CAh
CDh
A8h
B1h
B7h
B8h
B3h
B2h
A0h
B0h
C0h
E8h
C7h
8Ah
8Ch
8Bh
8Dh
A6h
A7h
C8h
C9h
80h
90h
88h
89h
Interrupt SFRs
Port SFRs
Timer SFRs
Name
Interrupt Enable Control 0
Interrupt Enable Control 1
Interrupt Priority Control High 0
Interrupt Priority Control Low 0
Interrupt Priority Control High 1
Interrupt Priority Control Low 1
Name
8-bit Port 0
8-bit Port 1
8-bit Port 2
8-bit Port 3
8-bit Port 4
8-bit Port 5
8-bit Port 5 (byte addressable)
Name
Timer/Counter 0 and 1 Control
Timer/Counter 0 and 1 Modes
Timer/Counter 0 Low Byte
Timer/Counter 0 High Byte
Timer/Counter 1 Low Byte
Timer/Counter 1 High Byte
WatchDog Timer Reset
WatchDog Timer Program
Timer/Counter 2 control
Timer/Counter 2 Mode
Timer/Counter 2 Reload/Capture
High Byte
Timer/Counter 2 Reload/Capture
Low Byte
Timer/Counter 2 High Byte
GATE1
TF1
TF2
EA
7
7
7
-
-
-
-
-
-
-
PPCH
PPCL
C/T1#
EXF2
TR1
EC
6
6
6
-
-
-
-
-
RCLK
PT2H
PT2L
ET2
TF0
M11
5
5
5
-
-
-
-
-
TCLK
PHS
PLS
TR0
M01
ES
4
4
4
-
-
-
-
-
EXEN2
GATE0
PT1H
PT1L
ET1
AT89C51RD2/ED2
IE1
3
3
3
-
-
-
-
-
WTO2
C/T0#
PX1H
PX1L
ESPI
SPIH
SPIL
EX1
TR2
IT1
2
2
2
-
WTO1
C/T2#
PT0H
T2OE
PT0L
M10
ET0
IE0
1
1
1
CP/RL2#
WTO0
DCEN
KBDH
PX0H
KBDL
PX0L
KBD
M00
EX0
IT0
0
0
0
5