AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 11

• Manufacturer Part Number: AT89C51AC3
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC3

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

SFR Mapping
4383D–8051–02/08
Mnemonic
ACC
B
PSW
SP
DPL
DPH
Mnemonic
P0
P1
P2
P3
P4
Mnemonic
TH0
TL0
TH1
TL1
TH2
TL2
TCON
TMOD
Add Name
Add Name
Add Name
CDh
CCh
E0h Accumulator
F0h B Register
D0h Program Status Word
A0h Port 2
B0h Port 3
C0h Port 4 (x5)
8Ch
8Ah
8Dh
8Bh
81h Stack Pointer
82h
83h
80h Port 0
90h Port 1
88h
89h
Data Pointer Low
byte
LSB of DPTR
Data Pointer High
byte
MSB of DPTR
Timer/Counter 0 High
byte
Timer/Counter 0 Low
byte
Timer/Counter 1 High
byte
Timer/Counter 1 Low
byte
Timer/Counter 2 High
byte
Timer/Counter 2 Low
byte
Timer/Counter 0 and
1 control
Timer/Counter 0 and
1 Modes
The Special Function Registers (SFRs) of the AT89C51AC3 fall into the following
categories:
GATE1
TF1
CY
7
7
7
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
C/T1#
TR1
AC
6
6
6
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
TF0
M11
F0
5
5
5
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
P4.4 /
MOSI
RS1
TR0
M01
4
4
4
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
GATE0
P4.3 /
SCK
RS0
IE1
3
3
3
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
C/T0#
P4.2 /
MISO
OV
IT1
2
2
2
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
P4.1
M10
IE0
F1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
P4.0
M00
IT0
0
0
0
P
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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