AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 113
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AT89C51AC3
Manufacturer Part Number
AT89C51AC3
Description
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT89C51AC3-RLTUM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT89C51AC3-SLSIM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Interrupt System
Introduction
Figure 63. Interrupt Control System
4383D–8051–02/08
CEX0:5
AIN1:0
INT0#
INT1#
RxD
TxD
Interrupt 0
Interrupt 1
Converter
Controller
External
External
Timer 0
Timer 1
Timer 2
A to D
UART
PCA
SPI
The Micro-controller has a total of 9 interrupt vectors: two external interrupts (INT0 and
INT1), three timer interrupts (timers 0, 1 and 2), a serial port interrupt, a PCA, a timer
overrun interrupt and an ADC. These interrupts are shown below.
EADC
IEN0.0
IEN0.1
IEN0.2
IEN0.3
IEN0.6
IEN0.4
IEN0.5
IEN1.1
IEN1.3
Interrupt Enable
ESPI
EX0
ET0
EX1
ET1
ET2
EC
ES
IEN0.7
EA
Priority Enable
IPH/L
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
Lowest Priority Interrupts
Highest
Priority
Interrupts
113