Home >
Integrated Circuits >
Microcontrollers >
Atmel
AT89C2051-24SC - AT89C2051 20-pin 2kB 80 Series Microcontroller Technical Data
| Photograph |
|
| Features |
- Compatible with MCS-51 Products
- 2K Bytes of Reprogrammable Flash Memory
- 2.7 to 6V Operating Range
- Fully Static Operation: 0 Hz to 24 MHz
- Two-level Program Memory Lock
- 128 x 8-bit Internal RAM
- 15 Programmable I/O Lines
- Two 16-bit Timer/Counters
- Six Interrupt Sources
- Programmable Serial UART Channel
- Direct LED Drive Outputs
- On-chip Analog Comparator
- Low-power Idle and Power-down Modes
- 20-pin SOIC
|
| Pin Layout |
|
| Pin Description |
|
Pin Number
|
Description
|
|
1
|
RESET - Reset
|
|
2
|
P3.0 - Port 3 - RXD
|
|
3
|
P3.1 - Port 3 - TXD
|
|
4
|
XTAL2 - Crystal
|
|
5
|
XTAL1 - Crystal
|
|
6
|
P3.2 - Port 3 - INT0
|
|
7
|
P3.3 - Port 3 - INT1
|
|
8
|
P3.4 - Port 3 - TO
|
|
9
|
P3.5 - Port 3 - T1
|
|
10
|
GND - Ground
|
|
11
|
P3.7 - Port 3
|
|
12
|
P1.0 - Port 1 - AIN0
|
|
13
|
P1.1 - Port 1 - AIN1
|
|
14
|
P1.2 - Port 1
|
|
15
|
P1.3 - Port 1
|
|
16
|
P1.4 - Port 1
|
|
17
|
P1.5 - Port 1
|
|
18
|
P1.6 - Port 1
|
|
19
|
P1.7 - Port 1
|
|
20
|
Vcc - Positive Supply
|
|
| Dimensional Drawing |
|
| Technical Data |
|
Datasheet
Application Notes
|
Integrated Circuits