AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 100

• Manufacturer Part Number: AT89LP51ED2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51ED2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Eeprom (bytes): 4096
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

Table 15-5.
15.2
100
CL Address = 0E9H
Not Bit Addressable
Bit
Symbol
C
7-0
PCA Modules
AT89LP51RD2/ED2/ID2 Preliminary
C7
7
Function
Module n Compare/Capture Register Low
Holds the lower order bits of the 16-bit PCA Timer/Counter.
CL – PCA Counter Register Low
C6
Figure 15-2. PCA Interrupt System
Each one of the five compare/capture modules has six possible functions. It can perform:
In addition, Module 4 can be used as a Watchdog Timer.
Each module in the PCA has a special function register associated with it. These registers are:
CCAPM0 for Module 0, CCAPM1 for Module 1, etc. (See
bits that control the mode that each module will operate in.
6
• 16-bit Capture, positive-edge triggered
• 16-bit Capture, negative-edge triggered
• 16-bit Capture, both positive and negative-edge triggered
• 16-bit Software Timer
• 16-bit High Speed Output
• 8-bit Pulse Width Modulator
• The ECCF bit (CCAPMn.0 where n = 0, 1, 2, 3, or 4 depending on the module) enables the
• PWM (CCAPMn.1) enables the pulse width modulation mode.
CCF flag in the CCON SFR to generate an interrupt when a match or compare occurs in the
associated module.
Timer/Counter
Module 4
Module 3
Module 2
Module 1
Module 0
C5
5
CCON
7
4
3
2
1
0
C4
CF
CCF0
CCF0
CCF0
CCF0
CCF0
4
CCAPMn.0
ECCF4
ECCF3
ECCF2
ECCF1
ECCF0
CMOD.0
ECF
C3
3
C2
2
Table
IEN0.6
EC
Reset Value = 0000 0000B
15-6). The registers contain the
C1
1
IEN0.7
EA
PCA Interrupt
to priority
decoder
C0
3714A–MICRO–7/11
0