AT80C51RD2-SLSUM Atmel, AT80C51RD2-SLSUM Datasheet - Page 27

• Manufacturer Part Number: AT80C51RD2-SLSUM
• Description: MCU, 8BIT, 8051, 5V, SPI, 20MHZ, 44PLCC
• Manufacturer: Atmel

Specifications of AT80C51RD2-SLSUM

• Controller Family/series: (8051) 8052
• No. Of I/o's: 32
• Ram Memory Size: 1280Byte
• Cpu Speed: 40MHz
• No. Of Timers: 3
• No. Of Pwm Channels: 5
• Core Size: 8bit
• Oscillator Type: External Only
• Processor Series: AT80x
• Core: 8051
• Data Bus Width: 8 bit
• Program Memory Type: ROMLess
• Data Ram Size: 1280 B
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Cpu Family: AT80
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Program Memory Size: Not Required
• Total Internal Ram Size: 1.25KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 6-5.
4188F–8051–01/08
PCA Timer/Counter
PCA Interrupt System
Module 0
Module 1
Module 2
Module 3
Module 4
CMOD.0
PCA Modules: 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 Table 6-6). The registers contain the
bits that control the mode that each module will operate in.
• 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.
• The TOG bit (CCAPMn.2) when set causes the CEX output associated with the module to
• The match bit MAT (CCAPMn.3) when set will cause the CCFn bit in the CCON register to be
• The next two bits CAPN (CCAPMn.4) and CAPP (CCAPMn.5) determine the edge that a
CCF flag in the CCON SFR to generate an interrupt when a match or compare occurs in the
associated module.
toggle when there is a match between the PCA counter and the module's capture/compare
register.
set when there is a match between the PCA counter and the module's capture/compare
register.
capture input will be active on. The CAPN bit enables the negative edge, and the CAPP bit
enables the positive edge. If both bits are set both edges will be enabled and a capture will
occur for either transition.
ECF
CF
ECCFn CCAPMn.0
CR
CCF4 CCF3 CCF2 CCF1 CCF0
IE.6
EC
IE.7
EA
AT/TS8xC51Rx2
priority decoder
CCON
0xD8
To Interrupt
27