AT89C51RC-24PU Atmel, AT89C51RC-24PU Datasheet - Page 15

• Manufacturer Part Number: AT89C51RC-24PU
• Description: IC MCU 32K FLASH 24MHZ 40-DIP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RC-24PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Cpu Family: 89C
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 24MHz
• Interface Type: UART
• Total Internal Ram Size: 512Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 40
• Package Type: PDIP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 bit
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

Figure 13-2. Timer 2 Auto Reload Mode (DCEN = 0)
Table 13-2.
Figure 13-3. Timer 2 Auto Reload Mode (DCEN = 1)
1920D–MICRO–6/08
Symbol
–
T2OE
DCEN
T2MOD Address = 0C9H
Not Bit Addressable
Bit
T2EX PIN
Not implemented, reserved for future
When set, this bit allows Timer 2 to be configured as an up/down counter
Function
Timer 2 Output Enable bit
T2MOD—Timer 2 Mode Control Register
OSC
–
7
OSC
T2 PIN
T2 PIN
12
12
–
6
TRANSITION
DETECTOR
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
–
5
TR2
EXEN2
CONTROL
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
CONTROL
TR2
–
4
CONTR OL
RELO AD
RCAP2H
0FFH
TH2
RCAP2L
–
3
0FFH
RCAP2H
TL2
TH2
OVERFLOW
RCAP2L
TL2
–
2
T2EX PIN
Reset Value = XXXX XX00B
COUNT
DIRECTION
1=UP
0=DO
OVERFLOW
TOGGLE
T2OE
EXF2
TF2
1
INTERRUPT
TIMER 2
TF2
AT89C51RC
INTERRUPT
DCEN
EXF2
TIMER 2
0
15