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

• Manufacturer Part Number: AT89C51RC-24JI
• Description: IC MICRO CTRL 24MHZ 44PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RC-24JI

• 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: 44-PLCC
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C51RC24JI

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
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