AT89C55WD-24JI Atmel, AT89C55WD-24JI Datasheet - Page 13

• Manufacturer Part Number: AT89C55WD-24JI
• Description: IC MICRO CTRL 24MHZ 44PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C55WD-24JI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C55WD24JI

Table 12-2.
Figure 12-3. Timer 2 Auto Reload Mode (DCEN = 1)
1921D–MICRO–6/08
Symbol
–
T2OE
DCEN
T2MOD Address = 0C9H
Not Bit Addressable
Bit
OSC
Function
Not implemented, reserved for future
Timer 2 Output Enable bit
When set, this bit allows Timer 2 to be configured as an up/down counter
T2MOD – Timer 2 Mode Control Register
–
7
T2 PIN
÷
12
–
6
C/T2 = 0
C/T2 = 1
–
5
TR2
CONTROL
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
–
4
RCAP2H
0FFH
TH2
–
3
RCAP2L
0FFH
TL2
OVERFLOW
–
2
Reset Value = XXXX XX00B
T2EX PIN
T2OE
COUNT
DIRECTION
1=UP
0=DO
1
TOGGLE
AT89C55WD
INTERRUPT
DCEN
TIMER 2
0
TF2
EXF2
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