AT89S53-24JC Atmel, AT89S53-24JC Datasheet - Page 12

• Manufacturer Part Number: AT89S53-24JC
• Description: IC MICRO CTRL 24MHZ 44PLCC
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S53-24JC

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 x 16 bit
• Operating Supply Voltage: 4 V to 6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: No

Figure 3. Timer 2 Auto Reload Mode (DCEN = 1)
Figure 4. Timer 2 in Baud Rate Generator Mode
12
T2EX PIN
OSC
T2 PIN
AT89S53
÷
2
TRANSITION
DETECTOR
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
C/T2 = 0
C/T2 = 1
EXEN2
TR2
CONTROL
CONTROL
RCAP2H
TH2
EXF2
RCAP2L
TL2
INTERRUPT
TIMER 2
÷
2
"1"
"1"
TIMER 1 OVERFLOW
"0"
"0"
"0"
"1"
÷
SMOD1
RCLK
TCLK
÷
16
16
0787E–MICRO–3/06
CLOCK
CLOCK
Rx
Tx