AT87F52-24AI Atmel, AT87F52-24AI Datasheet - Page 8

• Manufacturer Part Number: AT87F52-24AI
• Description: IC MICRO CTRL 24MHZ 44TQFP
• Manufacturer: Atmel
• Series: 87Fr

Specifications of AT87F52-24AI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: UART/USART
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP Quick FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

Figure 3. Timer 2 Auto Reload Mode (DCEN = 1)
Figure 4. Timer 2 in Baud Rate Generator Mode
8
T2EX PIN
OSC
OSC
T2 PIN
÷
T2 PIN
12
÷
2
TRANSITION
DETECTOR
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
Not
TR2
EXEN2
TR2
CONTROL
CONTROL
CONTROL
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
RCAP2H
0FFH
TH2
RCAP2H
TH2
EXF2
RCAP2L
0FFH
TL2
RCAP2L
TL2
OVERFLOW
INTERRUPT
TIMER 2
T2EX PIN
÷
2
"1"
"1"
TIMER 1 OVERFLOW
COUNT
DIRECTION
1=UP
0=DOWN
"0"
"0"
"0"
TOGGLE
INTERRUPT
"1"
TIMER 2
÷
TF2
÷
SMOD1
RCLK
TCLK
16
16
CLOCK
CLOCK
EXF2
Rx
Tx