at89s53-33pc ATMEL Corporation, at89s53-33pc Datasheet - Page 12

• Manufacturer Part Number: at89s53-33pc
• Description: At89s53, In-system Programmable Microcontroller With 12k Bytes Flash. For New Designs Use At89s8253.
• Manufacturer: ATMEL Corporation

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