AT87F55WD-24PI Atmel, AT87F55WD-24PI Datasheet - Page 11
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AT87F55WD-24PI
Manufacturer Part Number
AT87F55WD-24PI
Description
IC MICRO CTRL 24MHZ 40DIP
Manufacturer
Atmel
Series
87Fr
Datasheet
1.AT87F55WD-24AC.pdf
(26 pages)
Specifications of AT87F55WD-24PI
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
OTP Quick FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT87F55WD24PI
Figure 7. Timer 2 Auto Reload Mode (DCEN = 1)
Figure 8. Timer 2 in Baud Rate Generator Mode
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
TR2
EXEN2
CONTROL
TR2
(DOWN COUNTING RELOAD VALUE)
CONTROL
CONTROL
(UP COUNTING RELOAD VALUE)
RCAP2H
0FFH
TH2
RCAP2H
TH2
EXF2
RCAP2L
0FFH
RCAP2L
TL2
TL2
OVERFLOW
INTERRUPT
TIMER 2
T2EX PIN
÷
2
"1"
"1"
TIMER 1 OVERFLOW
COUNT
DIRECTION
1=UP
0=DO
"0"
"0"
"0"
TOGGLE
"1"
INTERRUPT
TIMER 2
÷
÷
SMOD1
RCLK
TCLK
16
TF2
16
CLOCK
CLOCK
EXF2
Rx
Tx
11