AT89S52-24PU Atmel, AT89S52-24PU Datasheet - Page 16
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AT89S52-24PU
Manufacturer Part Number
AT89S52-24PU
Description
IC MCU 8K FLASH 24MHZ 40-DIP
Manufacturer
Atmel
Series
89Sr
Specifications of AT89S52-24PU
Core Processor
8051
Core Size
8-Bit
Speed
24MHz
Connectivity
UART/USART
Peripherals
WDT
Number Of I /o
32
Program Memory Size
8KB (8K x 8)
Program Memory Type
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)
Package
40PDIP
Device Core
8051
Family Name
89S
Maximum Speed
24 MHz
Operating Supply Voltage
5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
32
Interface Type
UART
Number Of Timers
3
Processor Series
AT89x
Core
8051
Data Ram Size
256 B
Maximum Clock Frequency
24 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Minimum Operating Temperature
- 40 C
Eeprom Memory
0 Bytes
Input Output
32
Interface
UART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
8K Bytes
Timers
3-16-bit
Voltage, Range
4-5.5 V
Cpu Family
89S
Device Core Size
8b
Frequency (max)
24MHz
Total Internal Ram Size
256Byte
# I/os (max)
32
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4V
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
40
Controller Family/series
(8051) 8052
No. Of I/o's
32
Ram Memory Size
256Byte
Cpu Speed
24MHz
No. Of Timers
3
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
Q2897580
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89S52-24PU
Manufacturer:
NQVATEK
Quantity:
2 140
Company:
Part Number:
AT89S52-24PU
Manufacturer:
ATM
Quantity:
4 690
Company:
Part Number:
AT89S52-24PU
Manufacturer:
ATM
Quantity:
4 690
Part Number:
AT89S52-24PU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Figure 11-1. Timer 2 in Baud Rate Generator Mode
12. Programmable Clock Out
16
T2EX PIN
AT89S52
OSC
T2 PIN
÷
2
TRANSITION
DETECTOR
A 50% duty cycle clock can be programmed to come out on P1.0, as shown in
pin, besides being a regular I/O pin, has two alternate functions. It can be programmed to input
the external clock for Timer/Counter 2 or to output a 50% duty cycle clock ranging from 61 Hz to
4 MHz (for a 16-MHz operating frequency).
To configure the Timer/Counter 2 as a clock generator, bit C/T2 (T2CON.1) must be cleared and
bit T2OE (T2MOD.1) must be set. Bit TR2 (T2CON.2) starts and stops the timer.
The clock-out frequency depends on the oscillator frequency and the reload value of Timer 2
capture registers (RCAP2H, RCAP2L), as shown in the following equation.
In the clock-out mode, Timer 2 roll-overs will not generate an interrupt. This behavior is similar to
when Timer 2 is used as a baud-rate generator. It is possible to use Timer 2 as a baud-rate gen-
erator and a clock generator simultaneously. Note, however, that the baud-rate and clock-out
frequencies cannot be determined independently from one another since they both use
RCAP2H and RCAP2L.
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
C/T2 = 0
C/T2 = 1
Clock-Out Frequency
EXEN2
TR2
CONTROL
CONTROL
RCAP2H
TH2
EXF2
=
RCAP2L
------------------------------------------------------------------------------------ -
4 x [65536-(RCAP2H,RCAP2L)]
TL2
Oscillator Frequency
INTERRUPT
TIMER 2
÷
2
"1"
"1"
TIMER 1 OVERFLOW
"0"
"0"
"0"
"1"
÷
÷
SMOD1
RCLK
TCLK
16
16
Figure
1919D–MICRO–6/08
CLOCK
CLOCK
Rx
Tx
12-1. This