AT89S52-24PU Atmel, AT89S52-24PU Datasheet - Page 13
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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 10-1. Timer in Capture Mode
Table 10-2.
1919C–MICRO–3/05
Symbol
–
T2OE
DCEN
T2MOD Address = 0C9H
Not Bit Addressable
Bit
T2EX PIN
OSC
T2MOD – Timer 2 Mode Control Register
T2 PIN
–
7
Function
Not implemented, reserved for future
Timer 2 Output Enable bit
When set, this bit allows Timer 2 to be configured as an up/down counter
÷12
Figure 10-2
are selected by bit EXEN2 in T2CON. If EXEN2 = 0, Timer 2 counts up to 0FFFFH and then sets
the TF2 bit upon overflow. The overflow also causes the timer registers to be reloaded with the
16-bit value in RCAP2H and RCAP2L. The values in Timer in Capture ModeRCAP2H and
RCAP2L are preset by software. If EXEN2 = 1, a 16-bit reload can be triggered either by an
overflow or by a 1-to-0 transition at external input T2EX. This transition also sets the EXF2 bit.
Both the TF2 and EXF2 bits can generate an interrupt if enabled.
Setting the DCEN bit enables Timer 2 to count up or down, as shown in
mode, the T2EX pin controls the direction of the count. A logic 1 at T2EX makes Timer 2 count
up. The timer will overflow at 0FFFFH and set the TF2 bit. This overflow also causes the 16-bit
value in RCAP2H and RCAP2L to be reloaded into the timer registers, TH2 and TL2,
respectively.
A logic 0 at T2EX makes Timer 2 count down. The timer underflows when TH2 and TL2 equal
the values stored in RCAP2H and RCAP2L. The underflow sets the TF2 bit and causes 0FFFFH
to be reloaded into the timer registers.
The EXF2 bit toggles whenever Timer 2 overflows or underflows and can be used as a 17th bit
of resolution. In this operating mode, EXF2 does not flag an interrupt.
TRANSITION
DETECTOR
–
6
shows Timer 2 automatically counting up when DCEN = 0. In this mode, two options
C/T2 = 0
C/T2 = 1
–
5
EXEN2
TR2
–
4
CAPTURE
CONTROL
CONTROL
–
3
RCAP2H
TH2
EXF2
RCAP2L
–
2
TL2
Reset Value = XXXX XX00B
OVERFLOW
T2OE
1
TF2
DCEN
Figure
0
INTERRUPT
AT89S52
TIMER 2
10-2. In this
13