AT89C55WD-24PU Atmel, AT89C55WD-24PU Datasheet - Page 30
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AT89C55WD-24PU
Manufacturer Part Number
AT89C55WD-24PU
Description
IC 8051 MCU FLASH 20K 40DIP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C55WD-24AU.pdf
(35 pages)
Specifications of AT89C55WD-24PU
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
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
UART
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
4 V to 6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Minimum Operating Temperature
- 40 C
Package
40PDIP
Device Core
8051
Family Name
89C
Maximum Speed
24 MHz
Cpu Family
AT89
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
Package Type
PDIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C55WD-24PU
Manufacturer:
ATM
Quantity:
6 250
Company:
Part Number:
AT89C55WD-24PU
Manufacturer:
ATMEL
Quantity:
48 565
Company:
Part Number:
AT89C55WD-24PU
Manufacturer:
ATM
Quantity:
6 250
Company:
Part Number:
AT89C55WD-24PU
Manufacturer:
ATMEL
Quantity:
13
Part Number:
AT89C55WD-24PU
Manufacturer:
PHI
Quantity:
20 000
34. Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
35. Shift Register Mode Timing Waveforms
36. AC Testing Input/Output Waveforms
37. Float Waveforms
30
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
INSTRUCTION
WRITE TO SBUF
OUTPUT DATA
INPUT DATA
CLEAR RI
AT89C55WD
CLOCK
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising Edge
Output Data Hold After Clock Rising Edge
Input Data Hold After Clock Rising Edge
Clock Rising Edge to Input Data Valid
ALE
Note:
Note:
(1)
0
t
V
QVXH
V
1. AC Inputs during testing are driven at V
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage
LOAD
CC
CC
measurements are made at V
occurs. A port pin begins to float when a 100 mV change from the loaded V
occurs.
- 0.5V
0.45V
t
= 4.0V to 5.5V and Load Capacitance = 80 pF.
1
XHDV
V
V
LOAD
0
LOAD
VALID
+ 0.1V
- 0.1V
2
t
XLXL
t
1
XHQX
VALID
Timing Reference
0.2 V
0.2 V
TEST POINTS
(1)
3
Points
t
Min
700
XHDX
1.0
2
50
0
12 MHz Osc
VALID
CC
CC
IH
+ 0.9V
- 0.1V
min. for a logic 1 and V
4
3
Max
700
VALID
CC
V
- 0.5V for a logic 1 and 0.45V for a logic 0. Timing
V
OL
OL
5
- 0.1V
+ 0.1V
4
VALID
10t
2t
12t
CLCL
CLCL
Min
Variable Oscillator
0
CLCL
IL
6
-133
-80
max. for a logic 0.
5
VALID
7
10t
6
VALID
CLCL
Max
-133
SET TI
OH
SET RI
1921D–MICRO–6/08
8
/V
OL
7
VALID
level
Units
ns
µs
ns
ns
ns