AT89S51-24JU Atmel, AT89S51-24JU Datasheet - Page 26
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AT89S51-24JU
Manufacturer Part Number
AT89S51-24JU
Description
IC MCU 4K FLASH 24MHZ 44-PLCC
Manufacturer
Atmel
Series
89Sr
Datasheet
1.AT89S51-24JU.pdf
(31 pages)
Specifications of AT89S51-24JU
Core Processor
8051
Core Size
8-Bit
Speed
24MHz
Connectivity
UART/USART
Peripherals
WDT
Number Of I /o
32
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
UART
Maximum Clock Frequency
33 MHz
Number Of Programmable I/os
32
Number Of Timers
2
Operating Supply Voltage
4 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89S51-24JU
Manufacturer:
ATMEL
Quantity:
13 888
Part Number:
AT89S51-24JU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
30. Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
31. Shift Register Mode Timing Waveforms
32. AC Testing Input/Output Waveforms
Note:
33. Float Waveforms
Note:
26
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
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 occurs. A port pin begins to
AT89S51
INSTRUCTION
min. for a logic 1 and V
float when a 100 mV change from the loaded V
WRITE TO SBUF
OUTPUT DATA
INPUT DATA
CLEAR RI
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
CLOCK
ALE
(1)
IL
max. for a logic 0.
0
t
V
QVXH
V
LOAD
CC
CC
- 0.5V
= 4.0V to 5.5V and Load Capacitance = 80 pF.
0.45V
t
1
XHDV
V
V
LOAD
0
LOAD
VALID
CC
+ 0.1V
- 0.5V for a logic 1 and 0.45V for a logic 0. Timing measurements are made at V
- 0.1V
2
t
XLXL
t
1
OH
XHQX
VALID
/V
Timing Reference
OL
0.2 V
0.2 V
TEST POINTS
(1)
3
level occurs.
Points
t
Min
700
XHDX
2
1.0
50
VALID
0
CC
CC
12 MHz Osc
+ 0.9V
- 0.1V
4
3
VALID
Max
700
V
V
OL
OL
5
- 0.1V
+ 0.1V
4
VALID
10 t
2 t
12 t
CLCL
CLCL
6
Min
Variable Oscillator
0
CLCL
5
VALID
-133
-80
7
6
VALID
10 t
SET TI
SET RI
CLCL
Max
8
7
-133
VALID
2487D–MICRO–6/08
Units
ns
ns
µs
ns
ns
IH