AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 170

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AT89C5131A-M

Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT89C5131A-M

Flash (kbytes)
32 Kbytes
Max. Operating Frequency
48 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
1024
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART/USB
Watchdog
Yes
27.4.8
27.4.9
27.4.10
27.4.11
27.4.12
170
AT89C5130A/31A-M
Shift Register Timing Waveform
External Clock Drive Characteristics (XTAL1)
External Clock Drive Waveforms
AC Testing Input/Output Waveforms
Float Waveforms
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
INPUT DATA
CLEAR RI
Table 27-11. AC Parameters
AC inputs during testing are driven at V
measurement are made at V
For timing purposes as port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded V
≥ ±20 mA.
T
CHCX
Symbol
T
T
T
T
T
T
CHCX
CLCH
CHCL
CLCL
CLCX
QVXH
0
/T
CLCX
INPUT/OUTPUT
T
XHDV
0.45V
Parameter
Oscillator Period
High Time
Low Time
Rise Time
Fall Time
Cyclic ratio in X2 mode
1
0
V
VALID
T
CC
XLXL
-0.5V
T
XHQX
2
1
VALID
IH
0.2V
min for a logic “1” and V
T
0.7V
V
V
3
XHDX
2
V
OH
OL
CC
VALID
CC
CC
-0.1
T
+ 0.1 V
- 0.1 V
0.45V
CHCL
-0.5V
4
CC
3
VALID
FLOAT
- 0.5 for a logic “1” and 0.45V for a logic “0”. Timing
V
LOAD
5
4
VALID
T
CLCX
IL
Min
6
21
40
max for a logic “0”.
5
5
5
VALID
0.2 V
0.2 V
CC
CC
T
V
V
7
CLCL
+ 0.9
- 0.1
LOAD
LOAD
6
VALID
OH
+ 0.1 V
- 0.1 V
T
/V
SET TI
CLCH
SET RI
T
8
Max
OL
7
60
CHCX
5
5
VALID
level occurs. I
4337K–USB–04/08
Units
ns
ns
ns
ns
ns
%
OL
/I
OH

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