AT89LS8252-12JC Atmel, AT89LS8252-12JC Datasheet - Page 29

• Manufacturer Part Number: AT89LS8252-12JC
• Description: IC MICRO CTRL 12MHZ 44PLCC
• Manufacturer: Atmel
• Series: 89LSr

Specifications of AT89LS8252-12JC

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89LS825212JC

Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
Shift Register Mode Timing Waveforms
AC Testing Input/Output Waveforms
Notes:
0850C–MICRO–3/06
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
1.
AC Inputs during testing are driven at V
for a logic 1 and 0.45V for a logic 0. Timing mea-
surements are made at V
max. for a logic 0.
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
IH
min. for a logic 1 and V
CC
= 2.7V to 6V and Load Capacitance = 80 pF.
CC
- 0.5V
Min
700
1.0
50
12 MHz Oscillator
0
(1)
IL
Float Waveforms
Notes:
Max
700
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 float when a 100 mV change from
the loaded V
10t
2t
CLCL
12t
CLCL
Min
Variable Oscillator
OH
CLCL
0
- 117
/V
(1)
- 133
OL
level occurs.
10t
AT89LS8252
CLCL
Max
- 133
Units
µs
ns
ns
ns
ns
29