AT89S8252-24AC Atmel, AT89S8252-24AC Datasheet - Page 30

• Manufacturer Part Number: AT89S8252-24AC
• Description: MCU W/SPI 8KB FLSH 2K EEP 44TQFP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8252-24AC

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• 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): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89S825224AC

Serial Downloading Waveforms
Serial Programming Characteristics
Figure 16. Serial Programming Timing
Table 11. Serial Programming Characteristics, T
30
Symbol
1/t
t
t
t
t
t
CLCL
SHSL
SLSH
OVSH
SHOX
CLCL
AT89S8252
Parameter
Oscillator Frequency
Oscillator Period
SCK Pulse Width High
SCK Pulse Width Low
MOSI Setup to SCK High
MOSI Hold after SCK High
SERIAL CLOCK INPUT
SCK/P1.7
SERIAL DATA INPUT
MOSI/P1.5
MISO/P1.6
SERIAL DATA OUTPUT
MOSI
MISO
SCK
t
OVSH
A
MSB
MSB
= -40°C to 85°C, V
7
t
SHSL
6
5
24 t
24 t
2 t
t
41.6
Min
CLCL
CLCL
0
CLCL
CLCL
4
t
SHOX
CC
3
= 4.0 - 6.0V (Unless Otherwise Noted)
2
t
SLSH
1
Typ
LSB
LSB
0
Max
24
0401G–MICRO–3/06
Units
MHz
ns
ns
ns
ns
ns