AT89LS51 Atmel Corporation, AT89LS51 Datasheet - Page 21

• Manufacturer Part Number: AT89LS51
• Manufacturer: Atmel Corporation

Specifications of AT89LS51

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 16 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Uart: 1
• Sram (kbytes): 0.125
• Operating Voltage (vcc): 2.7 to 4.0
• Timers: 2
• Isp: SPI
• Watchdog: Yes

20. Serial Programming Characteristics
Figure 20-1. Serial Programming Timing
Table 20-1.
21. Absolute Maximum Ratings*
3053C–MICRO–6/08
Symbol
1/t
t
t
t
t
t
t
t
t
Operating Temperature.................................. -55°C to +125°C
Storage Temperature ..................................... -65°C to +150°C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage ............................................ 6.6V
DC Output Current...................................................... 15.0 mA
CLCL
SHSL
SLSH
OVSH
SHOX
SLIV
ERASE
SWC
CLCL
Parameter
Oscillator Frequency
Oscillator Period
SCK Pulse Width High
SCK Pulse Width Low
MOSI Setup to SCK High
MOSI Hold after SCK High
SCK Low to MISO Valid
Chip Erase Instruction Cycle Time
Serial Byte Write Cycle Time
Serial Programming Characteristics, T
MOSI
MISO
SCK
t
OVSH
A
t
= -40⋅ C to 85⋅ C, V
SHSL
8 t
2 t
8 t
t
62.5
Min
CLCL
*NOTICE:
10
CLCL
CLCL
CLCL
3
t
SHOX
CC
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
= 2.7V - 4.0V (Unless Otherwise Noted)
t
SLSH
Typ
16
t
SLIV
64 t
CLCL
Max
500
16
32
+ 400
AT89LS51
Units
MHz
ms
ns
ns
ns
ns
ns
ns
µs
21