AT89LS52-16JU Atmel, AT89LS52-16JU Datasheet - Page 20

• Manufacturer Part Number: AT89LS52-16JU
• Description: IC MCU 8K FLASH 16MHZ 44-PLCC
• Manufacturer: Atmel
• Series: 89LSr

Specifications of AT89LS52-16JU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 4 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: 256 B
• Interface Type: UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 4 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
• Cpu Family: 89LS
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 16MHz
• Total Internal Ram Size: 256Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 4V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Package: 44PLCC
• Family Name: 89LS
• Maximum Speed: 16 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

16. Power-down Mode
20
AT89LS52
In the Power-down mode, the oscillator is stopped, and the instruction that invokes Power-down
is the last instruction executed. The on-chip RAM and Special Function Registers retain their
values until the Power-down mode is terminated. Exit from Power-down mode can be initiated
either by a hardware reset or by activation of an enabled external interrupt (INT0 or INT1). Reset
redefines the SFRs but does not change the on-chip RAM. The reset should not be activated
before V
the oscillator to restart and stabilize.
Figure 16-1. Oscillator Connections
Note:
Figure 16-2. External Clock Drive Configuration
CC
C1, C2 = 30 pF ± 10 pF for Crystals
is restored to its normal operating level and must be held active long enough to allow
= 40 pF ± 10 pF for Ceramic Resonators
OSCILLATOR
EXTERNAL
SIGNAL
NC
C2
C1
XTAL2
XTAL1
GND
XTAL2
XTAL1
GND
2601C–MICRO–06/08