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

• Manufacturer Part Number: AT89LS52-16PC
• Description: IC MCU 8K FLASH LV 16MHZ 40-DIP
• Manufacturer: Atmel
• Series: 89LSr

Specifications of AT89LS52-16PC

• 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: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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