AT89LP828-AU Atmel, AT89LP828-AU Datasheet - Page 28
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AT89LP828-AU
Manufacturer Part Number
AT89LP828-AU
Description
8-bit Microcontrollers - MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP828-AU.pdf
(149 pages)
Specifications of AT89LP828-AU
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
8051
Data Bus Width
8 bit
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8.2.2
28
AT89LP428/828
Reset Recovery from Power-down
Figure 8-2.
The wake-up from Power-down through an external reset is similar to the interrupt with
PWDEX = “0”. At the falling edge of RST, Power-down is exited, the oscillator is restarted, and
an internal timer begins counting as shown in
propagate to the CPU until after the timer has timed out. The time-out period is controlled by the
Start-up Timer Fuses. (See
clock cycle internal reset is generated when the internal clock restarts. Otherwise, the device will
remain in reset until RST is brought high.
Figure 8-3.
.
Internal
Internal
XTAL1
Reset
Interrupt Recovery from Power-down (PWDEX = 1)
Internal
Reset Recovery from Power-down
Clock
PWD
XTAL1
RST
Clock
PWD
INT1
Table 7-1 on page
Figure
25). If RST returns high before the time-out, a two
8-3. The internal clock will not be allowed to
t SUT
3654A–MICRO–8/09
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