AT89S8253-24JC Atmel, AT89S8253-24JC Datasheet - Page 11
![IC 8051 MCU FLASH 12K 44PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
AT89S8253-24JC
Manufacturer Part Number
AT89S8253-24JC
Description
IC 8051 MCU FLASH 12K 44PLCC
Manufacturer
Atmel
Series
89Sr
Datasheet
1.AT89S8253-24PU.pdf
(60 pages)
Specifications of AT89S8253-24JC
Core Processor
8051
Core Size
8-Bit
Speed
24MHz
Connectivity
SPI, UART/USART
Peripherals
POR, WDT
Number Of I /o
32
Program Memory Size
12KB (12K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-PLCC
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SPI, UART
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
32
Number Of Timers
3 bit
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
Lead Free Status / Rohs Status
No
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89S8253-24JC
Manufacturer:
ATMEL
Quantity:
5 530
Company:
Part Number:
AT89S8253-24JC
Manufacturer:
ATM
Quantity:
3 290
Company:
Part Number:
AT89S8253-24JC
Manufacturer:
ATMEL
Quantity:
6 988
Part Number:
AT89S8253-24JC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
7. Power-On Reset
Figure 7-1.
7.1
3286P–MICRO–3/10
Min V
Memory Brown-out Protection
BOD Level 2.3V
POR Level 1.4V
CC
WRTINH
Level 2.7V
Internal
RESET
XTAL1
Power-up and Brown-out Detection Sequence
POR
V
0
CC
A Power-On Reset (POR) is generated by an on-chip detection circuit. The detection level is
nominally 1.4V. The POR is activated whenever V
cuit can be used to trigger the start-up reset or to detect a supply voltage failure in devices
without a brown-out detector. The POR circuit ensures that the device is reset from power-on.
When V
how long the device is kept in POR after V
again, without any delay, when V
a cold reset) will set the POF flag in PCON.
The AT89S8253 has an on-chip Brown-out Detection (BOD) circuit for monitoring the V
during operation by comparing it to a fixed trigger level of nominally 2.2V (2.4V max). The pur-
pose of the BOD is to ensure that if V
erased/written at voltages too low for programming. At powerup the V
BOD threshold before execution starts. When V
the WRTINH bit in EECON is activated and futher programming of the Flash/EEPROM is
restricted. When V
ming until after the timeout period has expired in approximately 2 ms. The BOD does not reset
the system as shown in
cution at lower voltages an external BOD circuit may be required.
(2 ms)
t
POR
CC
reaches the Power-on Reset threshold voltage, the POR delay counter determines
2.4V
CC
increases above the trigger level, the BOD delay counter blocks program-
Figure
7-1. To protect the system from errors induced by incorrect exe-
CC
falls below the POR threshold level. A Power-On Reset (i.e.
CC
fails or dips, the Flash or EEPROM memories cannot be
1.2V
CC
rise, nominally 2 ms. The POR signal is activated
CC
CC
decreases to a value below the trigger level,
is below the detection level. The POR cir-
(2 ms)
CC
t
POR
AT89S8253
level must pass the
t
t
t
t
t
CC
level
11