AT90S1200-4PI Atmel, AT90S1200-4PI Datasheet - Page 13
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AT90S1200-4PI
Manufacturer Part Number
AT90S1200-4PI
Description
IC MCU 1K FLSH 4MHZ LV IT 20DIP
Manufacturer
Atmel
Series
AVR® 90Sr
Datasheet
1.AT90S1200-12PC.pdf
(71 pages)
Specifications of AT90S1200-4PI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI
Peripherals
POR, WDT
Number Of I /o
15
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Ram Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90S1200-4PI
Manufacturer:
ATM
Quantity:
8 000
Company:
Part Number:
AT90S1200-4PI
Manufacturer:
ATM
Quantity:
8 000
Power-on Reset
0838H–AVR–03/02
Figure 13. Reset Logic
Table 3. Reset Characteristics (V
Note:
A Power-on Reset (POR) circuit ensures that the device is reset from power-on. As
shown in Figure 13, an internal timer clocked from the Watchdog timer oscillator pre-
vents the MCU from starting until after a certain period after V
on Threshold voltage (V
Figure 14. MCU Start-up, RESET Tied to V
If the built-in start-up delay is sufficient, RESET can be connected to V
an external pull-up resistor. By holding the RESET pin low for a period after V
Symbol
V
V
t
t
INTERNAL
TIME-OUT
POR
TOUT
POT
RST
RESET
RESET
RESET
V
(1)
CC
VCC
1. The Power-on Reset will not work unless the supply voltage has been below V
(falling).
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
Pin Threshold Voltage
Power-on Reset Period
Reset Delay Time-out Period (The Time-out
period equals 16K WDT cycles. See “Typical
Characteristics” on page 51. for typical WDT
frequency at different voltages).
100 - 500K
Power-on Reset
RC Oscillator
Reset Circuit
Watchdog
On-chip
Timer
Circuit
POT
V
V
POT
RST
), regardless of the V
t
TOUT
CC
POR
= 5.0V)
14-stage Ripple Counter
CC
.
CC
rise time (see Figure 14).
11.0
Min
0.8
0.2
2.0
–
Time-out
CC
16.0
Typ
1.2
0.4
3.0
has reached the Power-
–
AT90S1200
0.85 V
S
R
CC
Max
21.0
1.6
0.6
4.0
directly or via
CC
Q
Q
CC
Units
ms
ms
V
V
V
has
POT
13