T89C51CC02UA-RATIM Atmel, T89C51CC02UA-RATIM Datasheet - Page 21
T89C51CC02UA-RATIM
Manufacturer Part Number
T89C51CC02UA-RATIM
Description
IC 8051 MCU FLASH 16K 32VQFP
Manufacturer
Atmel
Series
AT89C CANr
Datasheets
1.T89C51CC02CA-TDSIM.pdf
(159 pages)
2.T89C51CC02CA-TDSIM.pdf
(33 pages)
3.T89C51CC02CA-TDSIM.pdf
(29 pages)
4.T89C51CC02CA-TDSIM.pdf
(148 pages)
Specifications of T89C51CC02UA-RATIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
20
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
For Use With
AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
T89C51CC02UARATIM
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During a Normal
Operation (Warm Reset)
Watchdog Reset
4126L–CAN–01/08
Table 14. Minimum Reset Capacitor for a 15k Pull-down Resistor
Note:
Reset pin must be maintained for at least 2 machine cycles (24 oscillator clock periods)
to apply a reset sequence during normal operation. The number of clock periods is
mode independent (X2 or X1).
A 1K resistor must be added in series with the capacitor to allow the use of watchdog
reset pulse output on the RST pin or when an external power-supply supervisor is used.
Figure 6 shows the reset circuitry when a capacitor is used.
Figure 6. Reset Circuitry for a Watchdog Configuration
Figure 7 shows the reset circuitry when an external reset circuit is used.
Figure 7. Reset Circuitry Example Using an External Reset Circuit
oscrst/vddrst
External reset
circuit
20ms
These values assume VDD starts from 0v to the nominal value. If the time between two
on/off sequences is too fast, the power-supply decoupling capacitors may not be fully
discharged, leading to a bad reset sequence.
5ms
VDD
Crst
VDD
1k
2.7µF
10µF
1ms
RST
RST pin
1k
Rrst
RST pin
To other on-board circuitry
10ms
4.7µF
15µF
Reset input circuitry
AT/T89C51CC02
Rrst
To other on-board circuitry
Internal reset
watchdog
Reset input circuitry
Internal reset
watchdog
100ms
47µF
47µF
21
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