AT91M43300-25CI Atmel, AT91M43300-25CI Datasheet - Page 14

• Manufacturer Part Number: AT91M43300-25CI
• Description: IC ARM7 MCU 144 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M43300-25CI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: WDT
• Number Of I /o: 58
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Watchdog Timer Signals
Table 19. Watchdog Timer Outputs
Figure 7. Watchdog Signals Relative to MCKI
Reset Signals
Certain setup constraints must be met. These constraints are shown in Table 20 and are represented in Figure 8.
Table 20. Reset Setup Constraints
A minimum pulse width is necessary as shown in Table 21 and as represented in Figure 8.
Table 21. Reset Minimum Pulse-width
Figure 8. Reset Signals Relative to MCKI
Only the NRST rising edge is synchronized. The falling edge is asynchronous.
14
Symbol
WD
WD
Symbol
RST
Symbol
RST
AT91M63200/M43300
1
2
1
3
NRST
NWDOVF Output
MCKI
Parameter
MCKI Rising to NWDOVF Rising
MCKI Rising to NWDOVF Falling
Parameter
NRST Minimum Pulse-width
MCKI
Parameter
NRST Rising Related to MCKI Rising
Z
WD
1
RST
3
RST
1H
Core at 2V
TBD
TBD
WD
Maximum
Core at 2V
2
TBD
RST
Core at 3.3V
1S
Setup
Pulse-width
20
20
10(t
Z
Core at 3.3V
CP
)
5
Units
ns
Units
Units
ns
ns