AT91M40800-33AI SL383 Atmel, AT91M40800-33AI SL383 Datasheet - Page 31

• Manufacturer Part Number: AT91M40800-33AI SL383
• Description: IC ARM MCU 16BIT 100TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M40800-33AI SL383

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: AT91M4080033AISL3

External Wait
1354D–ATARM–08/02
Figure 19. Data Float Output Time
Notes:
The NWAIT input can be used to add wait states at any time. NWAIT is active low and is
detected on the rising edge of the clock.
If NWAIT is low at the rising edge of the clock, the EBI adds a wait state and changes
neither the output signals nor its internal counters and state. When NWAIT is de-
asserted, the EBI finishes the access sequence.
The NWAIT signal must meet setup and hold requirements on the rising edge of the
clock.
Figure 20. External Wait
Notes:
1. Early Read Protocol
2. Standard Read Protocol
1. Early Read Protocol
2. Standard Read Protocol
NWAIT
ADDR
NWE
MCK
NRD
D0 - D15
NCS
ADDR
NCS
MCK
NRD
(1)
(1)
(2)
(2)
AT91X40 Series
t
DF
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