AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 36

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Table 10-2.
36
NCSx Read
NCSx Read
NCSx Write
NCSx Write
NCSx Read
NCSx Read
NCSx Write
NCSx Write
Previous
Access
AT91SAM7A1
Examples
Next Access
NCSx Read
NCSx Write
NCSx Read
NCSx Write
NCSy Read
NCSy Write
NCSy Read
NCSy Write
Data float wait state insertion depends on the previous access.
Table 10-1
Table 10-1.
Illustrations from
description of how data float wait states apply.
Previous Access
TDFx = 0
NCSx Read
NCSx Read
NCSx Write
NCSx Write
NCSx Read
NCSx Read
NCSx Write
NCSx Write
0
0
1
0
1
1
1
1
describes the data float wait states applied between external access cycles.
TDFx = 1
Data Float States Applied
Early Read Mode
0
1
1
0
1
1
1
1
Figure 10-15 on page 37
Next Access
NCSx Read
NCSx Write
NCSx Read
NCSy Read
NCSy Write
NCSy Read
NCSx Write
NCSy Write
TDFx = 2
0
2
1
0
2
2
1
1
TDFx = 3
0
3
1
0
3
3
1
1
Early Read Mode
Max(1, nTDFx)
Max(1, nTDFx)
Number of Data Float Wait States Applied
to
nTDF
TDFx = 0
Figure 10-29 on page 41
0
1
0
1
1
0
0
0
0
1
1
1
1
Standard Read Mode
TDFx = 1
0
1
0
0
1
1
1
1
Standard Read Mode
TDFx = 2
Max(1, nTDFx)
Max(1, nTDFx)
6048B–ATARM–29-Jun-06
0
2
0
0
2
2
1
1
give a complete
nTDF
0
0
0
1
1
TDFx = 3
0
3
0
0
3
3
1
1