AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 45

• 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 10-3.
Figure 10-35. Read Access Waveform
6048B–ATARM–29-Jun-06
Read
Access
tr
tr
trr
tr
tr
ADDRESS
NOE/NRD
DH
DHZOEL1
DHZCSL
ADHRH
NUB/NLB
DHZOEL2
D[0:15]
NCSx
NWE
CSx
(previous is a write cycle, early read)
(previous is a write cycle, standard
(previous is a write cycle, standard
Timings for Read Access (Continued)
Data Out
Address/CS/NUB/NLB hold time
Data Hi-Z to output enable low
Data Hi-Z to output enable low
Data hold time from address
change/NCS high/NOE high
Data Hi-Z to chip select low
from read high
Description
read)
read)
tr
tr
DHZOEL2
DHZCSL
tr
DHZOEL1
t
t
CYCLE
CYCLE
-1.5ns
1.5ns
2.8ns
4.8ns
0.5 *
0.5 *
tr
Min
OELRDV2 (early)
0
tr
tr
ADCRDV 1/2
tr
BSLRDV 1/2
CSLRDV
Load = 15pf
-
-
Address Valid
tr
OELRDV1 (standard)
Max
t
t
CYCLE
CYCLE
-3.4ns
3.4ns
4.7ns
7.0ns
0.5 *
0.5 *
Min
0
Load = 40pf
-
-
Data In Valid
tr
Max
ADHRH
tr
DH
AT91SAM7A1
t
t
CYCLE
CYCLE
-4.8ns
4.8ns
6.1ns
8.8ns
0.5 *
0.5 *
Min
0
Load = 60pf
-
-
Max
45