AT91CAP7E-NA-ZJ Atmel, AT91CAP7E-NA-ZJ Datasheet - Page 147
![MCU CAP7 FPGA 225LFBGA](/photos/12/32/123241/225-lfbga_sml.jpg)
AT91CAP7E-NA-ZJ
Manufacturer Part Number
AT91CAP7E-NA-ZJ
Description
MCU CAP7 FPGA 225LFBGA
Manufacturer
Atmel
Series
CAP™r
Specifications of AT91CAP7E-NA-ZJ
Core Processor
ARM7
Core Size
16/32-Bit
Speed
80MHz
Connectivity
EBI/EMI, FPGA, IrDA, SPI, UART/USART, USB
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
256KB (256K x 8)
Program Memory Type
ROM
Ram Size
160K x 8
Voltage - Supply (vcc/vdd)
1.08 V ~ 1.32 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
225-LFBGA
Processor Series
AT91Mx
Core
ARM7TDMI
Data Bus Width
32 bit
3rd Party Development Tools
JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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Figure 21-16. Chip Select Wait State between a Read Access on NCS0 and a Write Access on NCS2
21.9.2
8549A–CAP–10/08
Early Read Wait State
NBS0, NBS1,
NBS2, NBS3,
A0,A1
A[25:2]
D[31:0]
NCS0
NCS2
NWE
MCK
NRD
In some cases, the SMC inserts a wait state cycle between a write access and a read access to
allow time for the write cycle to end before the subsequent read cycle begins. This wait state is
not generated in addition to a chip select wait state. The early read cycle thus only occurs
between a write and read access to the same memory device (same chip select).
An early read wait state is automatically inserted if at least one of the following conditions is
valid:
• if the write controlling signal has no hold time and the read controlling signal has no setup
• in NCS write controlled mode (WRITE_MODE = 0), if there is no hold timing on the NCS
• in NWE controlled mode (WRITE_MODE = 1) and if there is no hold timing (NWE_HOLD =
time
signal and the NCS_RD_SETUP parameter is set to 0, regardless of the read mode
21-18). The write operation must end with a NCS rising edge. Without an Early Read Wait
State, the write operation could not complete properly.
0), the feedback of the write control signal is used to control address, data, chip select and
byte select lines. If the external write control signal is not inactivated as expected due to load
capacitances, an Early Read Wait State is inserted and address, data and control signals are
maintained one more cycle. See
(Figure
NRD_CYCLE
21-17).
Read to Write
Wait State
Figure
21-19.
Chip Select
Wait State
NWE_CYCLE
AT91CAP7E
(Figure
147
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