AT91SAM9M10-G45-EK Atmel, AT91SAM9M10-G45-EK Datasheet - Page 212
![KIT EVAL FOR AT91SAMG45/9M10](/photos/9/21/92142/at91sam9m10-g45-ek_sml.jpg)
AT91SAM9M10-G45-EK
Manufacturer Part Number
AT91SAM9M10-G45-EK
Description
KIT EVAL FOR AT91SAMG45/9M10
Manufacturer
Atmel
Series
AT91SAM Smart ARMr
Type
MCUr
Specifications of AT91SAM9M10-G45-EK
Contents
Board, Cables, Power Supply
Processor To Be Evaluated
AT91SAM9M10
Processor Series
AT91SAM9
Data Bus Width
32 bit
Interface Type
RS-232, Ethernet, USB, JTAG
Operating Supply Voltage
5 V
Silicon Manufacturer
Atmel
Core Architecture
AVR
Kit Contents
Board
Features
Two High Speed USB Hosts, LCD TFT Display
Svhc
No SVHC (15-Dec-2010)
Mcu Supported Families
AT91SAM9M10,
Rohs Compliant
Yes
For Use With/related Products
AT91SAM9M10
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM9M10-G45-EK
Manufacturer:
INFINEON
Quantity:
10 000
Company:
Part Number:
AT91SAM9M10-G45-EK
Manufacturer:
Atmel
Quantity:
135
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21.11.3
Figure 21-28. NWAIT Assertion in Write Access: Ready Mode (EXNW_MODE = 11)
6355B–ATARM–21-Jun-10
internally synchronized
NBS0, NBS1,
NBS2, NBS3,
A0,A1
NWAIT signal
Ready Mode
D[31:0]
NWAIT
A
[25:2]
NWE
MCK
NCS
6
In Ready mode (EXNW_MODE = 11), the SMC behaves differently. Normally, the SMC begins
the access by down counting the setup and pulse counters of the read/write controlling signal. In
the last cycle of the pulse phase, the resynchronized NWAIT signal is examined.
If asserted, the SMC suspends the access as shown in
deassertion, the access is completed: the hold step of the access is performed.
This mode must be selected when the external device uses deassertion of the NWAIT signal to
indicate its ability to complete the read or write operation.
If the NWAIT signal is deasserted before the end of the pulse, or asserted after the end of the
pulse of the controlling read/write signal, it has no impact on the access length as shown in
ure
21-29.
4
5
4
3
3
2
1
2
Write cycle
EXNW_MODE = 11 (Ready mode)
WRITE_MODE = 1 (NWE_controlled)
NWE_PULSE = 5
NCS_WR_PULSE = 7
0
1
Wait STATE
0
1
Figure 21-28
0
1
AT91SAM9M10
0
and
Figure
21-29. After
Fig-
212
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