at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 197
at91sam9263
Manufacturer Part Number
at91sam9263
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9263.pdf
(1065 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
at91sam9263-CJ
Manufacturer:
ATMEL
Quantity:
181
Company:
Part Number:
at91sam9263-EK
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
at91sam9263B-CU
Manufacturer:
IDT
Quantity:
1 043
Part Number:
at91sam9263B-CU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
at91sam9263B-CU-100
Manufacturer:
ATMEL
Quantity:
1 000
- Current page: 197 of 1065
- Download datasheet (16Mb)
21.6
Figure 21-2.
21.7
21.7.1
21.7.2
6249D–ATARM–20-Dec-07
External Memory Mapping
Connection to External Devices
Data Bus Width
Byte Write or Byte Select Access
SMC
Memory Connections for Eight External Devices
NCS[0] - NCS[7]
D[31:0]
A[25:0]
NWE
NRD
The SMC provides up to 26 address lines, A[25:0]. This allows each chip select line to address
up to 64 Mbytes of memory.
If the physical memory device connected on one chip select is smaller than 64 Mbytes, it wraps
around and appears to be repeated within this space. The SMC correctly handles any valid
access to the memory device within the page (see
A[25:0] is only significant for 8-bit memory, A[25:1] is used for 16-bit memory, A[25:2] is used for
32-bit memory.
A data bus width of 8, 16, or 32 bits can be selected for each chip select. This option is con-
trolled by the field DBW in SMC_MODE (Mode Register) for the corresponding chip select.
Figure 21-3
connect a 512K x 16-bit memory on NCS2.
as a single 32-bit memory
Each chip select with a 16-bit or 32-bit data bus can operate with one of two different types of
write access: byte write or byte select access. This is controlled by the BAT field of the
SMC_MODE register for the corresponding chip select.
shows how to connect a 512K x 8-bit memory on NCS2.
8 or 16 or 32
NCS0
NCS1
Figure 21-5
AT91SAM9263 Preliminary
NCS2
A[25:0]
Memory Enable
Output Enable
Write Enable
D[31:0] or D[15:0] or
D[7:0]
NCS3
Memory Enable
Figure
NCS4
Memory Enable
NCS5
shows two 16-bit memories connected
NCS6
Memory Enable
21-1).
NCS7
Memory Enable
Memory Enable
Memory Enable
Figure 21-4
Memory Enable
shows how to
197
Related parts for at91sam9263
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
AT91SAM ARM-based Flash MCU
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
At91sam Arm-based Flash Mcu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Flash Mcu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM THUMB-BASED MICROCONTROLLERS
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 MEMORY EXTENSION CARD
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
AT91 ARM X40 SERIES EVAL KIT
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
AT91 ARM Cortex M3-based Processor
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet: