ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 438

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

Figure 27-3.
27.9
27.9.1
27.9.2
438
438
Connection to External Devices
SMC
SAM3X/A
SAM3X/A
Data Bus Width
Byte Write or Byte Select Access
Memory Connections for External Devices
NCS[0] - NCS[7]
A[23:0]
D[15:0]
NWE
NRD
A data bus width of 8 or 16 bits can be selected for each chip select. This option is controlled by
the field DBW in SMC_MODE (Mode Register) for the corresponding chip select.
Figure 27-4
connect a 512K x 16-bit memory on NCS2.
Each chip select with a 16-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.
Figure 27-4.
shows how to connect a 512K x 8-bit memory on NCS2.
Memory Connection for an 8-bit Data Bus
SMC
NCS[2]
A[18:2]
D[7:0]
NWE
NRD
A0
A1
8 or 16
NCS0
NCS1
NCS2
Memory Enable
Output Enable
Write Enable
A[25:0]
D[15:0] or D[7:0]
NCS3
Memory Enable
NCS4
NCS5
Memory Enable
Memory Enable
NCS6
Memory Enable
NCS7
D[7:0]
A[18:2]
Write Enable
Output Enable
Memory Enable
A0
A1
Memory Enable
Memory Enable
Figure 27-5
Memory Enable
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
shows how to