AT91FR40162SB-CU-999 Atmel, AT91FR40162SB-CU-999 Datasheet - Page 24

• Manufacturer Part Number: AT91FR40162SB-CU-999
• Description: IC MCU 32BIT RISC 121BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91FR40162SB-CU-999

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 75MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 2MB (1M x 16)
• Program Memory Type: FLASH
• Ram Size: 256K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 121-BGA
• Data Bus Width: 32 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

11.3
Figure 11-3. Memory Connections for Eight External Devices
24
Chip Select Lines
AT91FR40162SB
EBI
NCS0 - NCS3
CS4 - CS7
D0 - D15
A0 - A19
NWRx
NRD
The EBI provides up to eight chip select lines:
By exchanging address lines for chip select lines, the user can optimize the EBI to suit the exter-
nal memory requirements: more external devices or larger address range for each device.
The selection is controlled by the ALE field in EBI_MCR (Memory Control Register). The follow-
ing combinations are possible:
Figure 11-2. Memory Connections for Four External Devices
Note:
Note:
• Chip select lines NCS0 - NCS3 are dedicated to the EBI (not multiplexed).
• Chip select lines CS4 - CS7 are multiplexed with the top four address lines A23 - A20.
A20, A21, A22, A23 (configuration by default)
A20, A21, A22, CS4
A20, A21, CS5, CS4
A20, CS6, CS5, CS4
CS7, CS6, CS5, CS4
EBI
For four external devices, the maximum address space per device is 16M bytes.
For eight external devices, the maximum address space per device is 1M byte.
NCS0 - NCS3
D0 - D15
A0 - A23
NWRx
NRD
8 or 16
NCS0
NCS1
NCS2
D0 - D15 or D0 - D7
Memory Enable
Output Enable
Write Enable
A0 - A19
NCS3
Memory Enable
CS4
Memory Enable
CS5
8 or 16
Memory Enable
NCS0
CS6
Memory Enable
NCS1
CS7
NCS2
Memory Enable
D0 - D15 or D0 - D7
NCS3
Memory Enable
Output Enable
Write Enable
A0 - A23
Memory Enable
Memory Enable
Memory Enable
Memory Enable
Memory Enable
6410B–ATARM–12-Jan-10