Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
441
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
Figure 26-1.
Memory Connections for Four External Devices
26.6
Connection to External Devices
26.6.1 Data Bus Width
The data bus width is 8 bits.
shows how to connect a 512K x 8-bit memory on NCS0.
Figure 26-2.
Memory Connection for an 8-bit Data Bus
26.6.1.1 NAND Flash Support
The SMC integrates circuitry that interfaces to NAND Flash devices.
The NAND Flash logic is driven by the Static Memory Controller. It depends on the programming of the
The NAND Flash logic is driven by the Static Memory Controller. It depends on the programming of the
SMC_NFCSx field in the CCFG_SMCNFCS Register on the Bus Matrix User Interface. For details on this register,
refer to the Bus Matrix User Interface section. Access to an external NAND Flash device via the address space
reserved to the chip select programmed.
The user can connect up to 4 NAND Flash devices with separated chip select.
The NAND Flash logic drives the read and write command signals of the SMC on the NANDOE and NANDWE
The user can connect up to 4 NAND Flash devices with separated chip select.
The NAND Flash logic drives the read and write command signals of the SMC on the NANDOE and NANDWE
signals when the NCSx programmed is active. NANDOE and NANDWE are disabled as soon as the transfer
address fails to lie in the NCSx programmed address space.
NRD
NWE
A[23:0]
D[7:0]
8
Memory Enable
Memory Enable
Memory Enable
Memory Enable
Output Enable
Write Enable
A[23:0]
D[7:0]
NCS3
NCS0
NCS1
NCS2
NCS[0] - NCS[3]
SMC
24
SMC
NWE
NRD
NCS[0]
Write Enable
Output Enable
Memory Enable
D[7:0]
D[7:0]
A[18:0]
A[18:0]