AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 348

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

19.5
19.5.1
Figure 19-2. SDRAM Controller Connections to SDRAM Devices: 16-bit Data Bus Width
19.5.2
9166C–AVR-08/11
Application Example
Hardware Interface
Software Interface
Controller
SDRAM
SDRAMC_A[0-12]
DQM[0-1]
SDCKE
D0-D31
SDWE
SDCK
SDCS
RAS
CAS
BA0
BA1
Table 19-1.
Figure 19-2 on page 348
bus width. It is important to note that this example is given for a direct connection of the devices
to the SDRAMC, without External Bus Interface or I/O Controller multiplexing.
The SDRAM address space is organized into banks, rows, and columns. The SDRAMC allows
mapping different memory types according to the values set in the SDRAMC Configuration Reg-
ister (CR).
The SDRAMC’s function is to make the SDRAM device access protocol transparent to the user.
Table 19-2 on page 349
ping seen by the user in correlation with the device structure. Various configurations are
illustrated.
Name
DQM[1:0]
SDRAMC_A[12:0]
D[15:0]
I/O Lines Description
DQM0
D0-D7
D0-D7
CS
CLK
CKE
WE
RAS
CAS
DQM
SDRAM
2Mx8
Description
Data Mask Enable Signals
Address Bus
Data Bus
to
A0-A9 A11
shows an example of SDRAM device connection using a 16-bit data
Table 19-4 on page 349
BA0
BA1
A10
SDRAMC_A10
BA1
BA0
illustrate the SDRAM device memory map-
D8-D15
DQM1
D0-D7
CS
CLK
CKE
WE
RAS
CAS
DQM
SDRAM
2Mx8
Type
Output
Output
Input/Output
A0-A9 A11
A10
BA0
BA1
SDRAMC_A10
BA1
BA0
AT32UC3C
Active Level
High
348