AT32UC3A3256S_1 Datasheet, PDF (170/961 Pages) ATMEL Corporation – AVR32 32-Bit Microcontroller

16.3 Block Diagram
Figure 16-1. SMC Block Diagram
H M atrix
SMC
Chip Select
Power
Manager
CLK_SMC
SMC
NCS[5:0]
NRD
N W R 0/N W E
A0/NBS0
N W R 1 /N B S 1
A 1/N W R 2/N B S 2
EBI
Mux Logic
A[23:2]
D[15:0]
N W A IT
I/O
Controller
AT32UC3A3
NCS[5:0]
NRD
NWE0
ADDR[0]
NWE1
ADDR[1]
A D D R [2 3 :2 ]
DATA[15:0]
N W AIT
User Interface
Peripheral Bus
16.4 I/O Lines Description
Table 16-1. I/O Lines Description
Pin Name
Pin Description
NCS[5:0]
Chip Select Lines
NRD
Read Signal
NWR0/NWE
Write 0/Write Enable Signal
A0/NBS0
Address Bit 0/Byte 0 Select Signal
NWR1/NBS1
Write 1/Byte 1 Select Signal
A[25:2]
Address Bus
D[15:0]
Data Bus
NWAIT
External Wait Signal
Type
Output
Output
Output
Output
Output
Output
Input/Output
Input
Active Level
Low
Low
Low
Low
Low
Low
16.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
32072A–AVR32–03/09
170