AMD Elan SC520 - Figure 10-1 SDRAM Controller Block Diagram

SDRAM Controller
10-2 Élan™SC520 Microcontroller User’s Manual
Figure 10-1 SDRAM Controller Block Diagram
Read Buffer
Write Buffer
SDRAM
Address Decode
CPU Interface
MD31–MD0
BA1–BA0
MECC6–MECC0
SDQM3–SDQM0
CLKMEMOUT
CLKMEMIN
SCASB
–SCASA
SRASB–SRASA
SWEB–SWEA
Clock Generator
66 MHz
33 MHz
32 kHz
SCS3–SCS0
MA12–MA0
Controller
Élan™SC520 Microcontroller
33 MHz
32 kHz
32KXTAL2–32KXTAL1
33MXTAL2–33MXTAL1