SM5907AF Datasheet, PDF (29/30 Pages) Nippon Precision Circuits Inc – compression and non compression type shock-proof memory controller

SM5907AF
Connection example
4M DRAM × 1 or 2 typical connection
Micro-
controller
YMDATA
YMCLK
YMLD
ZSENSE
SM5907
UC1 to UC5
YBLKCK
YFCLK
YFLAG
CD
YSCK
DSP
YLRCK
YSRDATA
D/A
converter
ZSCK
ZLRCK
ZSRDATA
NRAS
NWE
A0 to A9
D0 to D3
NCAS
4M DRAM 1
RAS
WE
A0 to A9
D0 to D3
CAS OE
NRAS
NWE
A0 to A9
D0 to D3
4M DRAM 2
RAS
WE
A0 to A9
D0 to D3
CAS OE
NCAS2
CLK
NRESET
YDMUTE
16M DRAM × 1 or 2 typical connection
Micro-
controller
YMDATA
YMCLK
YMLD
ZSENSE
SM5907
UC1 to UC5
YBLKCK
YFCLK
YFLAG
CD
YSCK
DSP
YLRCK
YSRDATA
D/A
converter
ZSCK
ZLRCK
ZSRDATA
16M DRAM 1
16M DRAM 2
NRAS
NWE
A0 to A10
D0 to D3
NCAS
RAS
WE
A0 to A10
D0 to D3
CAS OE
NRAS _RAS
NWE _WE
A0 to A10
A0 to A10
D0 to D3
D0 to D3
CAS OE
NCAS3
CLK
NRESET
YDMUTE
DRAM OE pin is tied LOW.
In response to the YFLAG input, the 85H command (option settings) should be:
D5: YFLGS =1, D4: YFCKP set to the YFLAG active level.
If YFLAG is active LOW, set YFCKP=0. If YFLAG is active HIGH, set YFCKP=1.
If 4M DRAM × 2 are used, use A10/NCAS2 pin.
If 16M DRAM × 2 are used, use NCAS3 pin.
NIPPON PRECISION CIRCUITS-29