LC78616PE Datasheet, PDF (20/26 Pages) ON Semiconductor – Compact Disc Player IC

LC78616PE
SDRAM Interface
(1) Required specification for external SDRAM
Memory size : 16M-bit or 64M-bit
Data width : 16-bit
CAS latency : 2
Burst length : Full
(2) Interface pins to external SDRAM
Pin Name
SDDAT15
to SDDAT00
SDADRS10
to SDADRS00
Function at 16M-bit SDRAM
Function at 64M-bit SDRAM
Data Input/Output (16-bit)
Data Input/Output (16-bit)
Address Output (11-bit)
Address Output (11-bit)
Signal name in Figure
12-1, 2, 3
DDAT[15:0]
DDAT[15:0]
DADD[10:0]
DADD[10:0]
SDADRS11
SDADRS12
SDBA
SDDQM
SDCSB
SDRASB
SDCASB
SDWEB
SDCKE
SDCLK
Not used *1
Not used *2
Bank Output
DQMH/DQML
(UDQM/LDQM) Output
*3
CSB Output
RASB Output
CASB Output
WEB Output
Clock Enable Output
Clock Output
Address(A11) Output
Address(A12) or Bank0 Output
Bank or Bank1 Output
DQMH/DQML
(UDQM/LDQM) Output
*3
CSB Output
RASB Output
CASB Output
WEB Output
Clock Enable Output
Clock Output

DADD[11]

DADD[12]
DADD[11]
DADD[13]
SDDQM
SDDQM
SDCSB
SDCSB
SDRASB
SDRASB
SDCASB
SDCASB
SDWEB
SDWEB
SDCKE
SDCKE
SDCLK
SDCLK
<Notes>
*1. SDADRS11 in 16M-bit SDRAM using mode can be used as CONT06 pin.
*2. SDADRS12 in 16M-bit SDRAM using mode can be used as CONT07 pin.
*3. The SDRAM access data width of this IC is sixteen bits. Therefore, connect the SDDQM of this IC to both the
DQMH(UDQM) and DQML(LDQM) pins of SDRAM.
*4. The all pins used for SDRAM interface are input pin mode and internal pull down resistor on mode in initial condition after
reset of this IC. All the resistors will be off when the SDRAM use mode is set to be ON.
*5. Some signals used in Figure 12-1 to Figure 12-3 use different pins according to the using SDRAM. The signal name in Figure
12-1 to Figure 12-3 for the actual pin is shown at the most right column in above table.
Upper step : Signal name in 16M-bit SDRAM using mode
Lower step : Signal name in 64M-bit SDRAM using mode
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