BBK DK1410SI - Function Introduction to SDRAM

112 RD1 InOut DRAM data 1
111 RD2 InOut DRAM data 2
110 RD3 InOut DRAM data 3
109 RD4 InOut DRAM data 4
107 RD5 InOut DRAM data 5
106 RD6 InOut DRAM data 6
105 RD7 InOut DRAM data 7
104 DQM0 InOut Data mask 0
3.5.2 Function introduction to SDRAM
The function of SDRAM (U211) in the player is to save program taken out by MT1389 from FLASH and
information of picture and sound taken out from disc when the player is working to form damping, add the
stability of information output and add anti-vibration of the player. The pin function and real voltage are shown
as the following table:
Pin Name
Data
direction
Function
Voltage
(V)
Pin Name
Data
direction
Function
Voltage
(V)
1 VDD 3.3V power supply 3.18 28 VSS Ground 0.01
2 DQ0 I/O Data bus 0.94 29 MA4 I Address bus 1.65
3 VDDQ I/O 3.3V power supply 3.19 30 MA5 I Address bus 1.74
4 DQ1 I/O Data bus 0.9 31 MA6 I Address bus 1.49
5 DQ2 I/O Data bus 1.3 32 MA7 I Address bus 1.22
6 VSSQ Ground 0 33 MA8 I Address bus 0.05
7 DQ3 I/O Data bus 1.2 34 MA9 I Address bus 0.04
8 DQ4 I/O Data bus 1.5 35 MA11 I Address bus 0.04
9 VDDQ 3.3V power supply 3.18 36 NC Blank pin 0.01
10 DQ5 I/O Data bus 0.7 37 CKE I Clock enable signal 1.22
11 DQ6 I/O Data bus 0.45 38 CLK I System clock input 1.68
12 VSSQ Ground 0 39 UDQM I
Data in/out screen-shielded
signal
2.42
13 DQ7 I/O Data bus 0.8 40 NC Blank pin 0.01
14 VDD 3.3V power supply 3.14 41 VSS Ground 0.01
- 77 -