Samsung DVD-812 Service Manual page 28

2-1-13 ZIC2/ZIC3 (KM416S1120D ; CMOS 16M SDRAM)
Bank Select
CLK
ADD
LCKE
LRAS LCBR
CLK CKE
Pin
CLK System Clock
CS Chip Select
CKE Clock Enable
A ~ A /AP Address
0 10
BA Bank Select Address
RAS Row Address Strobe
CAS Column Address Strobe
WE Write Enable
L(U)DQM Data Input/Output Mask
DQ ~ Data Input/Output
0 15
V /V Power Supply/Ground
DD SS
V /V Data Output Power/Ground
DDQ SSQ
No Connection/
N.C/RFU
Reserved for Future Use
Samsung Electronics
Data Input Register
512K x 16
512K x 16
Column Decoder
Latency & Burst Length
Programming Register
LWE LCAS
Timing Register
CS RAS CAS WE
Name
Active on the positive going edge to sample all inputs.
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and L(U)DQM
Masks system clock to freeze operation from the next clock cycle.
CKE should be enabled at least one cycle prior to new command.
Disable input buffers for power down in standby.
Row / column addresses are multiplexed on the same pins.
Row address : RA
Selects bank to be activated during row address latch time.
Selects bank for read/write during column address latch time.
Latches row addresses on the positive going edge of the CLK with RAS low.
Enables row access & precharge.
Latches column addresses on the positive going edge of the CLK with CAS low.
Enables column access.
Enables write operation and row precharge.
Latches data in starting from CAS, WE active.
Makes data output Hi-Z, t
Blocks data input when L(U)DQM active.
Data inputs/outputs are multiplexed on the same pins.
Power and ground for the input buffers and the core logic.
Isolated power supply and ground for the output buffers to provide improved noise
immunity.
This pin is recommended to be left No Connection on the device.
LWCBR LDQM
L(U)DQM
Input Function
~ RA , column address : CA
0 10
after the clock and masks the output.
SHZ
Reference Information
LWE
V 1
DD
DQ0 2
DQ1 3
LDQM
V 4
SSQ
DQ2 5
DQ3 6
V 7
DDQ
DQ4 8
DQi
DQ5 9
V 10
SSQ
DQ6 11
DQ7 12
V 13
DDQ
LDQM 14
WE 15
CAS 16
RAS 17
CS 18
BA 19
A10/AP 20
A0 21
A1 22
A2 23
A3 24
V 25
DD
~ CA
0 7
50 V
SS
49 DQ15
48 DQ14
47 V
SSQ
46 DQ13
45 DQ12
44 V
DDQ
43 DQ11
42 DQ10
41 V
SSQ
40 DQ9
39 DQ8
38 V
DDQ
37 N.C/RFU
36 UDQM
35 CLK
34 CKE
33 N.C
32 A9
31 A8
30 A7
29 A6
28 A5
27 A4
26 V
SS
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