Sharp LC-32LE600E Service Manual page 68

LC-32/40/46LE600E/RU/S (1st Edition)
Pin No. Pin Name
K9 ODT
K7, L7, K3 RAS#, CAS#,
WE#
F3, B3 DM
(UQM3) (DQM1)
or
(UQM2) (DQM3)
L2, L3 BA0, BA1
M8, M3, M7, N2, A [0:12]
N8, N3, N7, P2,
P8, P3, M2, P7,
R2
G8, G2, H7, H3, DQ [0:15]
H1, H9, F1, F9, or
C8, C2, D7, D3, DQ [16:31]
D1, D9, B1, B9
B7, A8, F7, E8 (DQS1), (DQS1#)
(DQS0), (DQS0#)
or
(DQS3), (DQS3#)
(DQS2), (DQS2#)
A2, E2, L1, R3, NC
R7, R8
A1, E1, J9, M9, VDD
R1
A9, C1, C3, C7, VDDQ
C9, E9, G1, G3,
G7, G9
A3, E3, J3, N1, VSS
P9
A7, B2, B8, D2, VSSQ
D8, E7, F2, F8,
H2, H8
J1 VDDL
J7 VSSDL
J2 VREF
I/O
I On Die Termination:
ODT (registered HIGH) enables termination resistance internal to the DDR2 SDRAM.
When enabled, ODT is only applied to each DQ, DQS, DQS#, RDQS, RDQS#, and DM signal for
x4/x8 configuration.
For x16 configuration, ODT is applied to each DQ, UDQS/UDQS#.
LDQS/LDQS#, UDM and LDM signal.
The ODT pin will be ignored if the Extended Mode Register Set (EMRS) is programmed to disable
ODT.
I Command Inputs:
RAS#, CAS# and WE# (along with CS#) define the command being entered.
I Input Data Mask:
DM is an input mask signal for write data. Input data is masked when DM is sampled HIGH coinci-
dent with that input data during a Write access.
DM is sampled on both edges of DQS. Although DM pins are input only, the DM loading matches
the DQ and DQS loading. For x8 device, the function of DM or RDQS/RDQS# is enabled by EMRS
command.
I Bank Address Inputs:
BA0 and BA1 define to which bank an Active, Read, Write or Pre charge command is being
applied.
Bank address also determines if the mode register or extended mode register is to be accessed
during a MRS or EMRS cycle.
I Address Inputs: Provide the row address for Active commands, and the column address and Auto
Pre charge bit for Read/Write commands to select one location out of the memory array in the
respective bank.
A10 is sampled during a pre charge command to determine whether the PRECHARGE applies to
one bank (A10 LOW) or all banks (A10 HIGH).
If only one bank is to be pre charged, the bank is selected by BA0, BA1. The address inputs also
provide the op-code during a Mode Register Set command.
I/O Data Input/Output: Bi-directional data bus.
I/O Data Strobe:
Output with read data, input with write data. Edge-aligned with read data, centered in write data.
For the x16, DQS1 corresponds to the data on DQ0>DQ7; DQS0 corresponds to the data on
DQ8>DQ15.
For the x8, an DQS2 option using DM pin can be enabled via the EMRS (1) to simply read timing.
The data strobes DQS1, DQS0, DQS3, and DQS2 may be used in single ended mode or paired
with optional complementary signals DQS1#, DQS0#, DQS3# and DQS2# to provide differential
pair signaling to the system during both reads and writes. A control bit at EMRS (1) [A10] enables
or disables all complementary data strobe signals.
In this data sheet, "differential DQS signals" refers to any of the following with A10=0 of EMRS (1)
x4 DQS1/DQS1#
x8 DQS1/DQS1# if EMRS (1) [A11] =0
x8 DQS1/DQS1#, DQS2/DQS2#
x16 DQS0/DQS0# and DQS3/DQS3#
— No Connect: No internal electrical connection is present.
Power Supply: +1.8V ± 0.1V.
—
DQ Power Supply: +1.8V ± 0.1V.
—
— Ground.
— Ground. DQ Ground.
DLL Power Supply: +1.8V ± 0.1V.
—
— DLL Ground.
I Reference voltage for inputs for SSTL interface.
6 – 14
Pin Function