Pin Description - Philips CEM3000B Service Manual

1 Semiconductor

PIN DESCRIPTION

CLK Fetches all inputs at the "H" edge.
Disables or enables device operation by asserting or deactivating all inputs except CLK, CKE,
CS
UDQM and LDQM.
Masks system clock to deactivate the subsequent CLK operation.
CKE If CKE is deactivated, system clock will be masked so that the subsequent CLK operation is
deactivated. CKE should be asserted at least one cycle prior to a new command.
Row & column multiplexed.
Address Row address
Column Address
Slects bank to be activated during row address latch time and selects bank for precharge and
A11
read/write during column address latch time. A11="L" : Bank A, A11="H" : Bank B
RAS
CAS
Functionality depends on the combination. For details, see the function truth table.
WE
Masks the read data of two clocks later when UDQM and LDQM are set "H" at the "H" edge of the
UDQM,
clock signal. Masks the write data of the same clock when UDQM and LDQM are set "H" at the "H"
LDQM
edge of the clock signal. UDQM controls upper byte and LDQM controls lower byte.
DQi Data inputs/outputs are multiplexed on the same pin.
: RA0 – RA10
: CA0 – CA7
FEDD56V16160F-02
MSM56V16160F
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