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STDL130
5-40
Samsung ASIC
SPSRAMR_HDL
Single-Port Synchronous Static RAM with Redundancy
Parameter Description
SPSRAMR_HDL is the compiler that automatically generates symbol, netlist, timing model, power model
and layout according to the following parameters; Number of words(w), Number of bit per word(b), Column
mux(y) and Number of banks(ba).
Pin Descriptions
Parameters
Ymux(y) = 8
2048
4096
64
4096
8192
128
32
128
1
Ymux(y) = 16
4096
8192
128
8192
16384
256
16
64
1
Ymux(y) = 32
8192
16384
256
16384
32768
512
8
32
1
Words (w)
ba = 1
Min
Max
Step
Min
Max
Step
Min
Max
Step
ba = 2
Bpw (b)
Name
CK
Type
Description
Clock
Clock input. CSN, WEN, A[] and DI[] are latched into the RAM on the rising
edge of CK. If CSN and WEN are low on the rising edge of CK, the RAM is in
write mode. If WEN is high on the rising edge of CK, the RAM is in read mode.
Upon the falling edge of CK, the RAM is in a precharge state.
Chip Enable input. The chip enable is active-low and is latched into the RAM
on the rising edge of CK. When CSN is low, the RAM is enabled for reading or
writing, depending on the state of WEN. When CSN is high, the RAM goes to
the standby mode and is disabled for reading or writing. DOUT remains previ-
ous data output.
Read or write enable input. The read/write enable is latched into the RAM on
the rising edge of CK. When WEN is low, data are written to the addressed
location and DOUT remains stable. When WEN is high, data from the
addressed word are present at DOUT.
Bit-write enable input bus. The bit-write enable is latched into the RAM on the
rising edge of CK. Each bit of BWEN[] enables/disables the write operation of
corresponding data bit. BWEN[i] corresponds to DI[i] in bit-write. If WEN and
BWEN[0] are low and BWEN[1] is high, DI[0] is written into the memory loca-
tion specified on A[], but DI[1] is not written.
Data output enable input. The data output enable is asynchronously operated
regardless of any input. When OEN is high, DOUT is disabled and goes to
high-impedance state.
Address input bus. The address is latched into the RAM on the rising edge of
CK.
Data input bus. Data are latched on the rising edge of CK. Data input is writ-
ten into the addressed location in write mode.
Data output bus. Data output is valid after the rising edge of CK while the
RAM is in read mode. Data output remains previous data output while the
RAM is in write mode.
CSN
Chip Enable
WEN
Read/Write
Enable
BWEN[]
Bit-Write
Enable
OEN
DataOutput
Enable
A[]
Address
DI[]
Data Input
DOUT[]
Data Output