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Samsung ASIC
5-83
STD150
SRFRAM_HD
High-Density Multi-Port Synchronous Register File
Pin Descriptions
Pin Capacitance
Unit: [SL]
Name
I/O
Description
WCK<nw-1>
Write Clock
Write Clock input on each write port. WEN, WA[] and DI[] are latched into
the RAM on the rising edge of WCK. If WEN is low on the rising edge of
WCK, the RAM is in write mode. If WEN is high on the rising edge of CK,
the RAM is in write standby mode.
Write Enable input on each write port. WEN is latched into the RAM on
the rising edge of WCK.When WEN is low, the write mode is enabled.
When WEN is high, it prevents the write-operation. It is called “write
standby mode”.
Write Address bus on each write port. It specifies the location in which
the data will be written in the write-operation. WA[] is latched at the rising
edge of WCK.
Data Input bus on each write port. It contains data values to be written
into the memory during the write-cycle. DI[] is latched at the rising edge
of WCK.
Read Clock input on each read port. REN and RA[] are latched into the
RAM on the rising edge of RCK. If REN is low on the rising edge of RCK,
the RAM is in read mode. If REN is high on the rising edge of RCK, the
RAM is in read standby mode.
Read Enable input on each read port. REN is latched into the RAM on
the rising edge of RCK. When REN is low, read is enabled. When REN is
high, read is disabled and DOUT[] remains in the previous state. It is
called “read standby mode”
Output Enable input on each read port. The low state enables output
drivers and the high state disables output to go to the Hi-Z state.
WEN<nw-1>
Write Enable
WA<nw-1>[]
Write
Address
DI<nw-1>[]
Data Input
RCK<nr-1>
Read Clock
REN<nr-1>
Read Enable
OEN<nr-1>
Data Output
Enable
Read
Address
Data Output
RA<nr-1>[]
Read Address bus on each read port. It specifies the location to be read
in the read-operation. RA[] is latched at the rising edge of RCK.
Data Output bus on each read port. When REN and OEN are low, it pre-
sents the data word stored in the location specified by RA[] after the ris-
ing edge of RCK. When REN is high and OEN is low, DOUT[] remains in
the previous state. When OEN is high, DOUT[] is in the high-impedance
state regardless of REN.
DOUT<nr-1>[]
WCK
5.84
WEN
2.46
WA
2.46
DI
2.46
RCK
5.84
REN
2.46
OEN
6.00
RA
2.46
DOUT
16.94