TMS55160 datasheet(42/67 Pages) TI

Part #	TMS55160

Description	262144 BY 16-BIT MULTIPORT VIDEO RAMS

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Manufacturer	TI [Texas Instruments]

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TMS55160, TMS55161, TMS55170, TMS55171

262144 BY 16-BIT MULTIPORT VIDEO RAMS

SMVS464 – MARCH1996

42

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

PARAMETER MEASUREMENT INFORMATION

RAS

CASx

A0 – A8

WE

DSF

TRG

DQ0 – DQ15

tc(W)

tw(RL)

tw(RH)

td(RLCH)

tt

td(CLRH)

tw(CL)

td(RLCL)

td(CHRL)

th(RA)

tt

th(RLCA)

tsu(CA)

tsu(RA)

th(CLCA)

tw(CH)

1

23

th(SFR)

tsu(SFR)

tsu(SFC)

th(SFC)

tsu(TRG)

tsu(WMR)

tsu(WCH)

tsu(WRH)

th(RLW)

th(CLW)

tsu(WCL)

th(RWM)

tsu(DQR)

tsu(DCL)†

tw(WL)

th(CLD)†

th(RLD)

Row

Column

td(CHRL)

td(CARH)

td(RLCA)

th(RSF)

th(TRG)

td(CACH)

th(RDQ)

† In early-write operations, DQ0 – DQ15 are all latched on the first falling edge of CASx. Thus, tsu(DCL) and th(CLD) are referenced only to the first

falling edge of CASx.

Figure 33. Early-Write-Cycle Timing

Table 7. Early-Write-Cycle State Table

CYCLE

STATE

CYCLE

1

2

3

Write operation (nonmasked)

H

Don’t care

Valid data

Write operation with nonpersistent write-per-bit

L

Write mask

Valid data

Write operation with persistent write-per-bit

L

Don’t care

Valid data

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TMS55160 Datasheet(PDF) 42 Page - Texas Instruments

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