TMS55166 datasheet(44/70 Pages) TI

44 / 70 page

TMS55165, TMS55166, TMS55175, TMS55176

262144 BY 16-BIT MULTIPORT VIDEO RAM

SMVS463 – DECEMBER 1995

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

PARAMETER MEASUREMENT INFORMATION

RAS

CAS

A0 – A8

WEx

DSF

TRG

DQ0 – DQ15

tc(W)

tw(RL)

tw(RH)

td(RLCH)

td(CLRH)

tw(CL)

td(CHRL)

th(RA)

th(RLCA)

tsu(CA)

tsu(RA)

th(CLCA)

tw(CH)

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

td(CARH)

td(RLCA)

Block Address†

th(RDQ)

td(RLCL)

td(CHRL)

th(TRG)

td(CACH)

td(RSF)

† For 4-column block write (TMS5516x), block address is A2 – A8; for 8-column block write (TMS5517x), block address is A3 – A8.

Figure 35. Block-Write-Cycle Timing (Early Write)

Table 10. Block-Write-Cycle State Table

CYCLE

STATE

CYCLE

Block-write operation (nonmasked)

Don’t care

Column mask

Block-write operation with nonpersistent write-per-bit

Write mask

Column mask

Block-write operation with persistent write-per-bit

Don’t care

Column mask

TMS55166 Datasheet(PDF) 44 Page - Texas Instruments

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