參數資料
型號: SM34020AHTM32
廠商: TEXAS INSTRUMENTS INC
元件分類: 圖形處理器
英文描述: GRAPHICS PROCESSOR, CQFP132
封裝: CERAMIC, QFP-132
文件頁數: 24/98頁
文件大?。?/td> 1546K
代理商: SM34020AHTM32
SMJ34020A
GRAPHICS SYSTEM PROCESSOR
SGUS011D -- APRIL 1991 -- REVISED SEPTEMBER 2004
30
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251--1443
cycle timing examples (continued)
The local memory read-modify-write cycle (Figure 12) is used when inserting a field into memory that crosses
byte boundaries. This cycle is actually performed as a read access followed by a page-mode write cycle.
Q4
Q1
Q2
Q3
Q1
Q2
Q3
Q1
Q2
Q3
Q4
Q1
Address
Row
Column
Address Subcycle
Data Transfer
Subcycle
Data Transfer
Subcycle
Data
Data Out
Standard Memory Write Cycle
Page-Mode Write
LCLCK1
LCLCK2
GI
LAD (SMJ34020A)
LAD (Memory)
CAMD
RCA
ALTCH
RAS
CAS
WE
TR/QE
SF
DDIN
DDOUT
LRDY
PGMD
SIZE16
BUSFLT
R0
R1
Q4
Q4
See clock stretch, page 21.
Figure 12. Local-Memory Read-Modify-Write Cycle Timing
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