參數(shù)資料
型號(hào)： SMJ34020AGB
廠商： Texas Instruments, Inc.
英文描述： GRAPHICS SYSTEM PROCESSOR
中文描述： 圖形系統(tǒng)處理器
文件頁(yè)數(shù)： 28/92頁(yè)
文件大?。?/td> 1458K
代理商： SMJ34020AGB
SMJ34020A
GRAPHICS SYSTEMPROCESSOR
SGUS011B – APRIL 1991 – REVISED AUGUST 1995
28
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
cycle timing examples (continued)
The local memory read-modify-write cycle (Figure 5) 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 20.
Figure 5. Local-Memory Read-Modify-Write-Cycle Timing
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