參數(shù)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(shù): 32/98頁
文件大?。?/td> 1546K
代理商: SM34020AHTM32
SMJ34020A
GRAPHICS SYSTEM PROCESSOR
SGUS011D -- APRIL 1991 -- REVISED SEPTEMBER 2004
38
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251--1443
cycle timing examples (continued)
The clock stretch is generated by the VLCOL instruction and is indicated by CAS,WE,TR/QE, and SF high
at the falling edge of RAS and SF high at the falling edge of CAS (Figure 17). The data in the COLOR1 register
is output on LAD to be written to a special register on the VRAM that is used in subsequent cycles requiring a
color latch. During the address portion of the cycle, the status on LAD0--LAD3 indicates a color-mask load is
being performed (status code = 0111). Although CAMD, PGMD, and SIZE16 are ignored on this cycle, they
should be held at valid levels as shown.
Q4
Q1
Q2
Q3
Q1
Q2
Q3
Q4
Q1
All-Zero Address
Zero Address
Color Register Data
GI
LAD
CAMD
RCA
ALTCH
RAS
CAS
WE
TR/QE
SF
DDIN
DDOUT
LRDY
PGMD
SIZE16
BUSFLT
R0
R1
Q4
See clock stretch, page 21.
Figure 17. Load-Color-Latch-Cycle Timing
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