參數(shù)資料
型號(hào): 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): 54/98頁
文件大?。?/td> 1546K
代理商: SM34020AHTM32
SMJ34020A
GRAPHICS SYSTEM PROCESSOR
SGUS011D -- APRIL 1991 -- REVISED SEPTEMBER 2004
58
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251--1443
cycle timing examples (continued)
Although RESET is not normally required to be synchronous to CLKIN, in order to facilitate synchronization of
multiple SMJ34020As in a system, the rising edge of RESET must meet the setup and hold requirements to
CLKIN so that all GSPs are certain to respond to the RESET on the same quarter cycle (Figure 31). The four
possible conditions for the state of the SMJ34020A at the time RESET goes high are shown below. Quarter cycle
1 is extended accordingly to provide synchronization of the GSPs. All SMJ34020As to be synchronized must
share a common CLKIN and RESET. Within 10 CLKIN cycles after RESET goes high, all GSPs are
synchronized to the same quarter cycle through the extension of Q1 cycles.
It is recommended that SMJ34020A stretch mode not be used in multiprocessor systems.
CLKIN
RESET
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q4
Q1
Q2
Q3
Q4
Q1
Q2
LCLK1
LCLK2
LCLK1
LCLK2
LCLK1
LCLK2
LCLK1
LCLK2
Case 1
Case 2
Case 3
Case 4
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q1
NOTE A: No timing dependencies of LCLK1 and LCLK2 relative to CLKIN or RESET are to be implied from this figure.
Figure 31. Synchronization of Multiple SMJ34020As
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