參數(shù)資料
型號: 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
文件頁數(shù): 55/92頁
文件大?。?/td> 1458K
代理商: SMJ34020AGB
SMJ34020A
GRAPHICS SYSTEMPROCESSOR
SGUS011B – APRIL 1991 – REVISED AUGUST 1995
55
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
cycle timing examples (continued)
Although RESET is not normallyrequired 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 24). 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
Q1
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q1
Q1
Q1
Q2
Q4
Q1
Q2
Q3
Q4
Q1
Q1
Q1
Q1
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
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 24. Synchronization of Multiple SMJ34020As
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