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參數(shù)資料
| 型號(hào)： | TMS34020 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | GRAPHICS PROCESSORS |
| 中文描述： | 圖形處理器 |
| 文件頁(yè)數(shù)： | 43/82頁(yè) |
| 文件大?。?/td> | 1359K |
| 代理商： | TMS34020 |
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TMS34020, TMS34020A
GRAPHICS PROCESSORS
SPVS004D – MARCH 1990 – REVISED NOVEMBER 1993
43
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Q4
Q1
Q2
Q3
Q4*
Q1
Q2
Q3
Q4
Q1
Row
Column
HOE
HDST
LAD
GI
CAMD
RCA
SF
ALACH
RAS
CAS
WE
TR/QE
DDIN
DDOUT
LRDY
SIZE16
PGMD
BUSERR
R0
R1
Previous Read
Valid
Local-Memory Host Read Cycle
HA/HBS
HCS
HREAD
HWRITE
HRDY
DATA
(out)
*See clock stretch, page 21.
NOTE A: HRDY goes high at the start of Q2; however, data is not strobed into the external latches until the start of Q4 by HDST going high.
Figure 20. Host Read Cycle (Random/Same Accesses, not From TMS34020 I/O Registers)
The host-access request is synchronized to the TMS34020 at the beginning of Q4 so that the local memory cycle
can begin in Q1. If the external host-access request occurs after the setup time requirement before Q4, the
request is not considered until the next Q4 cycle. In order to provide back-to-back accesses as indicated in this
example, the host must remove HCS on receipt of HRDY and reassert it before Q4 (it may also remove and
reassert HREAD with HCS).
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相關(guān)代理商/技術(shù)參數(shù) |
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| TMS3450NL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| TMS3637D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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