參數(shù)資料
型號(hào)： IP82C237
廠商： HARRIS SEMICONDUCTOR
元件分類： DMA控制器
英文描述： CMOS High Performance Programmable DMA Controller
中文描述： 4 CHANNEL(S), 8 MHz, DMA CONTROLLER, PDIP40
文件頁(yè)數(shù)： 22/25頁(yè)
文件大小： 158K
代理商： IP82C237
4-169
82C237
FIGURE 12. DMA TRANSFER
NOTE: For 16-bit mode, 82C237 only. In 8-bit mode this signal is always high impedance three-stated. Waveform shown is for an 8-bit transfer
with the 82C237 programmed in 16-bit mode. For a 16-bit transfer, DWLE will go low at least TASS before the falling edge of ADSTB in S2,
and remain low for the entire transfer.
Timing Waveforms
(Continued)
TEPW (21)
TAK (9)
SI
SI
TQS
(30)
S0
S0
S1
S2
S3
S4
S2
S3
S4
SI
SI
SI
TDQ
(18)
THS
(25)
TAEL
(1)
TCLSH
(33)
TQS
(30)
TCL (13)
TCY
(14)
TCH
(12)
TDQ
(18)
TAET
(2)
TSHSL
(37)
TCLSL
(34)
TEPS
(20)
TEPH
(19)
TRHAL
(58)
TAK (9)
TAFAB (3)
TAHW (8)
TAHR (6)
TRHDI (63)
TAFC (4)
TDCTR (16)
(56)
(15)
TRLRH
(36)
CLK
DREQ
HRQ
HLDA
AEN
ADSTB
DB0-DB7
A0-A7
DACK
READ
WRITE
INT EOP
EXT EOP
(64)
TAZRL
TAFDB
(5)
TFAAB
(22)
TFADB
(24)
TASS
(11)
TAHS
(7)
A8-A15
TAK
(9)
TDCL
(15)
TFAC
(23)
TDCL (15)
TDVWL
(62)
TWLWHA
(38)
TDCTW
(17)
TAVWL
(57)
TDVAL (61)
(FOR EXTENDED WRITE)
(FOR EXTENDED WRITE)
TAK (9)
TDCL
(15)
TWLWH (39)
TDCTW (17)
TWRRD
(35)
TAVRL
TDCTR
(16)
TAHR
(6)
TAHW
(8)
ADDRESS VALID
TASM
(10)
ADDRESS VALID
TAHS
(7)
TASS
(11)
DWLE
(SEE NOTE)
相關(guān)PDF資料
PDF描述
IP82C237-12 CMOS High Performance Programmable DMA Controller
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IP82C237-12 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS High Performance Programmable DMA Controller
IP82C37A 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:
IP82C37A/+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DMA Controller
IP82C37A-12 制造商:Rochester Electronics LLC 功能描述:- Bulk
IP82C37A-5 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:
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