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参数资料
| 型号： | IP82C237-12 |
| 厂商： | INTERSIL CORP |
| 元件分类： | DMA控制器 |
| 英文描述： | CMOS High Performance Programmable DMA Controller |
| 中文描述： | 4 CHANNEL(S), 12.5 MHz, DMA CONTROLLER, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 22/25页 |
| 文件大小： | 158K |
| 代理商： | IP82C237-12 |
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)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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:未知厂家 制造商全称:未知厂家 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: |
| IP82C50A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:UART |
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