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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： | 23/25页 |
| 文件大小： | 158K |
| 代理商： | IP82C237-12 |
4-170
82C237
FIGURE 13. MEMORY-TO-MEMORY TRANSFER
NOTE: For 16-bit mode, 82C237 only. In 8-bit mode this signal is always high impedance three-stated. Waveform shown is for a 16-bit memory-to-memory
transfer. For an 8-bit transfer in 16-bit mode, DWLE will go high at least TASS before the falling edge of ADSTB in S2, then low TAHS after the falling
edge of ADSTB, and will remain low until the next ADSTB where the cycle is repeated.
FIGURE 14. READY
NOTE: READY must not transition during the specified setup and hold times.
Timing Waveforms
(Continued)
S0
(33)
TCLSH
CLK
S11
S12
S13
S14
S21
S22
S23
S24
S11/SI
ADSTB
A0-A7
DB0-DB7
MEMR
MEMW
EOP
EXT EOP
(34)
TCLSL
(7)
TAHS
TFAAB (22)
TASS (11)
TFADB (24)
(5) TAFDB
IN
A8-A15
(16) TDCTR
TFAC (23)
TFAC (23)
ADDRESS VALID
ADDRESS VALID
TAFDB
(5)
(33)
TCLSH
(34)
TCLSL
TWHSH
(60)
TCLSH
(33)
TAFAB
(3)
TAFAC
(4)
TAFAC
(4)
(59) TRHSH
TAHS
(7)
A8-A15
(24)
TFADB
TIDH (26)
TIDS
(27)
TDCL
(15)
TDCL
(15)
TDCTW (17)
TAK(9)
TAHS
(7)
TAK
(9)
OUT
TEPW
(21)
TEPS (20)
(19) TEPH
EXTENDED WRITE
TOVD
(29)
TODH (28)
TAZRL
(64)
TDCL
(15)
TASS
(11)
DWLE
TASS (11)
TAHS
(7)
TASS (11)
TOEV (65)
(SEE NOTE)
CLK
EXTENDED WRITE
(16)
TDCTR
S4
SW
SW
S3
S2
(15)
TDCL
(15)
TDCL
(15)TDCL
(31)TRH
(32)TRS
TRH
(32) TRS
(17)
TDCTW
READ
WRITE
READY
(31)
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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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