參數(shù)資料
型號(hào)： SAA7381
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： ATAPI CD-R block decoder
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP144
文件頁(yè)數(shù)： 51/108頁(yè)
文件大?。?/td> 380K
代理商： SAA7381
1997 Aug 12
51
Philips Semiconductors
Objective specification
ATAPI CD-R block decoder
SAA7381
Table 86
Decoding ‘chan’ bits
7.5.7
H
OST INTERFACE
DMA
SPECIAL BITS
Table 87
Decoding bits 7 and 6 of HOSTSUBBLKOFFSETX-H (note 1)
Note
1.
The last Form bit is the LSB of the byte that is situated at offset 12 in the current segment pointed at by
HOSTCURSEG. This is the stored Form byte in the header.
VALUE
DESCRIPTION
00
01
10
11
use extent 0
use extent 0 to 1
use extent 0 to 2
use extent 0 to 3 (see also Section 7.5.8)
BIT
NAME
VALUE
DESCRIPTION
7
autoform
0
1
0
1
unconditional transfer
only transfer if previous Form bit matches bit 6
match last Form bit = 0, perform this transfer if success else reload host registers
match last Form bit = 1, perform this transfer if success else reload host registers
6
form
7.5.8
A
UTOMATIC BLOCK POINTER RELOAD
PROGRAMMING
If either bit 6 or bit 7 are set in the HOSTRELOADFLAGS
register, then when the HOSTRELOADCOUNT register
becomes zero, the value of HOSTCURSEGCNT will be
copied from HOSTNEXTSEGCOUNT and
HOSTRELSEGMENT will be copied from
HOSTNEXTSEG.
This causes the host transfer process to continue looping
over the same region of memory in emulation of the
Chaucer and Sequioia devices.
At the same time one of the bits HOSTRELOADFLAGS
(bits 7 and 6) is reset on reload of the registers. The other
bit retains its value. Therefore:
Single auto-reload is allowed: HOSTRELOADFLAGS
(bits 7 and 6) = 1 0
No auto-reload: HOSTRELOADFLAGS
(bits 7 and 6) = 0 0; pointer can be used as sub-block
extent 3
Multiple auto-reload: HOSTRELOADFLAGS
(bits 7 and 6) = 0 1.
7.5.9
DMA
TRANSFER PROGRAMMING OF THE HOST
INTERFACE
The host interface is optimized for the normal read
commands, handling all data transfers or contiguous data
plus header requests automatically, with auto Form
detection in Mode 2.
If discontinuous data which requires more than
3 sub-block extents e.g. for READ-CD is required then it is
necessary to program the HOSTCURSEG,
HOSTBYTECOUNT and HOSTBYTEOFFSET for each
discontinuous part of each block that is to be transferred.
Writing the value 1 into the ‘hostblock’ will cause the
transfer to take place.
相關(guān)PDF資料
PDF描述
SAA7382GP Error correction and host interface IC for CD-ROM ELM
SAA7382 Error correction and host interface IC for CD-ROM ELM
SAA7390 High performance Compact Disc-Recordable CD-R controller
SAA7390GP High performance Compact Disc-Recordable CD-R controller
SAA7501WP ARD/ZDF NR.3R1 DIGITAL DECODER|LDCC|68PIN|PLASTIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7382 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Error correction and host interface IC for CD-ROM ELM
SAA7382GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Error correction and host interface IC for CD-ROM ELM
SAA7384 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems
SAA7385 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Error correction and host interface IC for CD-ROM SEQUOIA
SAA7385GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Error correction and host interface IC for CD-ROM SEQUOIA
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*