• 当前位置:
  • 首页
  • >
  • PDF资料
  • >
  • W83877TF PDF文件及第57页内容在线浏览

W83877TF

W83877TF首页预览图
型号: W83877TF
PDF文件:
  • W83877TF PDF文件
  • W83877TF PDF在线浏览
功能描述: WINBOND I/O
PDF文件大小: 968.02 Kbytes
PDF页数: 共154页
制造商: WINBOND[Winbond]
制造商LOGO: WINBOND[Winbond] LOGO
制造商网址: http://www.winbond.com
捡单宝W83877TF
PDF页面索引
120%
W83877TF/W83877TG
-50 -
The contents of DB0-DB7 are buffered (non-inverting) and output to ports PD0-PD7 during a write
operation. The leading edge of
IOW causes an EPP address write cycle to be performed, and the
trailing edge of
IOW latches the data for the duration of the EPP write cycle.
PD0-PD7 ports are read during a read operation. The leading edge of
IOR causes an EPP address
read cycle to be performed and the data to be output to the host CPU.
7.2.5 EPP Data Port 0-3
These four registers are available only in EPP mode. Bit definitions of each data port are as follows:
123456
7
0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
When accesses are made to any EPP data port, the contents of DB0-DB7 are buffered (non-inverting)
and output to the ports PD0-PD7 during a write operation. The leading edge of
IOW causes an EPP
data write cycle to be performed, and the trailing edge of
IOW latches the data for the duration of the
EPP write cycle.
During a read operation, ports PD0-PD7 are read, and the leading edge of IOR causes an EPP read
cycle to be performed and the data to be output to the host CPU.
7.2.6 Bit Map of Parallel Port and EPP Registers
REGISTER 7 6 5 4 3 2 1 0
Data Port (R/W) PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
Status Buffer (Read)
BUSY
A
CK
PE SLCT
ERROR
1 1 TMOUT
Control Swapper
(Read)
1 1 1 IRQEN SLIN
INIT AUTOFD
STROBE
Control Latch (Write) 1 1 DIR IRQ SLIN
INIT AUTOFD
STROBE
EPP Address Port
(R/W)
PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
EPP Data Port 0 (R/W) PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
EPP Data Port 1
(R/W)
PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
EPP Data Port 2 (R/W) PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
EPP Data Port 3 (R/W) PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
购买、咨询产品请填写询价信息:(3分钟左右您将得到回复)
询价型号*数量*批号封装品牌其它要求
删除
删除
删除
删除
删除
增加行数
  •  公司名:
  • *联系人:
  • *邮箱:
  • *电话:
  •  QQ:
  •  微信:

  • 关注官方微信

  • 联系我们
  • 电话:13714778017
  • 周一至周六:9:00-:18:00
  • 在线客服:

天天IC网由深圳市四方好讯科技有限公司独家运营

天天IC网 ( www.ttic.cc ) 版权所有©2014-2023 粤ICP备15059004号

因腾讯功能限制,可能无法唤起QQ临时会话,(点此复制QQ,添加好友),建议您使用TT在线询价。

继续唤起QQ 打开TT询价