W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 17

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
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5.1.3
Overview :
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Block Diagram :
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Features :
Related Pins :
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Operation Modes :
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5.1.4
Overview :
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Block Diagram :
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Features :
- Compatible (centronic) mode (forward channel)
- Nibble mode (reverse channel, compatible with all existing PC hosts - relies on software control)
- Byte mode (reverse channel, compatible with IBM PS/2 host)
- EPP mode (bi-directional half-duplex channel - relies on software control)
- ECP mode (fast bi-directional half-duplex channel)
- High performance half-duplex forward and reverse channel
supports "long framing" and "short framing" (synchronous, frame-based protocol)
provides "master mode" and "slave mode"
build-in two 48x16 (or 24x32) data fifo to accelerate transmit/receive operation
programable data bits per one frame (sampling rate) : 1 ~ 256 bits/frame
programable data bits per word (resolution of each sampling) : 1 ~ 32 bits/word
programable multi-word (per frame) transfer : 1 ~ 16 words/frame
supports all IEEE P1284 transfer modes including :
Host-side design
Provide a special operation mode to emulate peripheral-side centronic device
Build-in one 16bytes FIFO to accelerate ECP mode and centronic forward transfer
Provide DMA capability to accelerate moving data from parallel port interface to system memory
ECP mode is also including :
PARALLEL PORT INTERFACE
PCI BRIDGE
W90220F
Version 0.84