w6692 Winbond Electronics Corp America, w6692 Datasheet - Page 50

• Manufacturer Part Number: w6692
• Description: Pci Bus Isdn S/t-controller
• Manufacturer: Winbond Electronics Corp America

Preliminary Data Sheet
W6692 PCI ISDN S/T-Controller
The IO interface can be programmed as simple IO (PCTL:XMODE=0) or 8-bit microprocessor interface (PCTL:XMODE=1).
As simple IOs, the pin data are accessed via XADDR and XDATA registers. The register data is output on the pin if its output
enable bit is set, the read data reflects the current level of pin. In this mode, a maximum of 11 IO ports are supported.
If programmed as 8-bit microprocessor mode, an 8-bit multiplexed bus is used to control peripheral deveces. The address and
data are multiplexed on XAD7-0. XALE is used for address latch and XRDB, XWRB are used for read/write strobe. To access
peripheral device, first write the desired address in XADDR register and then read/write data at XDATA register. In this mode, a
maximum of 256 byte ports can be supported by adding some glue TTLs on board.
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Publication Release Date:
Sep 30, 1999
Revision 0.9