w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 21

• Manufacturer Part Number: w83c554f
• Description: System I/o Controller With Pci Arbiter & Ultradma/33 Ide Controller
• Manufacturer: Winbond Electronics Corp America

W83C554F
WINBOND ELECTRONICS CORP. AMERICA
Pin Name
DA[2:0]
DD[15:0]
IDECHRDY/
DDMARDY#/
DSTROBE
IDEIRQB
IDEIRQA
Pin #
88,90,89
98,101,103,
105,108,
110,112,
114,115,
113,111,
109,106,
104,102,
100
95
91
92
Table 2-4 (continued). IDE Interface Bus Signals
Input/
Output
Output
Input/
Output
Input
Input
Input
Description
IDE Drive Address for command block and control block of device
(drive).
IDE Drive Data. 16-bit bi-directional bus.
Multi-function pin.
In PIO and Multiword DMA modes: IDE I/O Channel Ready.
When IDECHRDY is negated, the current cycle will be extended.
This input is connected to the primary port, and can also be
connected to the secondary port.
In UltraDMA Read mode: DSTROBE. 554F latches the data from
the device (drive) on the rising and falling edge of DSTROBE.
In UltraDMA Write mode: DDMARDY#. 554F uses this signal,
when negated by the device (drive), to pause the UltraDMA
transaction.
IDE IRQ B. Secondary port interrupt request.
IDE IRQ A. Primary port interrupt request.
Pin Descriptions
19