W83759A Datasheet, PDF (10/41 Pages) Winbond – ADVANCED VL-IDE DISK CONTROLLER

W83759A
Pin Description, continued
SYMBOL PIN
SUSP ,
59
DACK ,
VGAOEH
DMASL ,
60
VGAOEL
/ISDENH
TYPE
I-PU
I/O
-PU
DESCRIPTION
Special Bus Control Interface
This pin is a multi-function input pin.
SUSP : In suspend enable mode, indicates that the W83759A
will enter the suspend state when low and resume operation when
high.
DACK : In DMA transfer enable mode, used to indicate when the
DMA transfer cycle occurs.
VGAOEH: In VGA buffer enable mode, this active low input
controls the input enable for the data transceivers that connect
the ID[15:0] pins to the HD[31:16] pins.
When SYSRST is active, this pin is an input that latches on the
rising edge of SYSRST .
DMASL : This power-on setting pin combines with SUSPEN
(IDD11 power-on setting pin) to determine which mode the
W83759A is in.
DMASL SUSPEN
Mode
1
X
VGA buffer enable
0
1
Suspend enable
0
0
DMA transfer enable
Vcc
GND
41, 65,
91
15, 40,
66, 88,
90
VGAOEL: In VGA buffer enable mode, this active low input
controls the input enable for the data transceivers that connect
the ID[15:0] pins to the HD[15:0] pins.
ISDENH: In DMA transfer enable mode, this output pin controls
the activity of the high byte buffer between IDD[15:8] and
SD[15:8].
+5V power supply
Ground reference
- 10 -