Hard Disk - Epson SCE8720C Series Hardware Manual

CARD-PCI/GX Hardware Manual

4.2 Hard disk

SCE8720C only supports primary IDE. Up to 2 hard disks, master and slave, can be
controlled. IDE interface complies with ANSI ATA-4 (ultra DMA/33), (Refer to ANSI
ATA-4 for detailed specifications of I.F) Therefore, it can operate in PIO mode 1, 2, 3 or 4,
or Ultra DMA/33. Connection method of HDD is shown below. If secondary IDE is needed,
extend to the ISA bus:
SCE8720C
IDED15～0
IDEA2～0
IDEIOR#
IDEIOW#
IDECS1FX#
IDECS3FX#
IDERDY
IDEINT(IRQ14)
IDEDRQ
IDEACK#
IDERESET#
Each signal of IDE can be directly connected to IDE with no problem. However, it is
sometimes better to add serial dumping resistances of 33Ω or so in order for
countermeasure against noises.
Output level of each IDE signal is 3.3V, and input level is 5V-tolerant. No pull-up or pull-
down is required.
40
Figure 4.1 IDE interface connection
EPSON
IDE
D15～0
A2～0
IOR#
IOW#
CS1FX#
CS3FX#
RDY
INT(IRQ14)
DRQ
DACK#
RESET#
Rev.A