User manual

ATHENA CPU User Manual V1.40 Page 14
4.7 Watchdog Features – J6
1 Ground
2 WDI
3 WDO
Table 7: J6 – Watchdog Connector Pinout
J6 is used for watchdog timer access.
The watchdog timer circuit is described on page 66 of this manual. It may be programmed
directly, as described in this user manual, or with Diamond Systems’ Universal Driver software.
4.8 IDE Drive – J8
RESET- 1 2 Ground
D7 3 4 D8
D6 5 6 D9
D5 7 8 D10
D4 9 10 D11
D3 11 12 D12
D2 13 14 D13
D1 15 16 D14
D0 17 18 D15
Ground 19 20 Key (Not Used)
DRQ 21 22 Ground
IDEIOW- 23 24 Ground
IDEIOR- 25 26 Ground
IORDY 27 28 Ground
DACK- 29 30 Ground
IRQ14 31 32 Pulled low for 16-bit operation
A1 33 34 Not Used
A0 35 36 A2
CS0- 37 38 CS1-
LED- 39 40 Ground
+5V 41 42 +5V
Ground 43 44 Not Used
Table 8: J8 – IDE Drive Connector Pinout
J8 is a 2x22 (44-pin) 2mm-pitch pin header. It mates with Diamond Systems’ cable no. 698004,
and may be used to connect up to 2 IDE drives (hard disks, CD-ROMs, or flashdisk modules).
The 44-pin connector includes power and mates directly with notebook drives and flashdisk
modules. To use a standard format hard disk or CD-ROM drive with a 40-pin connector, an
adapter PCB such as Diamond Systems’ ACC-IDEEXT is required.