ADLINK PCI-7396 - Manual (Page 29)

Registers Format
• 21
3.8 Interrupt Source Control (ISC) Register
The PCI-7396 has a dual interrupt system, two interrupt sources can be
generated and be distinguished by software setting. This register is used to
select the interrupt sources.
Address: BASE + 50h
Attribute: write only
Data Format:
Bit 7 6 5 4 3 2 1 0
BASE+50h x x x x C2_
1 C2_
0 C1_
1 C1_
0
BASE+51h x x x x x x x x
BASE+52h x x x x x x x x
BASE+54h x x x x x x x x
C1_0,C1_1 : Select source INT 1
C2_0,C2_1 : Select source INT 2
INT1 C1_1 C1_0 IRQ Sources IRQ Trigger Condition
Mode 1 0 0 COS P1&P2 (48bits) Change of State for PCI-
7396 P1 & P2
Mode 2 0 1 P1C0 OR ~P1C3 (see Table 4.2)
Mode 3 1 0 ~P1C0 falling edge of P1C0
Mode 4 1 1 Event Counter Counter count down to 0
INT2 C2_1 C2_0 IRQ Sources IRQ Trigger Condition
Mode 1 0 0 COS P3&P4(48bits) Change of State for PCI-
7396 P3 & P4
Mode 2 0 1 P2C0 OR ~P2C3 (see Table 4.2)
Mode 3 1 0 ~P2C0 falling edge of P2C0
Mode 4 1 1 32-bit Timer Timer count down to 0