ad1816a Analog Devices, Inc., ad1816a Datasheet - Page 44

• Manufacturer Part Number: ad1816a
• Description: Soundport Controller
• Manufacturer: Analog Devices, Inc.

AD1816A
Byte 2
XTRASZ0[3:0] Sets the XTRA device I/O range 0 length. The XTRASZ0 bits set the length of the first XTRA
All other combinations should be avoided.
IRQSEL4_10
IRQSEL11_15
IRQSEL9_14
IRQSEL4_9_11 Program to one to enable IRQ 11. (*)
Byte 3
XIRQINV
MIRQINV
IRQ_EN
XTRA_CS
XTRASZ1[3:0] Sets the XTRA device I/O range one length. The XTRASZ1 bits set the length of the second XTRA device I/O
All other combinations should be avoided.
USING THE AD1816A WITHOUT AN EEPROM
If the EEPROM is absent (EE_CLK pin = GND), then the flags are set as shown below:
MODEM_EN = XTRA_EN = SUPER_EN = XTRA_HV = RSTB_EN = IRQ_EN = 0
IRQSEL9_14 = MIRQINV = XIRQINV = 0
IRQSEL4_10 = IRQSEL11_15 = IRQSEL4_9_11 = 1
I
2
S0_HV = EE_DATA pin
IRQSEL4
7
7
—
9
—
11
Program to one to enable IRQ 10. (*, if MODEM_EN is zero)
Program to zero to enable IRQ 4. (*, if MODEM_EN is one)
Program to one to enable IRQ 15. (*)
Program to zero to enable IRQ 11.
Program to one to enable IRQ 14.
Program to zero to enable IRQ 9. (*)
Program to zero to enable IRQ 4 (if MODEM_EN is one) or IRQ 9 (if MODEM_EN is zero).
Program to one to make LD_IRQ active-low.
Program to zero to make LD_IRQ active-high. (*)
Program to one to make MDM_IRQ active-low.
Program to zero to make MDM_IRQ active-high. (*)
Program to one to enable additional IRQ options on the ISA bus. If MODEM_EN is zero, then two IRQs are
added; if MODEM_EN is one, this bit is ignored. Program to zero to enable I
MODEM_EN must also be zero). (*)
Program to one to enable a second I/O range for the XTRA or SUPER logical devices. It is identical to
the first I/O range, except its size is controlled by XTRASZ1[3:0]. Program to zero to enable the XCTR1/
RING_IN pin. (*) Always considered to be zero if XTRA_EN is zero.
range as follows:
device I/O range as follows:
IRQSEL9
6
6
XTRASZ1[3:0]
XTRASZ0
0000
1000
1100
1110
1111
—
XTRASZ1
0000
1000
1100
1110
1111
14
IRQSEL11
5
5
—
15
I/O Range Length
16
8
4
2
1
I/O Range Length
16
8
4
2
1
IRQSEL4
4
4
—
10
–44–
XTRA
3
3
—
CS
IRQ
2
2
—
EN
XTRASZ0[3:0]
2
S port 1 (SUPER_EN and
MIRQINV
1
1
XIRQINV
0
0
REV. A