AD1816AJS datasheet(44/52 Pages) AD

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AD1816A

–44–

REV. A

Byte 2

76543210

IRQSEL4—9—11

IRQSEL9—14

IRQSEL11—15

IRQSEL4—10

XTRASZ0[3:0]

Sets the XTRA device I/O range 0 length. The XTRASZ0 bits set the length of the first XTRA

device I/O range as follows:

XTRASZ0

I/O Range Length

0000

1000

1100

1110

1111

All other combinations should be avoided.

IRQSEL4_10

Program to one to enable IRQ 10. (*, if MODEM_EN is zero)

Program to zero to enable IRQ 4. (*, if MODEM_EN is one)

IRQSEL11_15

Program to one to enable IRQ 15. (*)

Program to zero to enable IRQ 11.

IRQSEL9_14

Program to one to enable IRQ 14.

Program to zero to enable IRQ 9. (*)

IRQSEL4_9_11

Program to one to enable IRQ 11. (*)

Program to zero to enable IRQ 4 (if MODEM_EN is one) or IRQ 9 (if MODEM_EN is zero).

Byte 3

76543210

XTRASZ1[3:0]

XTRA—CS

IRQ—EN

MIRQINV

XIRQINV

Program to one to make LD_IRQ active-low.

Program to zero to make LD_IRQ active-high. (*)

MIRQINV

Program to one to make MDM_IRQ active-low.

Program to zero to make MDM_IRQ active-high. (*)

IRQ_EN

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

2S port 1 (SUPER_EN and

MODEM_EN must also be zero). (*)

XTRA_CS

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.

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

range as follows:

XTRASZ1

I/O Range Length

0000

1000

1100

1110

1111

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

2S0_HV = EE_DATA pin

AD1816AJS 数据表(PDF) 44 Page - Analog Devices

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