AD1816A

–45–

REV. A

MAPPING THE AD1816 EEPROM INTO THE AD1816A EEPROM

The equations below map AD1816 flags onto AD1816A flags:

MODEM_EN = MODEM_EN

XTRA_EN = XTRA_EN

SUPER_EN = 0

I

XTRA_HV = VOL_EN * VOL_SEL

IRQSEL12_13 = X (don’t care)

IRQSEL3_9 = 0

RSTB_EN = 0

XTRASZ0[3] =

XTRA_SIZE

XTRASZ0[2:0] = 000

IRQSEL4_10 =

MODEM_EN

IRQSEL11_15 = 1

IRQSEL9_14 = 0

IRQSEL4_9_11 = 1

XIRQINV = 0

MIRQINV = 0

IRQ_EN = 0

XTRA_CS = 0

XTRASZ1[3:0] = XXXX (don’t care)

PIN MUXING IN THE AD1816 AND AD1816A

Some AD1816 and AD1816A options are mutually exclusive because there are a limited number of pins on the device to support

them all. The tables below map functions to pin, and show how the flags must be set to assign functions to pins. For each pin, the

first function listed is the default; that function is used if the EEPROM is absent or invalid.

Table XIII. AD1816 Pin Muxing

PQFP

TQFP

Pin Function

I/O

Flags Required

199

I

I

VOL_EN + (XTRA_EN * VOL_SEL)

VOL_UP

I

VOL_EN * (XTRA_EN +

VOL_SEL)

2

100

I

I

VOL_EN + (XTRA_EN *VOL_SEL)

VOL_DN

I

VOL_EN * (XTRA_EN +

VOL_SEL)

31

I

I

VOL_EN + (XTRA_EN * VOL_SEL)

GND

I

VOL_EN * (XTRA_EN +

VOL_SEL)

77

75

IRQ(10)

O (1)

MODEM_EN

IRQ(4)

O (1)

MODEM_EN

81

79

I

I

MODEM_EN

IRQ(3)

O (1)

MODEM_EN

82

80

I

I

MODEM_EN

MDM_IRQ

I

MODEM_EN

83

81

I

I

MODEM_EN

MDM_SEL

O (2)

MODEM_EN

97

95

SPORT_SCLK

O

XTRA_EN * (VOL_EN * VOL_SEL)

LD_SEL

O

XTRA_EN

No Connect

O

XTRA_EN * VOL_EN * VOL_SEL

98

96

SPORT_SDFS

O (2)

XTRA_EN * (VOL_EN * VOL_SEL)

LD_DRQ

I

XTRA_EN

VOL_UP

I

XTRA_EN * (VOL_EN * VOL_SEL)

99

97

SPORT_SDO

O

XTRA_EN * (VOL_EN * VOL_SEL)

LD_DACK

O

XTRA_EN

No Connect

O

XTRA_EN * VOL_EN * VOL_SEL

100

98

SPORT_SDI

I

XTRA_EN * (VOL_EN * VOL_SEL)

LD_IRQ

I

XTRA_EN * XTRA_IRQ

VOL_DN

I

XTRA_EN * (VOL_EN * VOL_SEL)

GND

I

XTRA_EN *

XTRA_IRQ

(1) IRQ pins are three-stated if not assigned to a logical device.

(2) A pull-up or pull-down resistor may be required if EEPROM is used, because this pin is three-stated while EEPROM is read.