AD9548 datasheet(72/111 Pages) AD

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AD9548

Data Sheet

Table 46. Nominal System Clock (SYSCLK) Period1

Address

Bits

Bit Name

Description

0x0103

[7:0]

System clock period (expressed in femtoseconds)

System clock period, Bits[7:0]

0x0104

[7:0]

System clock period, Bits[15:8]

0x0105

[7:5]

Unused

[4:0]

System clock period

System clock period, Bits[20:16]

Units are femtoseconds. The default value is 0x0F424 = 1,000,000 (1 ns) and implies a system clock frequency of 1 GHz.

Table 47. System Clock Stability Period1

Address

Bits

Bit Name

Description

0x0106

[7:0]

System clock stability period

System clock stability period, Bits[7:0] (default = 0x01)

0x0107

[7:0]

System clock stability period, Bits[15:8] (default = 0x00)

0x0108

[7:4]

Unused

[3:0]

System clock stability period

System clock stability period, Bits[19:16] (default = 0x0)

(default period = 0x00001, or 1 ms)

Units are milliseconds. The default value is 0x000001 = 1 (1 ms).

GENERAL CONFIGURATION (REGISTER 0x0200 TO REGISTER 0x0214)

Table 48. Multifunction Pin (M0 to M7) Control1

Address

Bits

Bit Name

Description

0x0200

[7]

M0 in/out

In/out control for the M0 pin

0 (default) = input (control pin)

1 = output (status pin)

[6:0]

M0 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0201

[7]

M1 in/out

In/out control for the M1 pin (same as M0)

[6:0]

M1 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0202

[7]

M2 in/out

In/out control for the M2 pin (same as M0)

[6:0]

M2 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0203

[7]

M3 in/out

In/out control for the M3 pin (same as M0)

[6:0]

M3 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0204

[7]

M4 in/out

In/out control for the M4 pin (same as M0)

[6:0]

M4 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0205

[7]

M5 in/out

In/out control for the M5 pin (same as M0)

[6:0]

M5 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0206

[7]

M6 in/out

In/out control for the M6 pin (same as M0)

[6:0]

M6 function

See Table 25 and Table 26 (default = 0xb0000000)

0x0207

[7]

M7 in/out

In/out control for the M7 pin (same as M0)

[6:0]

M7 function

See Table 25 and Table 26 (default = 0xb0000000)

The default setting for all the multifunction pins is as an unused control input pin.

Table 49. IRQ Pin Output Mode

Address

Bits

Bit Name

Description

0x0208

[7:2]

Unused

[1:0]

IRQ pin output mode

Select the output mode of the IRQ pin

00 (default) = NMOS, open drain (requires an external pull-up resistor)

01 = PMOS, open drain (requires an external pull-down resistor)

10 = CMOS, active high

11 = CMOS, active low

Rev. G | Page 72 of 111

AD9548 Datasheet(PDF) 72 Page - Analog Devices

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