HMC1197LP7FE datasheet(38/57 Pages) AD

38 / 57 page

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Phone: 978-250-3343

Fax: 978-250-3373

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HMC1197LP7FE

v03.0314

Wideband direct Quadrature Modulator

w/ Fractional-n Pll & Vco, 100 - 4000 MHz

2.0

Pll register Map

2.1

reg 00h id register (read only) deFault c7701a h

Bit

Type

Name

Width

Default

Description

[23:0]

chip_ID

C7701A

Chip ID Number

2.2

reg 00h open Mode read address/rSt Strobe register (Write only)

Bit

Type

Name

Width

Default

Description

[4:0]

Read Address

(WRITE ONLY) Read Address for next cycle

[5]

Soft Reset

(WRITE ONLY) Soft Reset - (set to 0 during operation)

[23:6]

Not Defined

Not Defined (set to write 0h)

2.3

reg 01h chip enable register deFault 3h

Bit

Type

Name

Width

Default

Description

[0]

R/W

Chip Enable Pin Select

1 = Chip enable via CHIP_EN pin, Reg 01h[0]=1 and

CHIP_EN pin low places the HMC1197LP7FE in Power

Down Mode

0 = Chip enable via SPI - Reg 01h[0] = 0, CHIP_EN pin

ignored (see Power Down Mode description for more

details)

[1]

R/W

SPI Chip Enable

Controls Chip Enable (Power Down) if Reg 01h[0] =0

Reg 01h[0]=0 and Reg 01h[1]=1 - chip is enabled, CHIP_

EN pin don’t care

Reg 01h[0]=0 and Reg 01h[1]=0 - chip disabled, CHIP_EN

pin don’t care

(see Power Down Mode description for more information)

[2]

R/W

Keep Bias On

keeps internal bias generators on, ignores Chip enable

control

[3]

R/W

Keep PFD Pn

keeps PFD circuit on, ignores Chip enable control

[4]

R/W

Keep CP On

keeps Charge Pump on, ignores Chip enable control

[5]

R/W

Keep Reference Buffer ON

keeps Reference buffer block on, ignores Chip enable

control

[6]

R/W

Keep VCO on

keeps VCO divider buffer on, ignores Chip enable control

[7]

R/W

Keep GPO Driver ON

keeps GPO output Driver ON, ignores Chip enable control

[9:8]

R/W

Reserved

reserved

2.4

reg 02h reFdiV register deFault 1h

Bit

Type

Name

Width

Default

Description

[13:0]

R/W

rdiv

Reference Divider ’R’ Value (EQ 8)

min 1

max max 214-1 = 3FFFh = 16383d

2.5

reg 03h Frequency register - integer Part deFault 19h

Bit

Type

Name

Width

Default

Description

[18:0]

R/W

Integer Setting

25d

19h

Divider Integer part, used in all modes, see (EQ 10)

Fractional Mode

min 20d

max 219 - 4 = 7FFFCh = 524,284d

Integer Mode

min 16d

max 219-1 = 7FFFFh = 524,287d

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