For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

13

HMC1035LP6GE

v02.0614

HigH Performance, +3.3 V clock generator

25 - 2500 mHz

1.1

Serial Port

1.1.1

Serial Port modes of operation

the HMC1035lP6Ge serial port interface can operate in two different modes of operation.

a. HMCsPI HMC Mode (HMC legacy Mode) - single slave per HMCsPI Bus

b. HMCsPI open Mode - Up to 8 slaves per HMCsPI Bus.

Both Modes support 5-bits of register address space. HMC Mode can support up to 6 bits of register

address.

register 0 has a dedicated function in each mode. open Mode allows wider compatibility with other

manufacturers sPI protocols.

register 0 comparison - Single vs multi-User modes

Single User

HMC Mode

Multi-User

Open Mode

reaD

Chip ID

24-bits

Chip ID 24-bits

WRITE

soft reset,

General strobes

read address [4:0]

soft reset [5]

General strobes [23:6]

1.1.2

HmcSPi Protocol Decision after Power-on reset

on power up both types of modes are active and listening.

a decision to select the desired sPI protocol is made on the irst occurrence of sen or sClk following a

hard reset, after which the protocol is ixed and only changeable by cycling the power oFF and on.

a. If a rising edge on sen is detected irst HMC Mode is selected.

b. If a rising edge on sClk is detected irst open mode is selected.

1.1.3

Serial Port Hmc mode - Single Pll

HMC Mode (legacy Mode) serial port operation can only address and talk to a single Pll, and is compatible

with most Hittite Plls and Plls with Integrated VCos.

protocol featuring

a. 1 read/Write bit

b. 6 address bits

c. 24 data bits

d. 3 wire for Write only, 4 wire for read/Write capability

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D