MICRF507 datasheet(12/46 Pages) MICREL

Part #	MICRF507

Description	470MHz to 510MHz Low-Power FSK Transceiver with 10dBm Power Amplifier

PDF	46 Pages

Scroll/Zoom	100%

Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

Logo

12 / 46 page

Micrel, Inc.

MICRF507

March 2010

M9999-032210-B

Writing

This method is used to write either to one register (see

Figure 1), or any number of registers with consecutive

addresses up to all 22 writeable registers (see Figure 2) in

a single transaction.

Procedure:

•

Bring CS active (high). IO is initially an input (and

remains so for the duration of the transaction).

•

Clock in a byte consisting of the address bits and

the R/W bit. The first seven bits are the address

(starting with MSB) of the register, or the first

bit is the R/W bit, which is 0 as this is a write

operation.

•

Clock in one or more bytes, MSB of each byte

first.

•

Bring CS low to end the transaction.

Bits passing through IO are clocked serially into pre-

buffers, then transferred in parallel to the actual registers

upon de-assertion of CS.

Figure 1. Writing a Byte into a Register

Figure 2. Writing Bytes into n+1 Registers at Consecutive Addresses Starting with Address i

MICRF507 Datasheet(PDF) 12 Page - Micrel Semiconductor