MICRF507 Micrel Semiconductor, MICRF507 Datasheet - Page 12
MICRF507
Manufacturer Part Number
MICRF507
Description
470MHz to 510MHz Low-Power FSK Transceiver
Manufacturer
Micrel Semiconductor
Datasheet
1.MICRF507.pdf
(46 pages)
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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:
March 2010
Micrel, Inc.
•
•
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
register if more than one, to be written. The eighth
bit is the R/W bit, which is 0 as this is a write
operation.
Figure 2. Writing Bytes into n+1 Registers at Consecutive Addresses Starting with Address i
Figure 1. Writing a Byte into a Register
12
Bits passing through IO are clocked serially into pre-
buffers, then transferred in parallel to the actual registers
upon de-assertion of CS.
•
•
Clock in one or more bytes, MSB of each byte
first.
Bring CS low to end the transaction.
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M9999-032210-B
MICRF507
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