MICRF506BML datasheet(14/42 Pages) MICREL

14 / 42 page

Micrel

MICRF506BML/YML

July 2006

M9999-092904

+1 408-944-0800

Programming summary

•

Use CS, SCLK, and IO to get access to the

control registers in MICRF506.

•

SCLK is user-controlled.

•

Write to the MICRF506 at positive edges

(MICRF506 reads at negative edges).

•

Read from the MICRF506 at negative edges

(MICRF506 writes at positive edges)

•

After power-on: Write to the complete set of

control registers.

•

Address field is 7 bits long. Enter msb first.

•

R/W bit is 1 bit long (“1” for read, “0” for

write)

•

Address and R/W bit together make 1 octet

•

All control registers are 8 bits long.

Enter/read msb in every octet first.

•

Always write 8 bits to/read 8 bits from a

control register. This is the case for registers

with less than 8 used programming bits as

well.

•

Writing: Bring CS high, write address and

R/W bit followed by the new values to fill into

the addressed control register(s) and bring

CS low for loading, i.e. activation of the new

control register values (“load_en” = 1).

•

Reading: Bring CS high, write address and

R/W bit, set IO as an input, read present

contents of the addressed control

output.

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