micrf506 Micrel Semiconductor, micrf506 Datasheet - Page 12

• Manufacturer Part Number: micrf506
• Description: 410mhz And 450mhz Ism Band Transceiver
• Manufacturer: Micrel Semiconductor

Micrel
Symbol
Tper
Thigh
Tlow
tfall
trise
Tcsr
Tcsf
Twrite
Tread
September 2004
Table 6. Timing Specification for the 3-wire
Parameter
Min. period of
SCLK
Min. high time of
SCLK
Min. low time of
SCLK
Max. time of
falling edge of
SCLK
Max. time of rising
edge of SCLK
Max. time of rising
edge of CS to
falling edge of
SCLK
Min. delay from
rising edge of CS
to rising edge of
SCLK
Min. delay from
valid IO to falling
edge of SCLK
during a write
operation
Min. delay from
rising edge of
SCLK to valid IO
during a read
operation
(assuming load
capacitance of IO
is 25pF)
Programming Interface
Min.
50
20
20
75
0
5
0
Values
Typ.
Max.
1
1
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
12
Programming summary
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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
register(s), bring CS low and set IO an
output.
[phone]
M9999-092904
MICRF506