MICRF505YML Micrel Inc, MICRF505YML Datasheet - Page 12

• Manufacturer Part Number: MICRF505YML
• Description: 433/915MHZ ITRANSCEIVER, SMD, MLF32
• Manufacturer: Micrel Inc

Specifications of MICRF505YML

• Transmitting Current: 28mA
• Data Rate: 200Kbps
• Frequency Range: 850MHz To 950MHz
• Modulation Type: FSK
• Sensitivity Dbm: -111dBm
• Rf Ic Case Style: MLF
• No. Of Pins: 32
• Supply Voltage Range: 2V To 2.5V
• Output Power: 10dBm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MICRF505
Programming interface timing
Figure 4 and Table 6 shows the timing specification for the 3-wire serial programming interface.
M9999-051304
Programming summary
Symbol
Tper
Thigh
Tlow
tfall
trise
Tcsr
Tcsf
Twrite
Tread
• Use CS, SCLK, and IO to get access to the control
• SCLK is user-controlled.
• Write to the MICRF505 at positive edges (MICRF
• Read from the MICRF505 at negative edges
• After power-on: Write to the complete set of control
• Address field is 7 bits long. Enter msb first
• R/W bit is 1 bit long (“1” for read, “0” for write)
registers in MICRF505.
505 reads at negative edges).
(MICRF505 writes at positive edges).
registers
Parameter
Min. period of SCLK
Min. high time of SCLK
Min. low time of SLCK
Max. time of falling edge of SLCK
Max. time of rising edge of SLCK
Min. delay from rising edge of CS to falling edge of SCLK
Min. delay from falling 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 25 pF)
Table 6. Timing Specification for the 3-Wire Programming Interface
CS
SCLK
IO
Tcsr
A6 A5
Address Register
trise
tfall
Figure 4.
A0
Tper
12
RW D7
Tlow
ThighTread
• Address and R/W bit together make 1 octet
• All control registers are 8 bits long. Enter/read msb
• Always write 8 bits to/read 8 bits from a control
• Writing: Bring CS high, write address and R/W bit
• Reading: Bring CS high, write address and R/W
in every octet first
register. This is the case for registers with less than
8 used programming bits as well.
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).
bit, set IO as an input, read present contents of the
addressed control register(s), bring CS low and set
IO as an output.
D6
Data Register
Twrite
D2
D1
Min.
50
20
20
75
0
5
0
D0
LOAD
Tcsl
Values
Typ.
Max.
May 13, 2004
1
1
Units
Micrel
ns
ns
ns
ms
ms
ns
ns
ns
ns