MICRF505

Micrel

M9999-051304

8

May 13, 2004

Adr

Data

A6..A0

D7

D6

D5

D4

D3

D2

D1

D0

0000000

LNA_by

PA2

PA1

PA0

Sync_en

Mode1

Mode0

Load_en

0000001

Modulation1

Modulation0

‘0’

‘0’

RSSI_en

LD_en

PF_FC1

PF_FC0

0000010

CP_HI

‘0’

‘0’

‘0’

OUTS3

OUTS2

OUTS1

OUTS0

0000011

‘1’

‘1’

‘0’

VCO_IB2

VCO_IB1

VCO_IB0

VCO_freq1

VCO_freq0

0000100

Mod_F2

Mod_F1

Mod_F0

Mod_I4

Mod_I3

Mod_I2

Mod_I1

Mod_I0

0000101

-

-

‘0’

‘1’

Mod_A3

Mod_A2

Mod_A1

Mod_A0

0000110

-

Mod_clkS2

Mod_clkS1

Mod_clkS0 BitSync_clkS2 BitSync_clkS1 BitSync_clkS0 BitRate_clkS2

0000111

BitRate_clkS1 BitRate_clkS0

RefClk_K5

RefClk_K4

RefClk_K3

RefClk_K2

RefClk_K1

RefClk_K0

0001000

‘1’

ScClk_X2

ScClk5

ScClk4

ScClk3

ScClk2

ScClk1

ScClk0

0001001

‘0’

‘0’

‘1’

XCOtune4

XCOtune3

XCOtune2

XCOtune1

XCOtune0

0001010

-

-

A0_5

A0_4

A0_3

A0_2

A0_1

A0_0

0001011

----

N0_11

N0_10

N0_9

N0_8

0001100

N0_7

N0_6

N0_5

N0_4

N0_3

N0_2

N0_1

N0_0

0001101

----

M0_11

M0_10

M0_9

M0_8

0001110

M0_7

M0_6

M0_5

M0_4

M0_3

M0_2

M0_1

M0_0

0001111

-

-

A1_5

A1_4

A1_3

A1_2

A1_1

A1_0

0010000

----

N1_11

N1_10

N1_9

N1_8

0010001

N1_7

N1_6

N1_5

N1_4

N1_3

N1_2

N1_1

N1_0

0010010

----

M1_11

M1_10

M1_9

M1_8

0010011

M1_7

M1_6

M1_5

M1_4

M1_3

M1_2

M1_1

M1_0

0010100

‘1’

‘0’

‘1’

‘1’

‘0’

‘1’

‘0’

‘1’

0010101

----

FEEC_3

FEEC_2

FEEC_1

FEEC_0

0010110

FEE_7

FEE_6

FEE_5

FEE_4

FEE_3

FEE_2

FEE_1

FEE_0

Table 1. Control Registers in MICRF505

Names of programming bits, unused bits (“-”) and fixed bits (“1” or “0”) are shown. The control register with address 0 is referred to as

ControlRegister0 etc.

Writing to the control registers in

MICRF505

Writing: A number of octets are entered into MICRF505

followed by a load-signal to activate the new setting. Making

these events is referred to as a “write sequence.” It is possible

to update all, 1, or n control registers in a write sequence. The

address to write to (or the first address to write to) can be any

valid address (0-21). The IO line is always an input to the

MICRF505 (output from user) when writing.

What to write:

• The address of the control register to write to (or if

more than 1 control register should be written to,

the address of the 1st control register to write to)

• A bit to enable reading or writing of the control

registers. This bit is called the R/W bit.

• The values to write into the control register(s)

Field

Comments

Address:

A 7 bit field, ranging from 0 to 21. MSB is written first.

R/W bit:

A 1-bit field, = “0” for writing

Values:

A number of octetes (1-22 octetes). MSB in every octet is written first. The first octet is written to the control register

with the specified address (="Adress"). The next octet (if there is one) is writtento the control register with address=

"Adress + 1" and so on.

Table 2.