FEDL7066-01

ML7066

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Notes on Operation

This section describes the notes on using the ML7066.

1) Initial settings

Initial settings are required for optimization of the RF characteristics. Perform the following ML7066 initial settings after reset.

ML7066 Initial Settings

No.

Direction

Type

Command

Data

SCI format

1

ML7066

→ MCU

Confirm

0x15

0x07

SDO: 0C 02 15 07

2

MCU

→ ML7066

Request

0x5F

0x8888

SDI: 08 03 5F 88 88

3

MCU

→ ML7066

Request

0x42

0x2111

SDI: 08 03 42 11 21

4

MCU

→ ML7066

Request

0x40

0xB587

SDI: 08 03 40 87 B5

5

MCU

→ ML7066

Request

0x41

0x82E9

SDI: 08 03 41 E9 82

6

MCU

→ ML7066

Request

0x47

0x0883

SDI: 08 03 47 83 08

7

MCU

→ ML7066

Request

0x43

0xFE01

SDI: 08 03 43 01 FE

8

MCU

→ ML7066

Request

0x45

0x0020

SDI: 08 03 45 20 00

9

MCU

→ ML7066

Request

0x02

0x09

SDI: 08 02 02 09

10

ML7066

→ MCU

Confirm

0x03

0x07

SDO: 0C 02 03 07

11

MCU

→ ML7066

Request

0x4D

0x0040

SDI: 08 03 4D 40 00

12

Set 2msec WAIT for MCU.

13

MCU

→ ML7066

Request

0x02

0x08

SDI: 08 02 02 08

14

ML7066

→ MCU

Confirm

0x03

0x07

SDO: 0C 02 03 07

15

MCU

→ ML7066

Request

0x45

0x0000

SDI: 08 03 45 00 00

16

MCU

→ ML7066

Request

0x42

0x2110

SDI: 08 03 42 10 21

17

MCU

→ ML7066

Request

0x5F

0x0000

SDI: 08 03 5F 00 00

2) Notification from ML7066

If ML7066 state settings cause a mismatch between an instruction and an internal status, a confirmation that is not listed in the

data sheet may be notified fairly infrequently. If you receive such a confirmation, simply discard it.

Example)

04_00 (Confirmation with Length=0)

04_02_02_02 (SET_TRX_STATE.request never has the data 02)

04_05_05_05_05_05_05 (SET_RSSI.indication never has Length=5)

3) Seal

The first and second generations are distinguished by the seal.

The seal of the second generation is ML7066B.

Note that the first generation includes the following restriction.

Restrictions: The timer value set in the SET_TIMER.request command should be 15 seconds or shorter.

4) Regulator

The regulator in ML7066 has a built-in overcurrent protection circuit. The current control is switched between the following

two levels, based on the supplied voltage. We have verified that the overcurrent protection circuit can prevent an occurred

inrush current from affecting the function and lifetime of ML7066. However, it cannot prevent an inrush current of the charge

in bypass capacitors or other parts at power-on alone. You should verify the protection on your implementation.

For a low VREG_OUT output voltage (VREG_IN*0.45V or lower): clamped at about 100mA.

For a high VREG_OUT output voltage (VREG_IN*0.45V or higher): clamped at about 500mA.