CC115LRGPR.B datasheet(53/74 Pages) TI2

53 / 74 page

CC115L

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SWRS105B – MAY 2011 – REVISED JUNE 2014

Table 5-37. 0x18: MCSM0 - Main Radio Control State Machine Configuration

Bit

Field Name

Reset

R/W

Description

7:6

Not used

Automatically calibrate when going to or from TX mode

Setting

When to perform automatic calibration

0 (00)

Never (manually calibrate using SCAL strobe)

1 (01)

When going from IDLE to TX (or FSTXON)

5:4

FS_AUTOCAL[1:0]

0 (00)

R/W

When going from TX back to IDLE

2 (10)

automatically

Every 4th time when going from TX to IDLE

3 (11)

automatically

Programs the number of times the six-bit ripple counter must

expire after the XOSC has settled before CHP_RDYn goes

low.(1)

If XOSC is on (stable) during power-down, PO_TIMEOUT

shall be set so that the regulated digital supply voltage has

time to stabilize before CHP_RDYn goes low

(PO_TIMEOUT=2 recommended). Typical start-up time for the

voltage regulator is 50

μs.

For robust operation it is recommended to use PO_TIMEOUT

= 2 or 3 when XOSC is off during power-down.

Timeout after

Setting

Expire count

3:2

PO_TIMEOUT

1 (01)

R/W

XOSC start

Approximately 2.3

0 (00)

- 2.4

μs

Approximately 37 -

1 (01)

μs

Approximately 149

2 (10)

- 155

μs

Approximately 597

3 (11)

256

- 620

μs

Exact timeout depends on crystal frequency.

R/W

Use setting from SmartRF Studio SWRC176

XOSC_FORCE_ON

R/W

Force the XOSC to stay on in the SLEEP state.

(1)

Note that the XOSC_STABLE signal will be asserted at the same time as the CHIP_RDYn signal; that is, the PO_TIMEOUT delays both

signals and does not insert a delay between the signals.

Table 5-38. 0x20: RESERVED

Bit

Field Name

Reset

R/W

Description

7:3

31 (11111)

R/W

Use setting from SmartRF Studio SWRC176

Not used

1:0

0 (00)

R/W

Use setting from SmartRF Studio SWRC176

Table 5-39. 0x22: FREND0 - Front End TX Configuration

Bit

Field Name

Reset

R/W

Description

7:6

Not used

LODIV_BUF_CURRENT_

Adjusts current TX LO buffer (input to PA). The value to use in

5:4

1 (01)

R/W

TX[1:0]

this field is given by the SmartRF Studio software SWRC176.

Not used

Selects PA power setting. This value is an index to the

PATABLE, which can be programmed with up to 2 different PA

2:0

PA_POWER[2:0]

0 (000)

R/W

settings. When using OOK, PA_POWER should be 001, and for

all other modulation formats it should be 000, see Section 5.5.6.

Detailed Description

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