CC1150-RTY1 datasheet(47/67 Pages) TI1

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CC1150

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SWRS037B – JANUARY 2006 – REVISED MARCH 2015

Table 5-33. 0x18: MCSM0 – Main Radio Control State Machine Configuration

BIT

FIELD

TYPE

RESET

DESCRIPTION

7:6

Not Used.

5:4

FS_AUTOCAL[1:0]

R/W

0x0

Automatically calibrate when going to TX, or back to

IDLE:

The binary number is the setting and the result is when

to perform automatic calibration.

00 = Never (manually calibrate using SCAL strobe)

01 = When going from IDLE to TX (or FSTXON)

10 = When going from TX back to IDLE

11 = Every 4th time when going from TX to IDLE

3:2

PO_TIMEOUT

R/W

0x1

Programs the number of times the six-bit ripple counter

must expire after XOSC has stabilized before

CHP_RDY_N goes low.

The XOSC is off during power-down and if the regulated

digital supply voltage has sufficient time to stabilize while

waiting for the crystal to be stable, PO_TIMEOUT can be

set to 0. For robust operation it is recommended to use

PO_TIMEOUT=2.

The binary number is the setting, the result is the expire

count, and the definition is the timeout after XOSC start.

00 = 1 : Approx. 2.3

μs – 2.7 μs

01 = 16 : Approx. 37

μs – 43 μs

10 = 64 : Approx. 146

μs – 171 μs

11 = 256 : Approx. 585

μs – 683 μs

Exact timeout depends on crystal frequency.

In order to reduce start up time from the SLEEP state,

this field is preserved in powerdown (SLEEP state).

1:0

Reserved

Defined on the transceiver version (CC1101)

Table 5-34. 0x22: FREND0 – Front End TX Configuration

BIT

FIELD

TYPE

RESET

DESCRIPTION

7:6

Not Used.

5:4

LODIV_BUF_

R/W

0x1

Adjusts current TX LO buffer (input to PA).

CURRENT_TX[1:0]

The value to use in register field is given by

the SmartRF Studio [11] software.

Not Used.

2:0

PA_POWER[2:0]

R/W

0x0

Selects PA power setting. This value is an

index to the PATABLE, which can be

programmed with up to 8 different PA

settings. In ASK mode, this selects the

PATABLE index to use when transmitting a

‘1’. PATABLE index zero is used in ASK when

transmitting a ‘0’. The PATABLE settings from

index ‘0’ to the PA_POWER value are used

for ASK TX shaping, and for power ramp-

up/ramp-down at the start/end of transmission

in all TX modulation formats.

Detailed Description

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