CC1110-RTR1 datasheet(155/203 Pages) TI

155 / 203 page

CC1110

CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A

Page 155 of 202

mode, enable transmit mode and other

functions.

The command strobes are issued by

writing to the RFST SFR register. The list

of all strobe commands which are defined

is given in Table 42.

Figure 33 shows a simplified state diagram

that explains the main states, together with

typical usage and current consumption in

the radio part. The diagram shows the

state transitions that are controlled by the

command strobes. For detailed information

on controlling the radio state machine, and

a complete state diagram, see section

15.12 on page 167.

Transmit mode

Receive mode

Idle

Manual freq.

synth. calibration

Frequency

synthesizer on

SFSTXON

SRX

STX

STX or RXOFF_MODE=10

RXOFF_MODE=00

SRX or TXOFF_MODE=11

SIDLE

SCAL

TXOFF_MODE=00

SFSTXON or RXOFF_MODE=01

SRX or STX or SFSTXON

TXOFF_MODE=01

Frequency

synthesizer startup,

optional calibration,

settling

Optional freq.

synth. calibration

Default state when the radio is not

receiving or transmitting. Typ.

current consumption in radio:

1.8mA.

Used for calibrating frequency

synthesizer upfront (entering

receive or transmit mode can

then be done quicker).

Transitional state. Typ. current

consumption in radio: 7.6mA.

Frequency synthesizer is turned on, can optionally be

calibrated, and then settles to the correct frequency.

Transitional state. Typ. current consumption in radio:

7.6mA.

Frequency synthesizer is on,

ready to start transmitting.

Transmission starts very

quickly after receiving the

STX command strobe.Typ.

current consumption in radio:

7.6mA.

Typ. current consumption in

radio:

11.5mA at -12dBm output,

15.4mA at -6dBm output,

21.6mA at 0dBm output.

Typ. current consumption:

from 13.3mA (strong

input signal) to 15.6mA

(weak input signal).

Optional transitional state. Typ.

current consumption: 7.6mA.

Idle

Figure 33: Simplified state diagram, with typical usage and current consumption in radio

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