CC2400-RTR1 datasheet(71/84 Pages) TI

71 / 84 page

CC2400

SWRS042A

Page 71 of 83

FSTST2 (0x1C) - Frequency Synthesiser Test Register 2

Bit

Field Name

Reset

R/W

Description

Reserved, write as 0.

14:13

VCO_CURCAL_SPEED[1:0]

R/W

VCO current calibration speed:

0: Normal

1: Undefined

2: Half speed

3: Undefined.

VCO_CURRENT_OE

R/W

VCO current manual override enable.

11:6

VCO_CURRENT_O[5:0]

R/W

VCO current override value (current A).

5:0

VCO_CURRENT_RES[5:0]

The resulting VCO current setting from last calibration.

FSTST3 (0x1D) - Frequency Synthesiser Test Register 3

Bit

Field Name

Reset

R/W

Description

15:14

Reserved, write as 0.

CHP_TEST_UP

R/W

When CHP_DISABLE

=1 forces the CHP to output "up" current.

CHP_TEST_DN

R/W

When CHP_DISABLE

=1 forces the CHP to output "down"

current.

CHP_DISABLE

R/W

Set to disable charge pump during VCO calibration.

PD_DELAY

R/W

Selects short or long reset delay in phase detector:

0: Short reset delay

1: Long reset delay

9:8

CHP_STEP_PERIOD[1:0]

R/W

The charge pump current value step period:

0: 0.25 us

1: 0.5 us

2: 1 us

3: 4 us

7:4

STOP_CHP_CURRENT[3:0]

R/W

The charge pump current to stop at after the current is stepped

down from START_CHP_CURRENT after VCO calibration is

complete. The current is stepped down periodically with intervals

as defined in CHP_STEP_PERIOD.

3:0

START_CHP_CURRENT

[3:0]

R/W

The charge pump current to start with after VCO calibration is

complete. The current is then stepped down periodically to the

value STOP_CHP_CURRENT with intervals as defined in

CHP_STEP_PERIOD

CC2400-RTR1 数据表(PDF) 71 Page - Texas Instruments

CC2400-RTR1 数据表(HTML) 71 Page - Texas Instruments

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