CC2420Z-RTR1 datasheet(80/92 Pages) TI

80 / 92 page

CC2420

SWRS041B

Page 80 of 89

TOPTST (0x2F) - Top Level Test Register

Bit

Field Name

Reset

R/W

Description

15:8

Reserved, write as 0.

RAM_BIST_RUN

R/W

Enable BIST of the RAM

0 : RAM BIST disabled, normal operation

1 : RAM BIST Enabled. Result output to pin, as set in IOCFG1.

TEST_BATTMON_EN

R/W

Enable test output of the battery monitor.

VC_IN_TEST_EN

R/W

When ATESTMOD_MODE=7 this controls whether the ATEST2

in is used to output the VC node voltage (0) or to control the VC

node voltage (1).

ATESTMOD_PD

R/W

Powerdown of analog test module.

0 : Power up

1 : Power down

3:0

ATESTMOD_MODE[3:0]

When ATESTMOD_PD=0, the function of the analog test module

is as follows:

0: Outputs “I” (ATEST1) and “Q” (ATEST2) from RxMIX.

1: Inputs “I” (ATEST2) and “Q” (ATEST1) to BPF.

2: Outputs “I” (ATEST1) and “Q” (ATEST2) from VGA.

3: Inputs “I” (ATEST2) and “Q” (ATEST1) to ADC.

4: Outputs “I” (ATEST1) and “Q” (ATEST2) from LPF.

5: Inputs “I” (ATEST2) and “Q” (ATEST1) to TxMIX.

6: Outputs “P” (ATEST1) and “N” (ATEST2) from Prescaler. Must

be terminated externally.

7: Connects TX IF to RX IF and simultaneously the ATEST1 pin

to the internal VC node (see VC_IN_TEST_EN).

8. Connect ATEST1 (input) to ATEST2 (output) through

single2diff and diff2single buffers, used for measurements on the

test-interface

RESERVED (0x30) - Reserved register containing spare control and status bits

Bit

Field Name

Reset

R/W

Description

15:0

RES[15:0]

R/W

Reserved for future use

TXFIFO (0x3E) – Transmit FIFO Byte register

Bit

Field Name

Reset

R/W

Description

7:0

TXFIFO[7:0]

Transmit FIFO byte register, write only. Reading the TXFIFO is

only possible using RAM read. Note that the crystal oscillator

must be running for writing to the TXFIFO.

RXFIFO (0x3F) – Receive FIFO Byte register

Bit

Field Name

Reset

R/W

Description

7:0

RXFIFO[7:0]

R/W

Receive FIFO byte register, read / write. Note that the crystal

oscillator must be running for accessing the RXFIFO.

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