CC2420 Datasheet, PDF (79/87 Pages) List of Unclassifed Manufacturers – 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver

SmartRF ^® CC2420
TOPTST (0x2F) - Top Level Test Register
Bit
15:8
7
Field Name
-
RAM_BIST_RUN
Reset R/W
0
W0
0
R/W
6
TEST_BATTMON_EN
5
VC_IN_TEST_EN
4
ATESTMOD_PD
0
R/W
0
R/W
1
R/W
3:0
ATESTMOD_MODE[3:0]
Description
Reserved, write as 0.
Enable BIST of the RAM
0 : RAM BIST disabled, normal operation
1 : RAM BIST Enabled. Result output to pin, as set in IOCFG1.
Enable test output of the battery monitor.
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).
Powerdown of analog test module.
0 : Power up
1 : Power down
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
15:0
Field Name
RES[15:0]
Reset
0
R/W
R/W
Description
Reserved for future use
TXFIFO (0x3E) – Transmit FIFO Byte register
Bit
7:0
Field Name
TXFIFO[7:0]
Reset
R/W
-
W
Description
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
7:0
Field Name
RXFIFO[7:0]
Reset
R/W
-
R/W
Description
Receive FIFO byte register, read / write. Note that the crystal
oscillator must be running for accessing the RXFIFO.
Chipcon AS SmartRF^® CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 79 of 87