CC2520 DATASHEET
2.4 GHZ IEEE 802.15.4/ZIGBEE® RF TRANSCEIVER
SWRS068 – DECEMBER 2007
SRCMATCH, A 0x002, R 0x07, Source address matching and pending bits
Bit no. Bit mnemonic
Reset
value
Mode
Description
7:3
2
0x00
1
R/W
R/W
Reserved. Always write ‘0’
RESERVED[4:0]
When this bit is set, the AUTOPEND function also
requires that the received frame is a "DATA REQUEST"
MAC command frame.
PEND_DATAREQ_ONLY
1
1
R/W
Automatic acknowledgment pending flag enable.
AUTOPEND
Upon reception of a frame, the pending bit in the
(possibly) returned acknowledgment will be set
automatically, given that:
- FRMFILT0.FRAME_FILTER_EN is set.
- SRCMATCH.SRC_MATCH_EN is set.
- SRCMATCH.AUTOPEND is set.
- The received frame matches the current
SRCMATCH.PEND_DATAREQ_ONLY setting.
- The received source address matches at least one
source match table entry, which is enabled in both
SHORT_ADDR_EN and SHORT_PEND_EN or
EXT_ADDR_EN and EXT_PEND_EN.
Note: Details for SHORT_PEND_EN and
EXT_PEND_EN is found in memory map description.
0
1
R/W
Source address matching enable (This bit is “don’t care” if
FRMFILT0.FRAME_FILTER_EN = 0)
SRC_MATCH_EN
SRCSHORTEN0, A 0x004, R 0x00, Short address matching
Bit no. Bit mnemonic
Reset
value
Mode
Description
7:0
0x00
R/W
The 7:0 part of the 24-bit word SHORT_ADDR_EN that
enables / disables source address matching for each of
the 24 short address table entries.
SHORT_ADDR_EN[7:0]
Optional safety feature: To ensure that an entry in the
source matching table is not used while it is being
updated, set the corresponding SHORT_ADDR_EN bit to
0 while updating.
SRCSHORTEN1, A 0x005, R 0x00, Short address matching
Bit no. Bit mnemonic
Reset
value
Mode
Description
7:0
0x00
R/W
The 15:8 part of the 24-bit word SHORT_ADDR_EN
See description of SRCSHORTEN0.
SHORT_ADDR_EN[15:8]
SRCSHORTEN2, A 0x006, R 0x00, Short address matching
Bit no. Bit mnemonic
Reset
value
Mode
Description
7:0
0x00
R/W
The 23:16 part of the 24-bit word SHORT_ADDR_EN
See description of SRCSHORTEN0.
SHORT_ADDR_EN[23:16]
107
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