
DS3161/DS3162/DS3163/DS3164
Register Name:
FF.RLCR
Register Description:
FIFO Receive Level Control Register
Register Address:
(1,3,5,7)92h
Bit #
15
14
13
12
11
10
9
8
Name
--
RFAE5
RFAE4
RFAE3
RFAE2
RFAE1
RFAE0
Default
0
1
0
Bit #
7
6
5
4
3
2
1
0
Name
--
RFAF5
RFAF4
RFAF3
RFAF2
RFAF1
RFAF0
Default
0
1
0
Bits 13 to 8: Receive FIFO Almost Empty Level (RFAE[5:0]) – In POS-PHY packet processing mode, these six
bits indicate the maximum number of four byte groups that can be stored in the Receive FIFO for it to be
considered "almost empty". E.g., a value of 30 (1Eh) results in the FIFO being "almost empty" when it contains 120
(78h) bytes or less. In cell processing mode, RFAE[5:2] are ignored, and RFAE[1:0] indicate the maximum number
of cells that can be stored in the Receive FIFO for it to be considered "almost empty".
Bits 5 to 0: Receive FIFO Almost Full Level (RFAF[5:0]) – In POS-PHY packet processing mode, these six bits
indicate the maximum number of four byte groups that can be available in the Receive FIFO for it to be considered
"almost full". E.g., a value of 30 (1Eh) results in the FIFO being "almost full" when it has 120 (78h) bytes or less
available. In cell processing mode, these bits are ignored.
Register Name:
FF.RFPAC
Register Description:
FIFO Receive Port Address Control Register
Register Address:
(1,3,5,7)94h
Bit #
15
14
13
12
11
10
9
8
Name
--
Default
0
Bit #
7
6
5
4
3
2
1
0
Name
--
RPA4
RPA3
RPA2
RPA1
RPA0
Default
0
Bits 4 to 0: Receive FIFO System Port Address (RPA[4:0]) – These five bits set the Receive FIFO system
interface port address used to poll the Receive FIFO for fill status, and select it for data transfer. Each port in the
device must have a different port address. In Level 2 mode, if bits RPA[4:0] are set to a value of 1Fh, the port is
disabled.
Register Name:
FF.RSRL
Register Description:
FIFO Receive Status Register Latched
Register Address:
(1,3,5,7)98h
Bit #
15
14
13
12
11
10
9
8
Name
--
Bit #
7
6
5
4
3
2
1
0
Name
--
RFOL
Bit 0: Receive FIFO Overflow Latched (RFOL) – This bit is cleared when a logic one is written to this bit, and set
when a Receive FIFO overflow condition occurs. An overflow condition results in a loss of data.