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参数资料
型号： DS3131
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： Telecom IC:Other
英文描述： SPECIALTY TELECOM CIRCUIT, PBGA256
封装： 27 X 27 MM, PLASTIC, BGA-256
文件页数： 135/174页
文件大小： 1261K
代理商： DS3131
DS3131
63 of 174
Register Name:
RHPL
Register Description:
Receive HDLC Maximum Packet Length
Register Address:
03A0h
Bit #
7
6
5
4
3
2
1
0
Name
RHPL7
RHPL6
RHPL5
RHPL4
RHPL3
RHPL2
RHPL1
RHPL0
Default
0
Bit #
15
14
13
12
11
10
9
8
Name
RHPL15
RHPL14
RHPL13
RHPL12
RHPL11
RHPL10
RHPL9
RHPL8
Default
0
Note:
Bits that are underlined are read-only; all other bits are read-write.
Bits 0 to 15/Receive Bit-Synchronous HDLC Maximum Packet Length (RHPL0 to RHPL15). If the receive
octet length-detection enable (ROLD) bit is set to 1, the HDLC controller checks the number of received octets in
a packet to see if they exceed the count in this register. If the length is exceeded, the packet is aborted and the
remainder is discarded. The definition of “octet length” is everything between the opening and closing flags which
includes the address field, control field, information field, and FCS.
Register Name:
TH[n]CR, where n = 0 to 39 (one for each port)
Register Description:
Transmit HDLC Port [n] Control Register
Register Address:
See the Register Map in Section 4.6.
Bit #
7
6
5
4
3
2
1
0
Name
TABTE
TCFCS
TBF
TID
TCRC1
TCRC0
TIFS
TTRANS
Default
0
Bit #
15
14
13
12
11
10
9
8
Name
reserved
TZSD
TFG3
TFG2
TFG1
TFG0
Default
0
Note: Bits that are underlined are read-only, all other bits are read-write.
Bit 0/Transmit Transparent Enable (TTRANS). When this bit is set low, the HDLC controller generates flags
and the FCS (if enabled through TCRC0/1) and performs zero stuffing. When this bit is set high, the HDLC
controller does not generate flags or the FCS and does not perform zero stuffing.
0 = transparent mode disabled
1 = transparent mode enabled
Bit 1/Transmit Interfill Select (TIFS)
0 = the interfill byte is 7Eh (01111110)
1 = the interfill byte is FFh (11111111)
Bits 2, 3/Transmit CRC Selection (TCRC0/TCRC1). These bits are ignored if the HDLC channel is set to
transparent mode (TTRANS = 1).
TCRC1 TCRC0
ACTION
0
No CRC is generated
0
1
16-bit CRC (CCITT/ITU Q.921)
1
0
32-bit CRC
1
Illegal state
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