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參數(shù)資料
型號: W6692
廠商: WINBOND ELECTRONICS CORP
元件分類: 通信及網(wǎng)絡(luò)
英文描述: PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器)
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP100
封裝: 14 X 20 MM, 2.75 MM HEIGHT, QFP-100
文件頁數(shù): 69/84頁
文件大小: 473K
代理商: W6692
W6692
Publication Release Date: October 1998
- 69 -
Revision A1
LOV Message Length Overflow
Used in transparent mode only. A "1" in this bit indicates a received message
4097 bytes. This bit is
valid only after RME interrupt and is cleared by the RACK command.
RBC12-8 Receive Byte Count
Used in transparent mode only. Five most significant bits of the total number of bytes in a received
frame. These bits are valid only after a RME interrupt and remain valid until the frame is
acknowledge via the RACK bit.
Note: The frame length equals RBC12-0. This length is between 1 to 4096. After a RME interrupt, the number of data available
in B1_RFIFO is frame length modulus threshold.
Remainder = RBC12-0 MOD threshold
no. of available data = remainder if remainder
0 or
no. of available data = threshold if remainder = 0
The remainder equals RBC5-0 if threshold is 64.
8.3 B2 HDLC controller
Table 8.5 Register address map: B2 channel HDLC
OFFSET
ACCESS
REGISTER NAME
DESCRIPTION
C0
R
B2_RFIFO
B2 channel receive FIFO
C4
W
B2_XFIFO
B2 channel transmit FIFO
C8
W
B2_CMDR
B2 channel command register
CC
R/W
B2_MODE
B2 channel mode control
D0
R_clear
B2_EXIR
B2 channel extended interrupt
D4
R/W
B2_EXIM
B2 channel extended interrupt mask
D8
R
B2_STAR
B2 channel status register
DC
R/W
B2_ADM1
B2 channel address mask 1
E0
R/W
B2_ADM2
B2 channel address mask 2
E4
R/W
B2_ADR1
B2 channel address 1
E8
R/W
B2_ADR2
B2 channel address 2
EC
R
B2_RBCL
B2 channel receive frame byte count low
F0
R
B2_RBCH
B2 channel receive frame byte count high
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