參數(shù)資料
型號: SAF82525
廠商: INFINEON TECHNOLOGIES AG
英文描述: Data Communications ICs
中文描述: 數(shù)據(jù)通信集成電路
文件頁數(shù): 102/126頁
文件大小: 730K
代理商: SAF82525
Semiconductor Group
102
SAB 82525
SAB 82526
SAF 82525
SAF 82526
XBCH
(2D/6D)
7
3
DMA
NRM
CAS
XC
XBC11
XBC8
0
Transmit Byte Count High (WRITE)
Value after RESET: 000xxxxx
Selects the data transfer mode of HSCX to system memory.
0 … Interrupt controlled data transfer (interrupt mode)
1 … DMA controlled data transfer (DMA Mode)
DMA … DMA Mode
Valid in auto-mode only! Use in auto-mode only; reset this bit in non auto-mode, transparent
mode, and extended transparent mode.
Determines the function of the LAP controller:
0 … full-duplex LAPB/LAPD operation
1 … half-duplex NRM operation
NRM … Normal Response Mode
When set, a high at the CD (A
×
CLK) pin enables the respective receiver and data reception
is started.
CAS … Carrier Detect Auto Start
CAS has to be "0" for clock mode 1 and 5
Note:
Only valid if DMA mode is selected!
If the XC bit is set, the HSCX continuously requests for transmit data ignoring the transmit
byte count programmed via XBCH, XBCL.
XC … Transmit Continuously
Valid only if DMA mode is selected!
Together with XBC7 … XBC0 the length of the frame to be programmed.
XBC11 … XBC8 … Transmit Byte Count (most significant bits)
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