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| SAB82538 Datasheet, PDF (129/253 Pages) Infineon Technologies AG – ICs for Communications | |||
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Transmit Byte Count High (WRITE)
Value after RESET: 000xxxxx
7
XBCH DMA NRM CAS XC
XBC11
SAB 82538
SAF 82538
HDLC Mode
0
XBC8 (offset: 2B)
DMAâ¦
DMA Mode
Selects the data transfer mode of ESCC8 to/from System Memory.
0⦠Interrupt controlled data transfer (Interrupt Mode).
1⦠DMA controlled data transfer (DMA Mode).
NRMâ¦
Normal Response Mode
Valid in auto-mode only.
Determines the function of the LAP Controller:
0⦠full-duplex LAPB/LAPD operation
1⦠half-duplex NRM operation
CASâ¦
Carrier Detect Auto Start
When set, a high on the CD pin enables the corresponding receiver and
data reception is started. When not set, if not in Clock Mode 1 or 5, the CD
pin can be used as a general input.
XCâ¦
Transmit Continuously
Only valid if DMA Mode is selected.
If the XC bit is set, the ESCC8 continuously requests for transmit data
ignoring the transmit byte count programmed via XBCH, XBCL.
XBC11 â XBC8⦠Transmit Byte Count (most significant bits)
Valid only if DMA Mode is selected.
Together with XBCL (bits XBC7⦠XBC0), determine the length of the frame
to be transmitted.
Semiconductor Group
129
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