SAB82538 Datasheet, PDF (201/253 Pages) Infineon Technologies AG – ICs for Communications

Received Byte Count High (READ)
Value after RESET: 000xxxxx
7
RBCH DMA 0 CAS 0
see XBCH
RBC11
SAB 82538
SAF 82538
BISYNC Mode
0
RBC8 (offset: 2B)
DMA, CAS… These bits represent the read-back value programmed in XBCH
RBC11– RBC8… Receive Byte Count (most significant bits)
No function.
Transmit Byte Count High (WRITE)
Value after RESET: 000xxxxx
7
XBCH DMA 0 CAS XC XBC11
0
XBC8 (offset: 2B)
Note: Unused bits have to be set to logical “0”.
DMA…
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).
CAS…
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.
XC…
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– XBC8… Transmit Byte Count (most significant bits)
Valid only if DMA Mode is selected.
Together with XBCL (bits XBC7…XBC0), determine the number of
characters to be transmitted.
Semiconductor Group
201