SAB82538 Datasheet, PDF (115/253 Pages) Infineon Technologies AG – ICs for Communications

SAB 82538
SAF 82538
Status Register (READ)
Value after RESET: 48_H
7
HDLC Mode
0
STAR XDOV XFW XRNR RRNR RLI CEC CTS WFA (offset: 20)
XDOV…
XFW…
XRNR…
RRNR…
RLI…
CEC…
Transmit Data Overflow
More than 32 bytes have been written to the XFIFO.
This bit is reset by:
– a transmitter reset command XRES
– or when all bytes in the accessible half of the XFIFO have been moved
into the inaccessible half.
Transmit FIFO Write Enable
Data can be written to the XFIFO.
Transmit RNR (significant in auto-mode only!)
Indicates the status of the ESCC8.
0… receiver ready
1… receiver not ready
Received RNR (significant in auto-mode only!)
Indicates the status of the remote station.
0… receiver ready
1… receiver not ready
Receive Line Inactive
Neither FLAGs as Interframe Time Fill nor frames are received via the
receive line.
Note: Significant only in point-to-point configurations.
Command Executing
0…no command is currently being executed, the CMDR register can be
written to.
1… a command (written previously to CMDR) is currently being executed,
no further command can be temporarily written in CMDR register.
Note: CEC will be active at most 2.5 transmit clock (or master clock)
periods. If the ESCC8 is in power down mode CEC will stay active.
Semiconductor Group
115