SAB82538 Datasheet, PDF (148/253 Pages) Infineon Technologies AG – ICs for Communications

Port Value Register Port A...D (READ/WRITE)
7
PVRA PVR7
SAB 82538
SAF 82538
HDLC Mode
0
PVR0 (03C/07C)
PVRB PVR7
PVR0 (0BC/0FC)
PVRC PVR7
PVR0 (13C/17C)
PVRD
0
0
0
0 PVR3
PVR0 (1BC/1FC)
Note: Unused bits have to be set to logical “0”.
Each PVR register is accessible via two channel addresses.
Each of the above bits is assigned to the corresponding Universal Port pin with the same
number (e.g. PVRA.0 to port pin PA0).
Read Access
PVR shows the value of all pins (input and output). Input values can be
separated via software by “AND”-ing PCR and PVR.
Write Access
PVR accepts values for all output pins (defined via PCR). Values written to
input pin locations are ignored.
Semiconductor Group
148