PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 204

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

XME
XRES
Notes:
4.1.7
Value after reset: 00
MDS2-0 Mode Select
Semiconductor Group
Transmit Message End
By setting this bit to "1" the processor indicates that the data block written last in the
XFIFO completes the corresponding frame. The ISAC-S terminates the transmission
by appending the CRC and the closing flag sequence to the data.
Transmitter Reset
HDLC transmitter is reset and the XFIFO is cleared of any data.
This command can be used by the processor to abort a frame currently in
transmission.
7
Mode Register
Determines the message transfer mode of the HDLC controller, as follows:
MDS2
After an XPR interrupt further data has to be written in the XFIFO and the
appropriate Transmit Command (XTF or XIF) has to be written in the CMDR
register again to continue transmission, when the current frame is not yet complete
(see also XPR in ISTA).
During frame transmission, the 0-bit insertion according to the HDLC bit-stuffing
mechanism is done automatically.
MDS1
H
MDS0
TMD
204
RAC
MODE
DIM2
Read/Write Address 22
DIM1
Register Description
DIM0
0
H