PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 303

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

Semiconductor Group
}
switch (ctrl & 0x03)
{
case PT_MD_EXT_TRANSP:
case PT_MD_TRANSP:
case PT_MD_AUTO:
case PT_MD_NON_AUTO:
case 0x3:
pt->pt_rx_frame = PT_FR_TR;
ctrl
break;
if (pt->pt_rx_cnt > 0)
sapi = *ptr++;
if (pt->pt_rx_cnt < 2)
else
tei
ctrl
if (pt->pt_op_mode == PT_MD_TRANSP)
else
break;
if (pt->pt_op_mode == PT_MD_AUTO)
ctrl = (WORD) inp (pt->pt_r_rhcr);
break;
Two = FALSE;
if (pt->pt_rx_cnt == 0)
{
pt->pt_rx_cnt--;
frame_status = MUTILATED;
pt->pt_rx_cnt -= 2;
pei |= 0x20;
pei |= 0x30;
AutoM = ((rsta & 0x0D) == 0x09) ? TRUE : FALSE;
if (!AutoM)
pt->pt_rx_frame = PT_FR_U;
break;
= 0x00L;
= *ptr++;
= (WORD) *ptr++;
pei |= 0x10;
/* no address recognition, SAPI
/* and TEI are the first two bytes
/* of data
/* high byte address recognition,
/* TEI is the first byte read
/* read TEI and control field
/* full address recognition in
/* AUTO/nonAUTOMODE read only the
/* HDLC control field information
/* AUTOMODE link ???
/* the (first byte of the) control
/* field is in register RHCR
/* determine the frame type
/* ========================
/* *** HDLC U frame **
/* one byte control field !
303
Low Level Controller
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