PEB20571 INFINEON [Infineon Technologies AG], PEB20571 Datasheet - Page 119

• Manufacturer Part Number: PEB20571
• Description: ICs for Communications
• Manufacturer: INFINEON [Infineon Technologies AG]

4.7.4
The following GHDLC features related to the HDLC protocol may be selected in HDLC
mode:
• Collision Detection: May be active or inactive (relates only to the transmit direction)
• Flags / Ones Interframe: Flags or Ones are transmitted between each frame (relates
• Shared / Unshared Flag: In shared flag mode only one flag separates adjacent
• CRC Mode: Three possible settings: 16-bit CRC / 32-bit CRC / No CRC (relates to
• Push-Pull / Open drain: In push pull mode a pin may be driven to ‘1’ or ‘0’. When in
4.7.5
The GHDLC is connected to the following DELIC interface lines:
Figure 4-13 GHDLC Interface Lines
Serial data is transceived over the LRxD/LTxD lines. The line clock can be driven by an
external GHDLC device or can be generated internally by the PCM clocking path. The
selected internal clock is also driven outward via LCLK.
4.7.5.1
LTSC is the external tri-state control line. When LTSC is high LTxD is disabled and in
high impedance state. When LTSC is low, LTxD may take on values 0 or 1 when in push
pull mode, 0 or high impedance when in open drain mode.
Preliminary Data Sheet
to both the transmit and receive direction)
Note that transmitted messages always use unshared flags.
messages (relates only to the receive direction)
both the transmit and receive directions, and only when operating in the HDLC mode).
open drain mode a pin may be driven to ‘0’ or high z.
GHDLC Protocol Features
External Configuration and Handshaking in Bus Mode
External Tri-State in Point-to-Multi-Point Mode
GHDLC
4-35
LTSC
LTxD
LRxD
LCxD / CTS
LCLK
/ RTS
Functional Description
PEB 20571
DELIC
2003-08