mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 593

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.7.5.6.2 SIRP Indication When RDM = 01. For the receiver, RAPTRx is used,
depending on the portion of the serial interface RX RAM that is currently active. For the
transmitter, TAPTRx is used, depending on the portion of the serial interface TX RAM that
is currently active. If the corresponding VTx or VRx bit is set, then:
16.7.6 IDL Interface Operation
The full-duplex ISDN interchip digital link (IDL) interface is used to connect a physical layer
device to the MPC823. The basic and primary rate of the IDL bus is supported by the
MPC823. In the basic rate of IDL, data on three channels (B1, B2, and D) is transferred in a
20-bit frame, providing 160kbps full-duplex bandwidth. The MPC823 is an IDL slave device
that is clocked by the IDL bus master (physical layer device) and has separate receive and
transmit sections. The MPC823 supports one IDL bus as illustrated in Figure 16-56.
MPC823
• RAPTR1 contains the address of the currently active RX RAM entry. The serial
• RAPTR2 contains the address of the currently active RX RAM entry. The serial
• TAPTR1 contains the address of the currently active TX RAM entry. The serial interface
• TAPTR2 contains the address of the currently active TX RAM entry. The serial interface
interface RAM receive address block that is used is 0–63 and the CRORA bit is set to
0 in the SISTR.
interface RAM receive address block that is used is 64–127 and the CRORA bit is set
to 1 in the SISTR.
RAM transmit address block that is used is 128–191 and the CROTA bit is set to 0 in
the SISTR.
RAM transmit address block that is used is 192–255 and the CROTA bit is set to 1 in
the SISTR.
Figure 16-56. IDL Bus Application Example
ISDN TE
Freescale Semiconductor, Inc.
IDL1
For More Information On This Product,
INTERFACE
MPC823 REFERENCE MANUAL
S/T
Go to: www.freescale.com
INTERFACE
S/T
INTERFACE
S/T
Communication Processor Module
NT
INTERFACE
U
INTERFACE
U
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