CN8478 Datasheet, PDF (88/221 Pages) Conexant Systems, Inc – Multichannel Synchronous Communications Controller (MUSYCC)

5.0 Memory Organization
5.1 Memory Architecture
CN8478/CN8474A/CN8472A/CN8471A
Multichannel Synchronous Communications Controller (MUSYCC™)
Figure 5-1. Shared Memory Model Per Channel Group
Group Base Pointer
Channel Group Descriptor
Tx Head Pointer – Ch 00
Tx Head Pointer – Ch.....
Tx Head Pointer – Ch 31
Tx Message Pointer – Ch 00
Tx Message Pointer – Ch .....
Tx Message Pointer – Ch 31
Rx Head Pointer – Ch 00
Rx Head Pointer – Ch ....
Rx Head Pointer – Ch 31
Rx Message Pointer – Ch 00
Rx Message Pointer – Ch ....
Rx Message Pointer – Ch 31
Tx Time Slot Map
Tx Subchannel Map
Tx Channel Config Table
Rx Time Slot Map
Rx Subchannel Map
Rx Channel Config Table
Global Configuration
Interrupt Queue
Group Configuration
Memory Protection
Message Length
Port Configuration
8478_021
Transmit Message List
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Data Buffer
Data Buffer
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Data Buffer
Receive Message List
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Buffer Descriptor
Data Buffer Pointer
Next Message Pointer
Data Buffer
Data Buffer
Data Buffer
* See Table 5-19 for structure of Message Descriptor.
5-2
Conexant
100660E