cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 98

• Manufacturer Part Number: cx28560
• Description: Hdlc Controller
• Manufacturer: Mindspeed Technologies

The CX28560 Memory Organization
5.2.1.2
Table 5-6. Device Configuration Descriptor
Table 5-7. DCD Field Descriptions
Table 5-8. EBUS Configuration Service Request Descriptor
5-8
Dword Number
dword 0
dword 1
dword 2
dword 3
OPCODE
SACKIEN
LENGTH
Shared Memory Pointer
Indirect Register Map
Address
Dword Number
dword 0
dword 1
dword 2
dword 3
Descriptor Field
Bit 31
OPCODE[31:27]
Bit 31
OPCODE[31:27]
Service Request Descriptors
Each SRD is 4 DWords. The SRDs used by the CX28560 are as follows:
Device Configuration Descriptor (DCD)
Table 5-6
Table 5-7
EBUS Configuration Descriptor (ECD)
Table 5-8
30+2
Size
14
22
1
5
• Device Configuration Descriptor (DCD)
• EBUS Configuration Descriptor (ECD)
• Channel Configuration Descriptor (CCD)
Reserved[31:24]
0 = SACK interrupt disabled.
Command requested by the host. (CONFIG_WR, CONFIG_RD)
1 = SACK interrupt enabled. An appropriate interrupt is generated after the command is
completed.
Number of double words in the memory transaction request. If ‘0’ the number of transfers
is 16 K. Therefore, it allows for any number of dwords from 1–16384.
Shared memory base address for a memory transaction request. The pointer is dword
aligned by concatenating two zeros to the LSB and making it a 32b pointer.
The register address for the configuation read or write request.
SACKIEN[26]
SACKIEN[26]
presents the structure of DCD.
describes these fields.
presents the EBUS Configuration Service Request Descriptor.
Mindspeed Technologies™
Advance Information
Reserved[25:19]
Shared Memory Pointer
Shared Memory Pointer
Reserved[25:14]
EBUS Base
Reserved
Reserved
INCDIS[18]
Indirect Register Map Address[23:2]
Description
BYTE
ENABLE[17:14]
LENGTH[13:0]
CX28560 Data Sheet
28560-DSH-001-B
LENGTH[13:0]
Bit 0
Bit 0
00
00
0
0