cn8223 Mindspeed Technologies, cn8223 Datasheet - Page 108

• Manufacturer Part Number: cn8223
• Description: Atm Transmitter/receiver With Utopia Interface
• Manufacturer: Mindspeed Technologies

3.0 Registers
3.5 Receive Control Registers
0x1D–0x24—HDR_MSKx_12, HDR_MSKx_34 (Receive Header Mask Register)
The Receive Header Mask registers for port x (where x can be 0 to 3) are located at addresses 0x1D–0x24.
register causes the corresponding bit in the received ATM cell header to be disregarded for screening. For
example, setting HDR_MSK0_12, bit 0 to 1 causes ATM cells to be accepted to port 0 with either 1 or 0 in the
octet 1, bit 0 position. Combinations of Receive Header Mask bits can select groups of ATM VPI/VCIs for each
of the four ports. The same cells can be sent to more than one port. Setting all bits to 1s overrides the contents of
the Receive Header Value register. HDR_MSKx Register addresses are listed in
Table 3-10. HDR_MSKx Register Addresses
HDR_VAL0_34, HDR_VAL1_34, HDR_VAL2_34, HDR_VAL3_34
3-22
15–8
7–0
15–8
7–0
These registers modify the ATM cell screen in the Receive Header Value register. Setting a bit in the Mask
Bit
Bit
Address
0x1D
0x1E
0x20
0x21
0x22
0x23
0x24
0x1F
Field
Field
Size
Size
8
8
8
8
Header Value—Octet 1
Header Value—Octet 2
Header Value—Octet 3
Header Value—Octet 4
Register Name
Name
HDR_MSK0_12
HDR_MSK0_34
HDR_MSK1_12
HDR_MSK1_34
HDR_MSK2_12
HDR_MSK2_34
HDR_MSK3_12
HDR_MSK3_34
Name
Receive Port X ATM Header Mask Value—Octet 1
Receive Port X ATM Header Mask Value—Octet 2
Receive Port X ATM Header Mask Value—Octet 3
Receive Port X ATM Header Mask Value—Octet 4
Conexant
Receive Port 0 ATM Header Mask—Octets 1, 2
Receive Port 0 ATM Header Mask—Octets 3, 4
Receive Port 1 ATM Header Mask—Octets 1, 2
Receive Port 1 ATM Header Mask—Octets 3, 4
Receive Port 2 ATM Header Mask—Octets 1, 2
Receive Port 2 ATM Header Mask—Octets 3, 4
Receive Port 3 ATM Header Mask—Octets 1, 2
Receive Port 3 ATM Header Mask—Octets 3, 4
ATM Transmitter/Receiver with UTOPIA Interface
Description
Description
Description
Table
3-10.
CN8223
100046D