
Agere Systems Inc.
103
Data Sheet
May 2001
and Packet Payload Engine
Ambassador T8110 PCI-Based H.100/H.110 Switch
10 Stream Rate Control
(continued)
10.1 H-Bus Stream Rate Control Registers
10.1.1 H-Bus Rate Registers
The H-bus rate registers control the serial data stream rate of operation for each of the H-bus stream groups,
A—H. The upper nibble controls groups B, D, F, and H. The lower nibble controls groups A, C, E, and G.
10.2 L-Bus Stream Rate Control Registers
10.2.1 L-Bus Rate Registers
The L-bus rate registers control the serial data stream rate of operation for each of the H-bus stream groups,
A—H. The upper nibble controls groups B, D, F, and H. The lower nibble controls groups A, C, E, and G. Local
streams have a 16.384 MHz rate option (refer to Section 10.2.2 on page 104).
Table 81. H-Bus Rate Registers
DWORD Address (20 bits)
Register
Byte 3
Byte 2
Byte 1
Byte 0
0x00300
H-bus rate H/G
H-bus rate F/E
H-bus rate D/C
H-bus rate B/A
Byte Address
0x00300
(0x00301)
(0x00302)
(0x00303)
Name
Bit(s) Mnemonic
7:4
HBRSN
(HDRSN)
(HFRSN)
(HHRSN)
3:0
HARSN
(HCRSN)
(HERSN)
(HGRSN)
Value
0000
0010
0100
1000
0000
0010
0100
1000
Function
H-bus Rate B/A
(H-bus Rate D/C)
(H-bus Rate F/E)
(H-bus Rate H/G)
H-bus group B(D, F, H) off (default).
H-bus group B(D, F, H) rate = 2.048 MHz.
H-bus group B(D, F, H) rate = 4.096 MHz.
H-bus group B(D, F, H) rate = 8.192 MHz.
H-bus group A(C, E, G) off (default).
H-bus group A(C, E, G) rate = 2.048 MHz.
H-bus group A(C, E, G) rate = 4.096 MHz.
H-bus group A(C, E, G) rate = 8.192 MHz.
Table 82. L-Bus Rate Registers
DWORD
Address (20 Bits)
Register
Byte 3
Byte 2
Byte 1
Byte 0
0x00320
L-bus rate H/G
L-bus rate F/E
L-bus rate D/C
L-bus rate B/A
Byte Address
0x00320
(0x00321)
(0x00322)
(0x00323)
Name
Bit(s) Mnemonic
7:4
LBRSN
(LDRSN)
(LFRSN)
(LHRSN)
Value
0000
0010
0100
1000
1001
0000
0010
0100
1000
1001
Function
L-bus Rate B/A
(L-bus Rate D/C)
(L-bus Rate F/E)
(L-bus Rate H/G)
L-bus group B(D, F, H) off (default).
L-bus group B(D, F, H) rate = 2.048 MHz.
L-bus group B(D, F, H) rate = 4.096 MHz.
L-bus group B(D, F, H) rate = 8.192 MHz.
L-bus group B(D, F, H) rate = 16.384 MHz.
L-bus group A(C, E, G) off (default).
L-bus group A(C, E, G) rate = 2.048 MHz.
L-bus group A(C, E, G) rate = 4.096 MHz.
L-bus group A(C, E, G) rate = 8.192 MHz.
L-bus group A(C, E, G) rate = 16.384 MHz.
3:0
LARSN
(LCRSN)
(LERSN)
(LGRSN)