Agere Systems Inc.
47
Data Sheet
May 2001
and Packet Payload Engine
Ambassador T8110 PCI-Based H.100/H.110 Switch
6 Operating Control and Status
(continued)
n
Soft reset 4: Reset the interrupt in-service register only.
n
RESET_PENDING_MEM: Reset the virtual channel NOTIFY_PENDING memory.
n
RESET_QUEUE: Reset the virtual channel NOTIFY_QUEUE FIFO.
6.1.2 Master Output Enable Register
The master output enable register is used to control master output enables to various groups of T8110 signals,
including the following:
L-bus data streams (L_D[31:0])
L-bus clocks
(L_SC[3:0], FG[7:0] when used as frame group outputs)
H-bus data streams (CT_D[31:0])
H-bus clocks (CT_C8_A, /CT_FRAME_A, CT_C8_B, /CT_FRAME_B, CT_NETREF1,CT_NETREF2, /C16+,
/C16–, /C4, C2, SCLK, /SCLKx2, /FR_COMP)
GPIO (GP[7:0])
FGIO (FG[7:0] when used as programmable register outputs)
Minibridge (MB_A[15:0], MB_CS[7:0], MB_RD, MB_WR, MB_D[15:0])
T8110 outputs that are not
programmatically enabled (i.e., always driven except during reset) include the following:
CLKERR, SYSERR, PRI_REF_OUT, NR1_SEL_OUT, and NR2_SEL_OUT.
Table 22. Reset Registers
Byte
Address
Name
Bit(s) Mnemonic
Value
Function
0x00100
Soft Reset
7:0
SRESR
0000 0000
0000 0001
0000 0010
0001 0000
0010 0000
0100 0000
1000 0000
0000
0
1
0
1
0
1
0
1
NOP (default value).
Reset all registers and connection valid flags.
Reset all registers.
Reset interrupt pending and in-service registers.
Reset interrupt in-service register only.
Reset virtual channel NOTIFY_PENDING memory.
Reset virtual channel NOTIFY_QUEUE.
NOP (default).
Disable PCI reset to minibridge (default).
Enable PCI reset to minibridge.
Disable PCI reset to back end (default).
Enable PCI reset to back end.
Disable hard reset to back end.
Enable hard reset to back end (default).
Disable soft resets to back end.
Enable soft resets to back end (default).
0x00101
Reset Select
7:4
3
Reserved
PMBEB
2
PRBEB
1
HRBEB
0
SRBEB