Introduction
The T8110 is Agere Systems Inc.’s newest addition to the Ambassador series of computer telephony integrated circuits. This device not only has the capabilities of previous members of the Ambassador series but also extends them by providing a flexible interface for switching packet payloads between a local PCI bus and the H.100/H.110 buses. Packets may also be switched between the local PCI bus and local TDM streams. This part is intended to work with a coprocessor for providing header, framing, and checksum generation. Since the T8110 operates purely on payloads, multiple protocols such as IP, ATM, and A-Bis can therefore be supported simultaneously. To reduce system integration costs, support for non-PCI devices is provided through a minibridge.

FEATUREs
■ 4,096-connection unified switch
■ Packet payload engine supports up to 512 virtual channels
■ Full H.100/H.110 support (32 data lines, all clock modes)
■ 32 local I/O lines (2, 4, 8, or 16 Mbits/s)
■ PCI interface: combined master/slave with burst
■ Microprocessor interface: Motorola*/Intel† modes
■ Minibridge with programmable chip selects
■ Interrupt controller with external inputs
■ Eight independent general-purpose I/O lines
■ Eight independently programmed framing signals
■ Four local clocks
■ T1/E1 rate adaptation
■ Two clock-fallback modes
■ Stratum 4/4E and AT&T 62411 MTIE compliant
■ Incorporates 38 H.100 and 34 H.110 termination resistors
■ Subrate switching of 4 bits, 2 bits, or 1 bit
■ Backward compatible to all T810x devices
■ JTAG/boundary-scan testing support
■ BSDL files available
■ Assists H.110 hot swap
■ Single 3.3 V supply with 5 V tolerant inputs and TTL compatible outputs
■ 272 PBGA package
■ Evaluation boards available, PCI and CompactPCI‡ Hot Swap