TL16PC564BLVPZ

TL16PC564BLVPZ description

The TL16PC564B/BLV is designed to provide all the functions necessary for a Personal Computer MemoryCard International Association (PCMCIA) universal asynchronous receiver transmitter (UART) subsysteminterface. This interface provides a serial-to-parallel conversion for data to and from a modemcoder-decoder/digital signal processor (CODEC/DSP) function to a PCMCIA parallel data-port format. Acomputer central processing unit (CPU), through a PCMCIA host controller, can read the status of theasynchronous communications element (ACE) interface at any point in the operation. Reported statusinformation includes the type of transfer operation in process, the status of the operation, and any errorconditions encountered.Attribute memory consists of a 256-byte card information structure (CIS) and eight 8-byte card configurationregisters (CCR). The CIS, implemented with a dual-port random-access memory (DPRAM), is available to boththe host CPU and subsystem (modem), as are the CCRs. This DPRAM is used in place of the electricallyerasable programmable read-only memory (EEPROM) normally used for the CIS. At power up, attributememory is initialized by the subsystem.The TL16PC564B/BLV uses a TL16C550 ACE-type core with an expanded 64 × 11 receiver first-in-first-out(FIFO) memory and a 64 × 8 transmitter FIFO memory. The receiver trigger logic flags have been adjusted inorder to take full advantage of the increased capacity when in the extended mode. In addition, eight of the UARTregisters have been mapped into the subsystem (modem) memory space as read-only registers. This allowsthe subsystem to read UART status information.A subsystem-selectable serial-bypass mode has been implemented to allow the subsystem to bypass the serialportion of the UART and write directly to the receiver FIFO and read directly from the transmitter FIFO. Interruptoperation is not affected in this mode.Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.Intel is a registered trademark of Intel System, Inc.Zilog is a registered trademark of Zilog IncorporatedMicroStar BGA is a trademark of Texas Instruments Incorporated.���������� ���� ����������� �� ������� �� �� ����������� ������������� ������� �� �������������� ��� ��� ����� �� ����� ������������������� ��������� ���������� ���������� ���� ��� ����������� �������������� �� ��� �����������Copyright  1996 – 2003, Texas Instruments Incorporated