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TL16PC564B Arkusz danych(PDF) 1 Page - Texas Instruments |
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TL16PC564B Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 33 page TL16PC564B, TL16PC564BLV PCMCIA UNIVERSAL ASYNCHRONOUS RECEIVER TRANSMITTER SLLS225A – MARCH 1996 – REVISED FEBRUARY 1998 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Integrated Asynchronous Communications Element (ACE) Compatible With PCMCIA PC Card Standard Release 2.01 D Consists of a Single TL16C550 ACE Plus PCMCIA Interface Logic D Provides Common I-Bus/Z-Bus Microcontroller Inputs for Most Intel™ and Zilog™ Subsystems D Fully Programmable 256-Byte Card Information Structure (CIS) and 8-Byte Card Configuration Register (CCR) D Adds or Deletes Standard Asynchronous Communication Bits (Start, Stop and Parity) to or From Serial Data Stream D Independently Controlled Transmit, Receive, Line Status, and Data Set Interrupts D Subsystem Selectable Serial-Bypass Mode Provides Subsystem With Direct Parallel Access to the FIFOs D Fully Programmable Serial-Interface Characteristics: – 5-, 6-, 7-, or 8-Bit Characters – Even-, Odd-, or No-Parity Bit Generation and Detection – 1-, 1 1/2-, or 2-Stop Bit Generation – Baud-Rate Generation D Fully Prioritized Interrupt System Controls D Modem Control Functions D Provides TL16C450 Mode at Reset Plus Selectable Normal TL16C550 Operation or Extended 64-Byte FIFO Mode D Selectable Auto-RTS Mode Deactivates RTS at 14 Bytes in 550 Mode and at 56 Bytes in Extended 550 Mode D Selectable Auto-CTS Mode Deactivates Serial Transfers When CTS is Inactive D Available in 100 Pin Thin Quad Flatpack (PZ) Package description The TL16PC564B/BLV† is designed to provide all the functions necessary for a Personal Computer Memory Card International Association (PCMCIA) universal asynchronous receiver transmitter (UART) subsystem interface. This interface provides a serial-to-parallel conversion for data to and from a modem coder-decoder/digital signal processor (CODEC/DSP) function to a PCMCIA parallel data-port format. A computer central processing unit (CPU), through a PCMCIA host controller, can read the status of the asynchronous communications element (ACE) interface at any point in the operation. Reported status information includes the type of transfer operation in process, the status of the operation, and any error conditions encountered. Attribute memory consists of a 256-byte card information structure (CIS) and eight 8-byte card configuration registers (CCR). The CIS, implemented with a dual-port random-access memory (DPRAM), is available to both the host CPU and subsystem (modem), as are the CCRs. This DPRAM is used in place of the electrically erasable programmable read-only memory (EEPROM) normally used for the CIS. At power up, attribute memory 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 in order to take full advantage of the increased capacity when in the extended mode. In addition, eight of the UART registers have been mapped into the subsystem (modem) memory space as read-only registers. This allows the subsystem to read UART status information. A subsystem-selectable serial-bypass mode has been implemented to allow the subsystem to bypass the serial portion of the UART and write directly to the receiver FIFO and read directly from the transmitter FIFO. Interrupt operation is not affected in this mode. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas 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 Incorporated † Patent pending PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1998, Texas Instruments Incorporated |
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