參數資料
型號: TS68302VR16
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Integrated Multiprotocol Processor IMP
中文描述: 16-BIT, 16.67 MHz, RISC MICROCONTROLLER, CPGA132
封裝: CERAMIC, PGA-132
文件頁數: 39/47頁
文件大?。?/td> 1149K
代理商: TS68302VR16
39
TS68302
2117A–HIREL–11/02
Main Controller
The main controller is a microcode RISC processor that services all the serial channels.
The main controller transfers data between the serial channels and internal/external
RAM, executes host commands, and generates interrupts to the interrupt controller.
Data is transferred from the serial channel to the dual-port RAM or to the external mem-
ory through the peripheral bus. If data is transferred between the SCC channels and
external memory, the main controller uses up to six serial DMA channels for the trans-
fer. The main controller also controls all character and address comparison and cyclic
redundancy check (CRD) generation and checking.
The execution unit includes the arithmetic logic unit (ALU), which performs arithmetic
and logic operations on the registers.
Serial Communication
Controllers
The TS68302 has three independent SCCs. Each SCC can be configured to implement
different protocols - for example, to perform a gateway function or to interface to an
ISDN basic rate channel. To simplify programming, each protocol implementation uses
identical data structures.
Five protocols are supported: high-level data link control (HDLC), binary synchronous
communication (BISYNC), synchronous/asynchronous digital data communications
message protocol (DDCMP), V.110, universal asynchronous receiver transmitter
(UART), and a fully transparent mode. To aid system diagnostics, each SCC may be
configured to operate in either an echo or loopback mode. In echo mode, the IMP
retransmits any signals received; in loopback mode, the IMP locally receives signals
originating from itself.
The clock pins (RCLK, TCLK) for each SCC can be programmed for either an external
or internal source, with user-programmable baud rates available for each SCC channel.
Each SCC also supports the standard modem control signals: request to send (RTS),
clear to send (CTS), and carrier detect (CD). Other modem signals may be provided
through the parallel I/O pins.
The SCC features are as follows:
programmable baud rate generator driven by the internal or external clock,
data may be clocked by the programmable baud rate generator or directly by an
external clock,
provides modem signals RTS, CTS, and CD,
Full-duplex operation,
Automatic echo mode,
Local loopback mode,
Baud rate generator outputs available externally.
The SCC HDLC mode key features are as follows:
flexible data buffers with multiple buffers per frame allowed,
separate interrupts for frames and buffers (receive and transmit),
four address comparison registers with mask,
maintenance of five 16-bit counters,
flag/abort/idle generation/detection,
zero insertion/deletion,
NRZ/NRZI data encoding,
16-bit or 32-bit CRC-CCITT generation/checking,
detection of non-octet aligned frames,
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