HD64570F 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD64570F

Serial Communications Adaptor

Hitachi -> Renesas Electronics 

1.3 Basic Functions

Table 1.1 Major Functions of the SCA

Item

MSCI (multiprotocol

serial communication

interface)

Bus interface

Specification

Maximum data transfer 7.1 Mbits/s (f = 10 MHz)

rate

12 Mbits/s (f = 16.7 MHz)

5.7 Mbits/s (f = 8 MHz)*

Number of channels 2

Operating modes

Normal operating mode (full duplex)

Auto echo mode

Local loop back mode

Protocol functions

Asynchronous: 5 to 8 bits, parity (odd, even, or

none)

Byte synchronous: mono-sync, bi-sync, or

external synchronization

Bit synchronous: HDLC mode

Error detection

Five types (parity error, framing error, CRC error,

overrun error, underrun error)

Transmission codes Five types (NRZ, NRZI, FM0, FM1, Manchester)

FIFO

Transmit32 bytes/receive32 bytes

Clock sources

Internal clock sources:

1. On-chip baud rate generators can generate

arbitrary baud rates (independent transmit/

receive baud rate generators are provided for

each channel)

2. On-chip digital PLL (independent ADPLLs for

each receive channel)

Modem control

ADPLL (Advanced

digital PLL)

External clock

CTS, RTS, DCD

On-chip advanced digital PLLs:

1. For extraction of clock signals

2. For suppressing noise in received data and

clock signals

Baud rate generator

MPU modes

On-chip (independent transmit and receive baud

rate generators for each channel)

Four externally selectable modes:

1. 8086-system 16-bit MPU

2. 64180-system 8-bit MPU

3. 68000-system 16-bit MPUI

4. 68000-system 16-bit MPUII

Data bus width

Address bus width

8 or 16 bits

24 bits

Rev. 0, 07/98, page 2 of 453

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