IS200TBAOH1B BOARD GE ANALOG

Description

GE General Electric Technical Specifications: IS200TBAOH1B

The module is IS200TBAOH1B

designed around the Mostek MK3887™ (Z80-SI0) which

IS200TBAOH1B provides two full-duplex serial data channels. Eachchannel

has an independent programmable Baud rate clock

generator to increase module flexibility. Each channel is

capable of handling asynchronous, synchronous, and

synchronous bit-oriented protocols such as IBM BiSync,

SOLC, and HOLC. It can generate CRC codes in any

synchronous mode and can be programmed by the CPU for

any traditional asynchronous format. The IS200TBAOH1B serial input and

output data is fully buffered and is provided at the connector

as RS-232-C levels. A modem control section is also

provided for handshaking and status. The module can be

jumper-configured as a data terminal or as a modem in

order to facilitate a variety of interlace configurations.

Figure 2 is a block diagram of the DCC-BOE module which

consists of eight main elements: The bus interlace and

address decode circuitry, the crystal clock and its associated

IS200TBAOH1B conditioning circuitry, the counter timer circuitry (CTC), the

serial input/output circuitry (510), the non-return-zero

inverted (NRZI) encode/decode circuitry, the channel

configuration headers, the RS 232-C interlace circuitry, and

the port configuration headers.

The bus interlace consists of both uni/bi-directional buffers

which reduces the DCC-BOE load on the bus to one LS-TTL

load. The address decoders, in addition to being buffered,

are jumper selectable to any one of the available 16 port

boundaries in the ZBO I/O map. The DCC-80E contains

command registers that are programmed to select the

desired operational mode. The addressing scheme is as

follows: (The X indicates the binary code necessary to

represent which one of the 16 port addresses is selected.)

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