hi-6110 Holt Integrated Circuits, Inc., hi-6110 Datasheet - Page 4

• Manufacturer Part Number: hi-6110
• Description: Bc / Rt / Mt Message Processor
• Manufacturer: Holt Integrated Circuits, Inc.

BUS CONTROLLER
The HI-6110 is configured for Bus Controller operation by setting
the BCMODE input high and the RTMODE input low. Alternatively,
Control Register bits 3:2 (RTMODE:BCMODE) may be
programmed to 0:1. Control Register bits 3:2 are logically ORed
with the input pins with the same signal name.
Figure 1. shows a block diagram of the HI-6110 in Bus Controller
mode
FFEMPTY
VALMESS
BCSTART
BCMODE
RTMODE
RA2-RA0
ERROR
D15-D0
RFLAG
RCVB
RCVA
STR
R/
RF0
RF1
CLK
MR
CS
W
Message
Interface
Protocol
Control
Status
Host
Data
BC Error Register
Control Register
Status Register
HI-6110 (BUS CONTROLLER MODE)
Figure 1. Block Diagram - Bus Controller Mode
Command Word 1
Command Word 2
Status Word 1
Status Word 2
HOLT INTEGRATED CIRCUITS
BC Protocol Engine
DATA
DATA
FIFO
FIFO
TX
RX
Mux
4
INITIALIZATION
In Bus Controller mode, the user must first perform a Master Reset
to initialize the BC protocol engine and clear all message registers
and data FIFOs. This may be achieved by pulsing the MR input
high, or writing a "1" to Control Register bit 0. The user must select a
master clock (CLK) frequency by programming Control Register
bits 11 and 12, and the Response Time Out must be programmed
per Control Register bit 14. Refer to the BC Register Formats
section for a full description of available registers and their
functions in Bus Controller Mode.
Bus B Word
Bus A Word
Parallel
Parallel
Parallel
Serial
Serial
Serial
to
to
to
Manchester
Manchester
Manchester
Encoder
Decoder
Decoder
Transceiver
Transceiver
BUSA
BUSA
BUSB
BUSB
TXINHA
TXINHB
Bus A
Bus B