HI-6110 (REMOTE TERMINAL MODE)
REMOTE TERMINAL
INITIALIZATION
The HI-6110 is configured for Remote Terminal operation by
setting the BCMODE input low and the RTMODE input high. An
alternative is programming Control Register bit 2 (BCMODE) to a
"0" and programming Control Register bit 3 (RTMODE) to a "1".
These Control Register bits are logically ORed with their
corresponding input pins.
In Remote Terminal mode, the host controller first performs a
Master Reset to initialize the RT protocol engine and clear all
message registers and data FIFOs. This may be achieved by
pulsing the MR input high, or writing a "1" and then a “0” to Control
Register bit 0. The user must select a master clock (CLK)
frequency by programming Control Register bits 11 and 12. Refer
to the RT Register Formats section for a full description of
available registers and their functions in RemoteTerminal Mode.
Figure 2. shows a block diagram of the HI-6110 in Remote
Terminal mode.
Status Word
Parallel
to
Serial
Manchester
Encoder
TXINHA
TX
DATA
FIFO
BUSA
BUSA
Mode Data (W)
Bus A
Serial
to
Parallel
Manchester
Decoder
Transceiver
Bus A Word
Command Word 1
Command Word 2
D15-D0
Host
Data
Interface
CS
R/W
STR
RA3-RA0
FFEMPTY
RX
DATA
FIFO
Mode Data (R)
TXINHB
Status Word Rec'd
Bus B Word
BUSB
BUSB
Bus B
Serial
to
Parallel
Manchester
Decoder
Transceiver
VALMESS
ERROR
RFLAG
RCVA
RCVB
RCVCMDA
RCVCMDB
Status Register
Message
Status
Control Register
RT Error Register
Message Register
CLK
MR
BCSTART
BCMODE
RTMODE
Protocol
Control
RT Protocol Engine
RTA4-RTA0
RTAP
Terminal
Address
Figure 2. Block Diagram - Remote Terminal Mode
HOLT INTEGRATED CIRCUITS
12
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
