Remote Processing RPC-220 - Manual (Page 5)

OVERVIEW SECTION 1
Page 1-2
26 Pin Connector P in Out
MANUAL CONVENTIONS
Information appearing on your screen is shown in a
different type. Exam ple:
Remote Pr ocessing Debug Monitor
For RP C-220
Version 1. 0
Type ' H' for command sum mary
NOTE:
Text unde r this headin g is helpful infor mation. It is
intended to act as a reminder of some operation or
interaction with another device that may not be obvious.
WARNING:
Information under this heading warns you of situations
which might cause catastrophic or irreversible damage.
Wx[a-b] Denotes jumper block pins. [a-b] ar e the
pins to connec t.
< xxx> Paired angle brackets are used to indicate a
specific function key on your PC keyboard. For
example < esc> means the escape key.
Jx-N Designates a pin number on a connector.
' C' convention ge nerally use s hexadecim al to designate
addresses and decimal for data. Any hexadecimal
numbers are r epresented by standard 0xNN notation.
Decimal does not have any special notation.
C o n ne c to r O ri e nt a ti on a nd N u m be r in g Sc h em e
The RP C-220 uses ID C type (0. 1" center ) connectors.
Shrouded conn ectors are ke yed to protect against rev erse
i ns ta l la t io n . T he y al so ta k e u p a l ot of r oo m . T h e R P C -
220 has silk screen marks on the board to indicate the
key on the co nnector . P ins 1 and 2 ar e indicated on a ll
of the larger co nnectors.
IDC type connectors (J1-5) follow a pin out numbering
scheme shown below. View is component side. Square
pad (pin 1) is found on the circuit side.
Counting scheme is the same fo r 10, 16, and 20 pin
connectors.
Terminology
" A - D "
Shorthand for analog-to-digital converter. The A -D
"measures" a voltage and converts it into a binary
numbe r. On the RP C-220, this numbe r is from 0 to
1023.
" f la sh E PR O M "
Technically, the EPRO M used in the RP C-220 is a
PER OM . U nlike a flash, a sector d oes not have to
be erased before written to. Unlike an EEPROM
(electrically erasable PROM), 64 bytes are written
at a time. EPROM, flash, and flash EPROM are
used interc hangeably in this manua l.
"MOVX"
refer s to the 8051 asse mbly lang uage instru ction to
read or write to external memory. This manual uses
t he te r m to r ef e r t o a n y e x te r na l R A M o r I / O
access.
"I/O"
are input- output devices . O n the RP C-220, this
includes the RTC, expansion port, RA M segment
set, and flash EPRO M. I/O is an accessing mode
enabled w hen CP U por t P4. 0 is low. When n ot in
the I/O mode, external RAM is selected.
" R T C "
is the optional real time clock in U8.
"segm ent"
is a 64K block of RAM . U p to 8 segments,
numbered 0 - 7, are available. The 8051 CPU series
accesses RAM in 64K blocks. The limitation is due
to the limited number of address lines. The
RPC -220 bank switches RA M in 64K segm ents.