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OVERVIEW SECTION 1

Page 1-2

26 Pin Connector Pin Out

MANUAL CONVENTIONS

Information appearing on your screen is shown in a

different type. Example:

Remote Processing Debug Monitor

For RP C-220

Version 1.0

Type ' H' for command sum mary

NOTE:

Text under this heading 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] are the

pins to connect.

< 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 represented by standard 0xNN notation.

Decimal does not have any special notation.

Connector Orientation and Numbering Scheme

The RPC-220 uses ID C type (0. 1" center ) connectors.

Shrouded connectors are keyed to protect against reverse

installation. They also take up a lot of room. The RPC-

220 has silk screen marks on the board to indicate the

key on the connector. Pins 1 and 2 ar e indicated on a ll

of the larger connectors.

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 for 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

number. On the RP C-220, this number is from 0 to

1023.

"flash EPROM"

Technically, the EPRO M used in the RP C-220 is a

PEROM. U nlike a flash, a sector does 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 interchangeably in this manual.

"MOVX"

refers to the 8051 assembly language instruction to

read or write to external memory. This manual uses

the term to refer to any external RAM or I/O

access.

"I/O"

are input-output devices. On the RPC-220, this

includes the RTC, expansion port, RAM segment

set, and flash EPROM. I/O is an accessing mode

enabled when CP U port P4. 0 is low. When not in

the I/O mode, external RAM is selected.

"RTC"

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.

1 2 3 4 5 6 7 8 9 10 ... 46 47

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