CHAPTER 5 DATA MEMORY

5-1

Figure 5-1 Memory location

CHAPTER SYNOPSIS

 Battery backup description

 Where and how to store variables

 Saving and retrieving data from F lash

 Installing 512K RAM

 Discussion about corrupted da ta

DESCRIPTION

DATA MEMORY CHAPTER 5

The RP C-2350 is usually installed w ith 128K of RA M in

socket U2. A n optional 512K can be installed. RAM is

battery backed on both models.

This chapter discusses saving and retrieving variables

from RAM and Flash EPROM and running assembly

language progr ams.

If program and data are battery backed, the UNNEW

command may be used to try to restore the program.

Variables used by the Basic program are cleared,

however. Certain variab les are pr eserved and data

POKEd into RAM is saved.

BATTERY BACKUP

Battery life is about 3 years (27,000 hours). See

additional information a few paragraphs below.

Battery B1 is used to back up the RAM and real time

clock

The installed battery is rated for 190 mA-hours. RAM

(any size) typically requires 1-2 micro-amps in standby.

The clock requires typically 3 micro-amps. Assuming 7

micro-Amps of current draw, you could expect 3 years

life from the battery (assuming the board was off the

whole time.)

The problem with calculating battery life are variables

beyond our reasonable control. First, memory

manufacturers specify a ‘typical’ current of 1 to 2 micro-

amps and a maximum of 100 (high temperature

operation). Other factors affecting battery life include

operating temperature, clock chip, and time the RPC-

2350 has power applied to it. You can expect the battery

to last between 3 to 5 years for operation at 25°C. At

50°C, life is about half as much. This is due to battery

deterioration and CMOS leakage increases at higher

temperatures.

Humidity also affects battery life. Very high humidity

(in conjunction with a dirty environment) increases

leakage. Low humidity drys out the batter y seal,

allowing contaminates to enter.

The point of this explanation is to give you the factors

affecting battery life. Under the best of conditions, life

is 7 years. Under worse conditions, it could be as low

as 3 months. You can add a larger battery as described

below.

Existing battery voltage is measured across W14.

Alternate battery

A larger 3. 0V batter y can be installed by connecting it to

W14. Be sure to remove the existing battery. Note the

polarity marked on the board.

STORING VARIABLES IN RAM

The term "var iables" in this context includes numb ers,

strings, arrays, recipes, and formulas as applied to your

application.

CAMBASIC provides 26 “protected” variables, A%-

Z%, that are not erased on power up. These are

accessed like other BASIC variables.

The Flash EPROM may be used to store variables or

constants, such as text strings, to help reduce the size of

the main program.

CAM BASIC m emory map

The following diagram is a memory map for the RPC-

2350.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 82 83

Comentários a estes Manuais

Sem comentários

Raypak Commercial Space Heating and Domestic Water Handbücher

Bedienungsanleitungen und Benutzerhandbücher für Wasserkocher Raypak Commercial Space Heating and Domestic Water.
Wir stellen 1 PDF-Handbücher Raypak Commercial Space Heating and Domestic Water zum kostenlosen herunterladen nach Dokumenttypen zur Verfügung Bedienungsanleitung

Raypak Commercial Space Heating and Domestic Water Bedienungsanleitung (6 Seiten)

Marke: Raypak | Kategorie: Water boiler | Größe: 0.56 MB |

Inhaltsverzeichnis

ADB Advanced Design Boiler

EFFICIENCY

ELIABILITY

LEXIBILITY

THE ADVANCED DESIGN BOILER

RAYPAK CORPORATE OFFICE AND

Weitere Produkte und Handbücher für Wasserkocher Raypak

Modelle	Dokumententyp
2100 - 4001 EN	Bedienungsanleitung Raypak 2100 - 4001 EN User Manual, 2 Seiten
HI DELTA 992B-2342B	Bedienungsanleitung Raypak HI DELTA 992B-2342B User Manual [en] , 66 Seiten
Raytherm - Type WH 962-1826	Bedienungsanleitung Raypak Raytherm - Type WH 962-1826 User Manual, 2 Seiten
181-401	Bedienungsanleitung Raypak 181-401 User Manual, 2 Seiten
RayTherm Commercial Boilers And Water Heater	Bedienungsanleitung Raypak RayTherm Commercial Boilers And Water Heater User Manual, 4 Seiten
WH-135	Bedienungsanleitung Raypak WH-135 User Manual, 2 Seiten
XFYRE 300-850	Bedienungsanleitung Raypak XFYRE 300-850 User Manual, 2 Seiten
185	Bedienungsanleitung Raypak 185 User Manual [it] , 14 Seiten
1334001	Bedienungsanleitung Raypak 1334001 User Manual, 52 Seiten
XFYRE NINETY PLUS 500	Bedienungsanleitung Raypak XFYRE NINETY PLUS 500 User Manual, 8 Seiten
0042B	Bedienungsanleitung Raypak 0042B User Manual, 6 Seiten
1005	Bedienungsanleitung Raypak 1005 User Manual, 56 Seiten
751-1501	Bedienungsanleitung Raypak 751-1501 User Manual, 2 Seiten
135A	Bedienungsanleitung Raypak 135A User Manual, 28 Seiten
503-2003	Bedienungsanleitung Raypak 503-2003 User Manual, 60 Seiten
MVB 5042004	Bedienungsanleitung Raypak MVB 5042004 User Manual [en] [ru] [cs] , 56 Seiten
H-0135B	Bedienungsanleitung Raypak H-0135B User Manual, 4 Seiten
RAYTHERM 0133-4001	Bedienungsanleitung Raypak RAYTHERM 0133-4001 User Manual, 41 Seiten
1005-2005	Bedienungsanleitung Raypak 1005-2005 User Manual, 2 Seiten
335	Bedienungsanleitung Raypak 335 User Manual [en] [ru] [de] [es] [fr] [it] [pl] [cs] , 1 Seiten

Remote-processing RPC-2350 Manual do Utilizador Página 27

Comentários a estes Manuais

Manuais e produtos relacionados com Computadores Remote-processing RPC-2350

Raypak Commercial Space Heating and Domestic Water Handbücher

Raypak Commercial Space Heating and Domestic Water Bedienungsanleitung (6 Seiten)

Inhaltsverzeichnis

Weitere Produkte und Handbücher für Wasserkocher Raypak