Remote Processing RPC-220 - Manual (Page 45)

TECHNICAL SPECIFICATIONS SECTION 15
Page 15-1
T E C H N I C A L SP E C I F IC A T I O N S SECT ION 15
CPU
Phillips 80C552 operating at 22.1184 M hz
Power Supply
Inputs: 5 ±0.25VD C or
6-16V (RPC -220 P/N 1715, 1720) or
5.4 to 21V (RP C-220 P/ N 1710)
Higher input voltage possible with heat sink.
C u r r en t: 1 8 0 m a ( P/ N 1 7 15 , 1 72 0 ) m a x im u m .
1 0 0 m a ( P/ N 1 7 10 ) m ax im u m .
Outputs not loaded.
5 m a m a xi m um , l ow e st po w er m o de (P / N
1710)
Curr ents measured without RS-232 attached.
Screw terminals provided for + 5V and external
high voltage inp ut.
Memory
E x te r na l R A M -
128K or 512K, depending upon model. 32K
accessible as code during development mode.
Code a ddress du ring deve lopment m ode is 0x8000 to
0xffff. All external RAM accessed using MOVX
type commands and by segment selecting.
RAM is battery backed up when real time clock
option is installed. Backup time varies with usage
and operating temperature. Backup time is estimated
at 4 to 6 years at 25°C, board not powered. Backup
t im e r e du c ed b y 5 0 % w h en o pe r a ti ng a t 5 0 °C .
Program EPRO M -
32K, Atm el type 29C256. T his is a PEROM and
does not need sector er ase. Howe ver, data is
written in 64 byte blocks.
Monitor included. This is written over after program
developm ent.
A 64K UV EP ROM (27C512 type) is possible. See
SECT ION 3, PROG RAM S LARG ER TH AN 32K
for modification instr uctions.
Analog Input
C h a nn e ls : 8
Resolution: 10 bits (about 5 m v/cou nt)
Range: 0 - 5V
I n pu t i m pe d an c e: 1 0 0K o hm s
Conversion time: 28 m icro-seconds
Reference:
Adjustable fr om abou t 4.8 to 5.2 volts
Analog Output
C h a nn e ls :
2
Resolution: Effectively 8 bits (20 mv)
Range: 0 - 5V Maximum output voltage, and
accura cy, dependen t upon 5V su pply
R i pp le : 20 mv P -P ma ximum at 50% duty
cycle, 4. 8 Khz PWM frequency
Output cur rent: 2 ma m aximum /chan nel, 4 ma total.
Response time: 300 milli-seconds or less
Analog outputs use PWM outputs. When an analog
output is used, its corresponding PWM output cannot be
used.
PWM O utput
C h a nn e ls : 2
Duty cycle: 0 to 100% 256 steps
Frequency: program mable from about 163 to 42 Khz.
Output cur rent: 4 ma m aximum , T TL co mpatible
PWM outputs generate analog outputs. When analog
output is used, its corr esponding P WM output cannot
be used.
Real Time Clock
Type: D S1689
A c cu r ac y :
1 min/month. This will vary
depending upon operating temperature.
Ac cu ra cy spe cif ied at 2 5°C
Interrupts: May g enerate an INT 1 when J3 -23 is
jumpered to J3-25. A lso used to wake
up card from low power mode.
Battery backup: Battery backs up RAM. Connector for
external battery provided when special
ordered without battery.
Operating life: Four to 6 years, depending upon
temperature and hum idity.
Reset
CPU resets when 5V supply falls below about 4. 65 volts.
Held in reset until supply rises to about 4.65 volts. Reset
time is about 300 ms. A pulse from the real time clock
resets CPU to wake it up from low power mode.
LCD Display Port