User`s manual

TECHNICAL INFORMATION SECTION 15
Page 15-1 RPC-320
ELECTRICAL SPECIFICATIONS
CPU
80C320, 22.1184 Mhz clock
Memory
RPBASIC-52, 32K ROM, jumperable for 64K.
Type: 27C256 Access time: 80 ns or faster.
Program ming and data is 32K or 128K RAM standard,
512K Optional.
RAM optionally battery backed up. Battery life is 5-10
years depending upon RAM size, type, and oper ating
temperature and time.
Maximum BASIC program is 62K
Battery backed using DS1216DM , which also acts as a
real time clock. Can also use DS1213C or D to battery
back ram.
Digital I/O
The RPC -320 has 34 digital I/O lines. 24 are from J3,
which is a general pur pose port.
The specifications below are for digital I/O at P6 and J3
except for the eight high current lines at J3.
Drive current 2.5 ma maximum per line,
sink or source. TTL
compatible.
Output low voltage 0.45V m ax at 2.5 mA, 1V
max at 15 mA for opto rack.
Output high volts 2.4V minimum, sink or source
at rated current.
All digital input lines are TTL compatible.
High cu rrent ou tput at J3
8 of the 24 lines can drive up to 500 ma at 50V. Refer
to CHAPTER 6, D IGITAL AND OPTO PORTS for
limitations.
High current output at L8
L8 sinks up to 2 amperes at 50 Volts. Sw itching is
through a "zero" ohm FET switch.
Opto isolated input ISOA/ISOB
Isolated voltages to 250 volts peak may be applied to this
input. A series resistor is necessary for voltages above
12V.
Keypad input
10 lines accept a 16 position matrix keypad. Scanning
and debounce performed in RPBASIC-52.
Display output
14 digital and 6 power and ground lines used to control
LCD, VF , and LC D graphics displays. D isplays
supported in RPBASIC-52.
Serial ports
Two RS-232D serial ports. All have RxD, TxD , and
CTS lines. COM 0 has only these lines. COM1 also has
RTS. COM 1 configurable to RS-232 or RS-422/485.
Termination network for RS-422/485 available. Baud
rates from 300 to 38.4K are pr ogram mable. Length
fixed at 8 bits, no parity, 1 start and stop bit.
EPROM and programmer
Accepts 29C256, 29C010, 29C040 or equivalent flash
EPROM from Atmel.
Size: 32K (29C256), 128K(29C010), 512K(29C040)
Calendar/Clock
Optional DS-1216DM installed in socket U5.
Accur acy to 1 minute/m onth
Supported by RPBASIC
Expected life 3 to 5 years depending upon RAM size
installed, temperature, and operating time.
Watchdog timer, reset
Watch dog timer resets CPU when enabled.
Time between resets is 380 ms or 2.8 seconds
Push button reset. External reset through W10.
Power requireme nts
+ 5 ±5% at 95 ma operating.
Current consumption is less than 5 ma in IDLE 2 mode,
all components installed.
Current is less than 1 ma when analog and RS-485 chips
(U14, 15,16, and 9) are removed.
RS-232 voltages generated on card.
Current consumption does not include any opto-modules
or other accessories.