Specifications

PK2100 Series Z-World 530-757-3737 8
Interrupt Vectors
Most of the interrupt vectors can be altered under program con-
trol. These are the suggested and default vectors:
Addr Name Description
0x00
INT1_VEC Expansion bus attention INT1 vector.
0x02 INT2_VEC INT2 vector, can be jumpered to output of
the real-time clock for periodic interrupt.
0x04 PRT0_VEC PRT timer channel 0
0x06 PRT1_VEC PRT timer channel 1
0x08 DMA0_VEC DMA channel 0
0x0A DMA1_VEC DMA channel 1
0x0C CSIO_VEC Clocked serial I/O
0x0E SER0_VEC Asynchronous Serial Channel 0
0x10 SER1_VEC Asynchronous Serial Channel 1
Jump Vectors
Instead of loading the address of the interrupt routine from the
interrupt vector, the following interrupts cause a jump directly
to the address of the vector, which will contain a jump instruc-
tion to the interrupt routine. For example,
0x66 non-maskable power-failure interrupt
0x08 INT
0
, mode 0
0x38 INT
0
, mode 1
Interrupt Priorities from Highest to Lowest
Internal Trap(Illegal Instruction)
External NMI (non maskable interrupt, power failure)
External
INT0 (non-maskable, level 0)
External INT1 (non-maskable, level 1, expansion bus at-
tention line)
External INT2 (non-maskable, level 2)
Internal PRT timer channel 0
Internal PRT timer channel 1
Internal DMA channel 0
Internal DMA channel 1
Internal Clocked serial I/O
Internal Serial Port 0
Internal Serial Port 1
EEPROM
The parameters given here apply to the standard 24-volt
PK2100. See The 12-Volt PK2100 (page 9) for changes relating
to the 12-volt version.
Addr. Definition
0x000 Startup Mode. If 1, enter programming mode. If 8, execute
loaded program at startup.
0x001 Baud rate in units of 1200 baud.
0x100 Unit “serial number.” BCD time/date with the following for-
mat: second, minutes, hours, day, month, year.
0x106 Required power voltage. This value is 24 for standard
PK2100s and 12 for the 12-volt version.
0x107 Software test version (times 10). For version 1.2, this is 12.
0x108 Microprocessor clock speed in units of 1200 Hz (16-bits).
For
6.144 MHz clock speed, this value is 5120.
0x10C Bus address for networking. 16 bits.
0x10E Analog voltage reference units of 1 millivolt. 16 bits. 10300
for 10.300 volts.
0x110 Excitation resistor values for universal inputs 1–6. These are
the pull-up resistors to the +
10V reference. Six integers in
units of 0.5 ohm. 6600 for 3.3K resistors.
0x11C Pull-down resistor values for universal inputs 1–6. Six inte-
gers in units of
0.5 ohm. 9400 (4.7K ohms).
0x128 4–20 mA load resistor. Resistance in units of 1/2 ohm. The
nominal value is
780 (2 counts/ohm x 390 ohms). This rep-
resents the combined resistance of the load resistor and the
pull-down resistor in parallel.
0x12A Reserved
0x130 11 values relating to internal DAC. First value is output volt-
age when nominal output is zero. Additional values are out-
put voltage increment (above offset) when input value is
1,
2, 4... 256, 512. Stored as integers expressed in 0.5 millivolt
units.
0x146 11 values relating to external DAC. First value is output volt-
age when nominal output is zero. Additional values are out-
put voltage increment (above offset) when input value is
1,
2, 4... 256, 512. Stored as integers expressed in 1/2 millivolt
units.
0x15C For the standard PK2100, this is current in units of 0.001 mA
corresponding to voltage output of 2.000V when is set for 0-
20 mA output into nominal 392 ohm load resistor. Typically,
near 4000. For the 12-volt PK2100, the output range is 0-15
mA.
0x15E For the standard PK2100, this is current in units of 0.001 mA
corresponding to voltage output of 10.000 volts when is set
for
0-20 mA output into nominal 392 ohm load resistor. For
the
12-volt PK2100, the output range is 0-15 mA.
0x160 With shorting jumper H7 connected, these are 16-bit num-
bers a0 and a1 high-gain plus-side inputs in the gain for-
mula
y = a1 x (x1 + a0)
with the minus side grounded. If the minus side is not
grounded, the formula is
y = a1 x ( x1 + a0 ) – b1 x x2.
where b1 is the minus-side gain and can be computed from
the calibration constants stored at location
0x164. The value
y is the output of the high-gain amplifier read with universal
input channel
7. The value x1 is the plus-side input read
with universal input channel
8 and x2 is the minus-side in-
put.
The coefficient a0 is signed and is in units of 0.01 mV. The
coefficient a1 is the unsigned dimensionless gain expressed
in units such that a gain of
10 is equal to 2000.
0x164 With shorting jumper H7 removed, these are 16-bit numbers
a0 and a1 high gain plus-side input in the gain formula
y = a1 x (x1 + a0)
with the minus side grounded. If the minus side is not
grounded, the formula is
y = a1 x ( x1 + a0 ) – b1 x x2.
where b1 is the minus-side gain and can be computed as
a1–1.
0x168 Reserved
0x16A Resistance of excitation resistor for high-gain plus input in
ohms. Nominal value
10K. An unsigned integer.
0x16C Long coefficient relating speed of microprocessor clock
relative to speed of real-time clock. Nominal value is
107,374,182 which is 1/40 of a second microprocessor clock
time on the scale where 2
32
is 1 second. This requires 4
bytes of EEPROM, stored least byte first.