TC83220-0020
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC83220-0020
TC83220-0020 Single-Chip CMOS LSI for FL (fluorescent) Calculator
The TOSHIBA printing/display calculator circuit
TC83220-0020 is 10- or 12-digit calculator on single-chip CMOS
LSI.
TC83220-0020 can drive the printing machine (M2158II/
M2156II; EPSON) with magnet driver circuit, and can drive the
fluorescent display tube with DC-DC converter.
It contains a 4 K-word ROM, a 256 × 4-bit RAM.
Features
Operational Features
·
Print: 11 or 13 digits of data.
(including decimal point. 2 digits of operational
symbol.)
3 digits of commas.
·
Display: 10 or 12 digits of data. (including punctuation in each digit.)
1 digit of floating minus sign, memory load, error symbol.
3 digits of commas.
·
·
·
Decimal output: Decimal set lock key controls output format.
Fixed decimal setting (“0”, “1”, “2”, “3”, “4”, “6”), full floating decimal, and ADD mode.
Key input buffer: 8 stages
Function: 4 basic arithmetic functions (+,
−,
×, ÷).
Repeat addition and subtraction.
Automatic constants in multiplication, division, percent calculation, calculations.
Automatic percent add-on and percent discount calculation.
Memory calculation.
Automatic accumulating calculation.
Gross margin profit calculation.
Delta percent calculation.
Tax calculation.
Grand total calculation.
Two-key rollover.
·
·
·
Item counter: 0~999 count up or
−999~0~999
count up/down by depressing of
Punctuation: Commas for thousands on display
Kinds of touch key:
+,
−
key.
Weight: 4.12 g (typ.)
1
2003-02-28
TC83220-0020
·
Kinds of lock key: “NP” printing mode selectable switch.
“Σ” summation mode selectable switch.
“5/4” “CUT” “UP” rounding switch.
Fixed point mode selectable switch.
“0”, “1”, “2”, “3”, “4”, “6”, “F”, “A”.
“IC+” “IC±” item counter mode selectable switch.
“GT” grand total memory selectable switch.
“SET”, “CAL” tax memory selectable switch.
·
·
·
·
Duty of display: Duty = 1/17.77
Leading zero suppression
Trailing zero suppression
Tax calculation: +TAX
−TAX
SET
CAL
key is calculation for included tax.
key is calculation for excluded tax.
selects set mode for tax rate.
selects normal calculation mode.
SET
CAL
to
to
CAL
SET
stores number of display to tax memory.
recalls tax rate to display from tax memory.
Changing lock key from
Changing lock key from
Depression of
tax.
Depression of
tax.
+TAX
−TAX
following data key at CAL mode performs the calculating included
following data key at CAL mode performs the calculating excluded
Electrical Features
·
·
·
·
P-MOS output buffer with pull down resistor for direct driving of fluorescent display tube.
Oscillator/clock generator internal to chip.
Key board encoding internal to chip.
Dual in line package.
Protection
(1)
(2)
In the overflow condition, all key except “C”, “C/CE”, “CE”, “Feed”, “→” key are inoperative.
Key bouncing protection (at 4 MHz clock)
Key read in: 15 ms
Key off: 40 ms
Function Select
(1)
“10/12” selectable with auto power off mode
ON……….. 10-digits calculated
OFF……… 12-digits calculated
Speed of Calculation (at 4 MHz clock)
(1)
(2)
(3)
(4)
(5)
Addition
Multiplication
Division
Memory calculation
Percentage calculation
1+1+
× 999999999999 =
31.2 ms
26.8 ms
999999999999 ÷ 1 = 100.6 ms
999999999999 ÷ 1 M + 108.8 ms
1 × 999999999999%
35.2 ms
2
2003-02-28
Embedded System
京公网安备 11010802033920号
EEWORLD
