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TC83220-0026
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC83220-0026
TC83220-0026 Single-Chip CMOS LSI for FL (fluorescent) Calculator
The Toshiba printing/display calculator circuit TC83220-0026 is 10-digit calculator on single CMOS LSI chip. TC83220-0026 can drive the printing machine (M-31; 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 digits of data. (including decimal point.) 1 digit of minus sign, operational symbol. 1-color printing (black). · Display: 10 digits of data. (including punctuation in each digit.) 1 digit of floating minus sign, memory load, error symbol, grand total memory load, 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.)
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TC83220-0026
· Kinds of lock key (refer to page 5.): “P/NP” printing mode selectable switch. (ON: printing mode. OFF: nonprinting mode.) “Σ” summation mode selectable switch. “5/4” “CUT” “UP” Rounding switch. (“5/4”: “CUT” and “UP” lock key off.) Fixed point mode selectable switch. “0”, “1”, “2”, “3”, “4”, “6”, “F”, “A”. (“A”: ADD mode. “F”: full floating mode, all decimal setting lock key off.) “IC+” “IC±” item counter mode selectable switch. “GT” grand total memory selectable switch. “SET/CAL” tax memory selectable switch. (ON: set mode. OFF: normal calculation mode.) · · · · Duty of display: Duty = 1/16 Leading zero suppression Trailing zero suppression Tax calculation (refer to page 5.): +TAX −TAX key is calculation for included tax. key is calculation for excluded tax. lock key selects set mode or normal calculation mode.
SET/CAL
Changing lock key from set mode to normal calculation mode stores number of display to tax memory. Changing lock key from normal calculation mode to set mode recalls tax rate to display from tax memory. Depression of +TAX following data key at normal calculation mode performs the calculating included tax. Depression of −TAX following data key at normal calculation mode performs the calculating excluded tax.
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. Shrink dual in line package
Protection
(1) (2) (3) Double depression of keys will be inoperative. 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: 17 ms Key off: 41 ms
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TC83220-0026
Pin Assignment (top view)
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TC83220-0026
System Diagram
C = 100 pF R = 1 kW ± 2% VP: Power source to drive printer. VKK: Power source for display. Note 1: FL CUT (R72) (VF1, VF2 cut at printing) Note 2: Connection to HOLD pin is shown in the following page 14.
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TC83220-0026
Connection of FL
Note 3: R62 digit (P20) of “E” data
Note 4: R62 digit (P22) of “-” data
Note 5: R62 digit (P23) of “M” data
Note 6: R62 digit (P21) of “GT” data
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TC83220-0026
Key Connection
Touch Key
Lock Key
Note 7: : Feed
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TC83220-0026
Operation Example
Key TAB F 4/5 4/5 IC OFF S OFF GT OFF MOD CAL Touch POWER··ON
···· C ···· 1+·· 2-·· ◊·· *·· · IC·· IC+ 1+·· 2-·· ◊·· · *·· · · IC·· OFF 3´·· 4¸·· =·· · · 5´·· 6%·· · · +·· · · 2¸·· 3%·· · · 2··MU/D· 3=·· · 1. + 2. -1. ◊ -1. * ···· 0. 1. + 2. 002········· -1. ◊ 002········· -1. * ···· 0. 3. ´ 4. ¸ 4. = 3. * ···· 5. ´ 6. % 0.3 * ···· + 5.3 % ···· 2. ¸ 3. % 66.66666666 * ···· 2. M 3. % = 0.06185567 * 2.06185567 * ···· 2D%·· 2. 2.06185567 2. 66.66666666 2. 5.3 2. 0.3 3. 5. -1. 0. 3. 12. -1. -1. 0. 1. -1. 0. 1. -1. -1. Print Display
Note 8: ........Paper feed
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TC83220-0026
Key TAB 4/5 IC S GT MOD Touch 3=·· 3. % = 1. * 50. * ···· F 4/5 OFF S OFF CAL 3´·· 4¸·· =·· 3. ´ 4. ¸ 4. = 3. + ···· 5´·· 6%·· 5. ´ 6. % 0.3 + ···· +·· + 5.3 % ···· 2¸·· 3%·· · 2. ¸ 3. % 66.66666666 + ···· 2··MU/D· 3=·· · · 2. M 3. % = 0.06185567 * 2..