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Page: 12 / 17

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Sharp Compet 17 Calculator

Section: Decimal Point Counters

Page: 12

Rendition: 2020 May 20

Ø2

6-12

DA1

QA8

ØT

8

9

3

Ø C

4

Ø3

ØR

2

Ø2

6-12

DB1

QB8

ØT

6

7

Ø C

Ø3

ØR

CPXPX

2-11

2

1

4

3

P

5

E

PX

E

CPXPW

2-10

3

4

1

2

CPXD1

ØD1

5

CPXD13

2-10

11

10

9

8

CPXDPØD

DPØD

7

E

2SC458

5K

cpx

ØnB8

Ø1

Ø2

4-7

D

Q

ØT

2

10

5

Ø C

11

Ø3

ØR

1

CPXØnD13

2-7

1

2

3

4

5

CPXØD13

7

5

1-5

ØnD13

ØD13

nP

11

1

1-7

nPXI

NL35

NK8

PW

ØD13

Ø2

6-11

DA1

QA8

ØT

8

9

3

Ø C

4

Ø3

ØR

2

Ø2

6-11

DB1

QB8

ØT

6

7

Ø C

Ø3

ØR

E

PW

E

CPWPW

2-6

3

4

1

2

CPWPX

PX

5

CPWPY

2-6

11

10

9

8

CPWDPØD

DPØD

7

PY

2SC458

5K

cpw

CPWØG

2-11

9

8

11

10

7

CPWØnG

9

3

1-5

G

nG

2SC458

5K

ØnB8

Ø1

83

nP

cpy

Ø2

6-10

DA1

QA8

ØT

8

9

3

Ø C

4

Ø3

ØR

2

Ø2

6-10

DB1

QB8

ØT

6

7

Ø C

Ø3

ØR

PX

2-4

9

8

11

10

CPYPX

7

E

PY

E

11

1

1-3

D

83
83

84

84
84

PXI

E

E

E

D

E

E

D

E

D

NR8

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Summary of Contents for Compet 17

Page 1: ...Outputs 9 Registers 10 Arithmetic 11 Decimal Point Counters 12 Display 13 Power Supply 14 Timing Diagram 15 IC Pinouts Gate Construction 16 Physical Layout and Connectors 17 Sharp Compet 17 Calculator Sharp Compet 17 Calculator Section Title and Contents Page 1 Rendition 2020 May 20 This schematic has been derived through reverse engineering This is not the manufacter s schematic nor is it based o...

Page 2: ...e pulse at the end of each full number cycle Keyboard K The keyboard and numeral encoder P Indicates a number cycle during which processing occurs Control S C The state machine C Multiply or divide operation pending D Divide operation pending F G J M S Assorted state flags S Assorted internal state signals IDLE 1 during display and simple operations 0 during multi cycle operations CX Outputs from ...

Page 3: ... bits VCL Keyboard Control CARRY Arithmetic BCD serial adder 4 bits C Flag D Flag M Flag S Flag F Flag J Flag G Flag State Sequencing S1 S6 CX CA CB X Outputs 1 of 10 Decoder and Drivers Timing Numeral Encoder K0 K9 KNUM M W X KNDP Decimal Point Driver logic supplies display supplies V 90D V 90 V 190 Power Supply 000987654321 Decimal Point PX Ring Counter Ø3 XC1 XC2 XC4 XC8 W X CSUB CTC Arithmetic...

Page 4: ... 3 B Q3 2 B Q4 1 B ØnB1 3 ØnB4 5 3 D1 ØT 7 6 ØC 8 Q1 4 B Q2 3 B Q3 2 B Q4 1 B ØnB1 3 ØnB4 5 4 D1 ØT 7 6 ØC 8 Q1 4 Q2 3 Q3 2 Q4 1 ØnD2 ØnD3 NL40 ØnD4 NL38 ØnD5 NL42 ØnD6 ØnD7 NL44 ØnD8 ØnD9 ØnD10 ØnD11 NL11 ØnD12 NL9 ØnD13 NL7 NL17 8 4 1 1 2SC458 1K ØnB1 3 100K Ø3 B B B B 2SC458 15K NL5 ØnD1 NL15 ØnD2 ØnD3 ØnD4 ØnD5 ØnD6 ØnD7 ØnD8 ØnD9 ØnD10 ØnD11 ØnD12 ØnD13 7 5 1 2 ØD1416 NL6 ØnD16 NL16 10 2 1 6 ...

Page 5: ...95 96 96 96 96 94 94 94 93 93 93 92 92 92 KNUM 3 1 Ø2 4 6 D Q ØT 2 10 5 ØC 11 Ø3 ØR 1 7 5 1 7 KCLR E D Øn D16 B8 1 7 12 2 Ø2 4 6 D Q ØT 3 9 ØC Ø3 ØR E Øn D16 B8 1 4 1 7 12 5 Ø2 4 6 D Q ØT 4 8 5 ØC 7 Ø3 ØR 1 E Øn D16 B8 1 nP P 0 047 100K E E NK40 E D D D D D D IDLE 300K VCL 98 4 98 3 98 2 98 1 91 1 91 2 91 3 91 4 97 1 97 2 97 3 97 4 d45 d30 d29 d46 d31 d26 d27 d28 d42 d33 d32 NR40 NK35 NK27 IDLE nD...

Page 6: ... 7 14 7 8 KEQ nC D 7 14 2 3 KEQ nC nD 8 4 1 3 D KEQ C nD 4 7 5 1 3 D 7 12 10 9 KNP nM nS KNP 7 13 10 9 KS nC nD KS 11 KMD KCLR S2 nF J nM K 67 4 S2 nF J nM K KCLR 67 67 1 67 2 67 3 68 4 68 68 1 68 2 68 3 25 2 KRC KEQ KNP nM nS 25 25 3 25 4 14 4 S2 F J 25 1 KNDP M S M 8 KMR 16 1 KCLR KMD S KMAS 16 16 2 16 3 16 4 S2 nF J nM 17 1 S2 nF J nM KMS 17 17 3 17 4 17 2 27 3 KRC KMD S KEQ 27 27 1 27 4 27 2 K...

Page 7: ... 3 3 11 10 8 9 ØnD16 ØB8 W E 7 2 8 4 3 1 2 Øn D16 B8 1 5 PX 9 3 1 4 nG G D G nG 7 5 1 4 nF D nF nJ nF J F nJ F J M 5 E KCLR 7 12 7 8 11 KNP F nF nF nF J J Ø1 15 1 S3 KEQ nC D S6 nF nJ 23 15 2 15 3 15 4 KDP S4 nF nJ S1 nF J M 13 4 23 1 23 2 S6 nF J 23 3 S5 nF J KEQ C D S1 nF J nM 23 4 33 1 58 2 MUL M nS d6 MUL nM nS 22 1 S6 F J S4 F J SCa 22 22 2 22 3 22 4 KEQ S2 F J S2 F nJ 26 1 26 2 26 3 KCE 26 4...

Page 8: ... 5 D Q ØT 4 8 5 ØC 7 Ø3 ØR 1 E CPA 7 9 J 2 3 1 S1 nJ 7 9 5 4 7 9 10 9 11 7 9 7 8 S1 nF J nM 7 11 10 9 11 7 11 7 8 S2 nF J nM Ø2 4 5 D Q ØT 3 9 ØC 11 Ø3 ØR E CPA 7 10 5 4 1 7 10 2 3 7 10 7 8 11 7 10 10 9 Ø2 4 5 D Q ØT 2 10 ØC Ø3 ØR E CPA S3 H IDLE to P generator KEQ nC D KEQ C D S4 F J 12 1 12 12 3 12 4 12 2 K K S2 F nJ K K S2 nF J M KEQ nC nD d16 d44 K S6 nF J 38 3 42 1 K K K K K K KEQ C nD C D S2...

Page 9: ...KMD S CPWØnG 57 4 SCh KNDP M S nC nD KCLR KMD S K S5 F J SCf 44 1 45 1 35 4 CPWPX CXØD11 SCm SCf SCg MUL nM nS S2 nF nJ KCE S2 F J SCc SCm K SCg S1 F J 48 1 49 1 32 1 CTC K CWW SCm MUL M nS 31 2 58 3 35 2 SCh KNDP M S nC nD KCLR KMD S 66 66 1 66 2 66 3 SCf 32 2 SCm CWØ 66 4 MUL nM nS K M 2 G S6 nF J D1 G D2 13 2 SCk S1 nF J M K 14 3 37 2 d17 S2 F J CMØ KMC 24 4 SCa SCm SCe 41 31 4 41 1 41 2 nP KNP...

Page 10: ... ØT 6 7 ØC Ø3 ØR Ø2 6 2 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 2 DB1 QB8 ØT 6 7 ØC Ø3 ØR Ø2 6 1 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 1 DB1 QB8 ØT 6 7 ØC Ø3 ØR W E CWW 2 1 3 4 1 2 CWX X 5 E 2SC458 5K 4 5 7 5 MØ CPM Ø2 6 6 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 6 DB1 QB8 ØT 6 7 ØC Ø3 ØR Ø2 6 5 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 5 DB1 QB8 ØT 6 7 ØC Ø3 ØR Ø2 6 4 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 4 DB1 QB8 ØT 6...

Page 11: ... 3 D Q1 4 D XC4 XC3 XC2 XC1 3 1 ØB8 CTC 4 1 3 2 5 E E CARRY H 7 3 11 7 9 8 10 H Ø2 4 1 D Q ØT 4 8 ØC Ø3 ØR E 2 1 9 8 10 11 7 E Ø1 ØnB8 H 7 4 1 3 5 2 4 CSUB Six Generator Tens Carry Detector Carry Latch Operand Adder CSUB 7 3 1 2 4 3 5 7 2 11 8 10 7 9 7 2 1 2 4 3 5 Normalisation Adder Sum H 8 7 4 E 9 10 7 11 Ø1 XØ 11 1 1 6 D CSUM ØnD1 A In B In Normalisation Carry Latch Check pin numbers and orderi...

Page 12: ... ØT 2 10 5 ØC 11 Ø3 ØR 1 CPXØnD13 2 7 1 2 3 4 5 CPXØD13 7 5 1 5 ØnD13 ØD13 nP 11 1 1 7 nPXI NL35 NK8 PW ØD13 Ø2 6 11 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 11 DB1 QB8 ØT 6 7 ØC Ø3 ØR E PW E CPWPW 2 6 3 4 1 2 CPWPX PX 5 CPWPY 2 6 11 10 9 8 CPWDPØD DPØD 7 PY 2SC458 5K cpw CPWØG 2 11 9 8 11 10 7 CPWØnG 9 3 1 5 G nG 2SC458 5K ØnB8 Ø1 83 nP cpy Ø2 6 10 DA1 QA8 ØT 8 9 3 ØC 4 Ø3 ØR 2 Ø2 6 10 DB1 QB8 ØT 6 7 Ø...

Page 13: ... 2SC857 110K 2SC857 110K 2SC857 110K 2SC857 110K 2SC857 110K 2SC857 110K 2SC857 10K 2SC458 10K 10K 2SC458 10K 10K 2SC458 10K 10K 2SC458 10K 9 3 1 2 XC2 NL2 9 10 7 1 n4 4 10 2 1 2 XC3 NL1 3 2 7 1 n8 8 11 1 1 2 XC4 NL3 4 5 7 1 8 4 1 2 XC1 NL4 10K 2SC458 10K 2SC857 1K n4 n8 2 n4 n2 4 2 4 1S84 ØnB1 3 6 2SC458 40K 2SC458 ØnD1 ØnB1 3 110K 2SC458 20K 20K 50K 200pF Ø3 40K 11 ØnD1 ØnB1 3 b b 1 B B A A A A ...

Page 14: ...pF red blue 20 35V 1K 1W 10 315V NM11 NM10 NM6 NM5 NM3 NP2 VDD 0 047 250V 3K 1K NL29 NL30 17V NL27 NL28 NL31 NL32 brown grey white 9 10 9 7 5 7 8 7 13 Unused Elements NK42 µPD7 6 12 ØnB1 3 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 3 1 3 2 3 3 1 1 1 2 1 3 1 4 1 5 1 6 1 7 4 1 4 2 4 3 4 4 4 5 4 6 4 7 5 1 5 2 5 3 5 4 5 5 5 6 6 1 6 2 6 3 6 7 6 8 6 9 6 4 6 5 6 6 6 10 6 11 6 12 7 2 7 3 7 4 7 5 7...

Page 15: ...1 9 KHz ØB1 ØB2 ØB4 ØB8 744 Hz ØnD1 ØnD2 ØnD16 16 1 PXI 80 120 160 200 240 280 320 360 400 440 480 520 560 2 3 4 5 6 7 8 9 10 11 12 13 14 X One full number cycle in registers Digit being displayed ØDn 1 LSD 2 3 4 5 6 7 8 9 10 11 12 MSD ØnB1 3 600 640 0µS 15 16 X and PXI with 000987654321 in the display logic 0 24V logic 1 0V GND ...

Page 16: ...VDD D 50K to VDD E 100K to VDD H 150K to VDD J 300K to VDD K 300K to VCL nn 470K to VCL internal to TDA002 unit nn a 40K to GND b 60K to GND c 100K to GND d 300K to GND Occasionally individual MOSFET transistors or MOSFETs contained in µPD7 ICs are used as AND gates The gate of these transistors functions as an inverted input Because the MOSFET is a bidirectional device a diode is usually required...

Page 17: ...mponent side view NP01 NP06 1 1 5 5 5 4 5 3 5 2 5 1 1 2 7 1 Sharp Compet 17 Calculator Section Physical Layout and Connectors Page 17 Rendition 2020 May 20 03 04 05 01 Italicised expressions are connections with no signal name in the schematic ØnDx signals on the NK and NR connectors have a diode between the connector and the actual signal See the Keyboard page The NK and NR connector pins are num...

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