background image

8

9 IC278

10

ØnD0•Ø

12

IC233

11

13

5

IC233

2

3

IC234

8

10

9

4

IC234

12

11

13

5

4

2

3

8

10

9

11

12

13

IC244

N248

11

12

13

IC278

13

1

3

2 IC235

1 12

11 IC235

13

9

8 IC235

10

N222

2
3
4

12
11
10

IC243

4

n8

n4
n8

8

9

10

IC232

2

3

1

IC244

13

1

2
3
4

12
11
10

IC242

n1
n2

4

13

1

2
4
3

8
6

12
11
10

9

5

2

n2

1

n2

1

4
3
2

5
8

9

6

2

1

n8

n1

n1

n2

6

5

4

IC244

8

9 IC221

10

1

n1

2

n2

4

n4

n8

n1

n2

4

n8

n8

N264

2

3

1

IC276

N204

N212

N228

N216

nDP0

N210

N272

N206

N208

N214

nDP6

nDP5

IC243

IC242

IC241

IC241

IC241

IC231

IC231

n1

nDP2

nDP1

nDP4

nDP3

5

6 IC235

2

1

4

8

9 IC244

10

N270

OP

DP<8

DP>6

DPR8

DPR4

DPR2

DPR1

to Display Latch

2
3
4

0

6

N367

nDP0
nDP2
nDP3
nDP4
nDP6

2
3
4

0

6

N363

DP>2
DP>3
DP>4
DP>6

DP>4

DP>3

DP>2

DP>6

6

J

K

Q

nQ

nC

1

J

K

Q

nQ

6

J

K

Q

nQ

1

J

K

Q

nQ

N362

nDP2

nDP3

nDP4

nDP5

nDP6

nDP0

nDP1

to

Display

decimal 

points

N347

N105

N107

N109

N115

N113

N111

N103

DPNE 

 to Q Flag

DPGT 

 to Q Flag

to Q Flag

DPR

to X Register & Arithmetic 

nDP2

nDP3

nDP4

nDP5

nDP6

nDP0

nDP1

NK13

NK12

NK20

IC387

4

5

3

2

6

12

11 IC367

13

IC387

13

1

10

9

8

1

IC388

2
3

13

11

12

6

IC388

8
5
4

10

9

12 11

nØD15

X

CDDnØD15

CDX

CDY

CDS16

CDS10

CDD

Y

ASUM16

ASUM10

Facit  1123  Calculator

Section: Decimal Point Register & Q Flag

 Page: 9

Rendition: 2014 Mar 6

N104

12

1

OP

13

12
10
11

8

9

10

IC245

IC231

DP>6
DP<8

3

IC246

2

4
5

6

2

13 IC266

M5962

ØB1p

N255 N355

2

6

IC273

5
4
3

N261 N364

CQXYD

IC379

9

10

13

1

8

YP1

1

2

3 IC389

IC379

3

2

4

5

6

9

8
6
5

IC378

13

10
12
11

IC378

X

X

CQX

CQY

OP•ØD0•B4p

nOP•ØD14p

n(OP•ØD0•B2p)

1

2
3
4

IC380

13

11

12 IC389

10

8

9 IC389

4

6

5 IC389

CQXNZ

DPNE

CQDNE

DPGT

CQDGT

Q

nQ

9

5
6
8

IC380

ØB1

CQXB1

11

IC358

12

10

9

13

11

12 IC370

X

nOP•ØD14p

ØB8

CQXB1

Y4

Y8

nX1
nX2
nX4
nX8

OP

13

nX=0

Q Flag

Decimal Point Register

nC

nC

nC

NR12

NR13

NR20
NR21
NR28
NR22
NR23

NK21
NK27
NK22
NK23

NK24
NK11
NK25
NK26

NR24
NR11
NR25
NR26

Summary of Contents for 1123

Page 1: ...Arithmetic 10 Display Latch Display 11 Power Supply 12 Timing Diagram 13 IC Pinouts Physical Layout 14 Connectors 15 Facit 1123 Calculator Facit 1123 Calculator Section Title and Contents Page 1 Rend...

Page 2: ...ng Master timing Master clock from which all timing is derived This is the basic bit rate B Bit timing D0 D15 Digit Timing 16 digit intervals D2 D15 are the displayed digit time periods Registers do n...

Page 3: ...c Control 14 Nixie Displays Keyboard 43210987654321 Y Register 60 bits Decimal Point Register 4 bits decoder p Bx bit timing Dx digit timing Timing OP clock rate selection Display Latch 4 bits VCC log...

Page 4: ...IC161 5 4 3 N108 n D0 n1 n2 n4 n8 1 n2 n4 n8 n1 2 n4 n8 1 2 n4 n8 n1 n2 4 n8 1 n2 4 n8 n1 2 4 n8 1 2 4 n8 n1 n2 n4 8 1 n2 n4 8 n1 2 n4 8 1 2 n4 8 n1 n2 4 8 1 n2 4 8 n1 2 4 8 1 2 4 8 9 12 4 5 3 2 1 n1...

Page 5: ...25 S11 nQ nKCLR nD nZS nRC nZC nM to X Register NK10 NK36 NK43 NK45 nP0 NK18 M M MR MC 12 IC246 9 10 11 B24 B48 12 11 IC245 13 13 p 5 6 IC236 4 9 8 IC236 10 2 3 1 IC236 11 12 IC236 13 N249 OP B1p D0 5...

Page 6: ...nQ n S30 Q n S11 N nQ a d n S23 M 11 IC365 6 4 5 8 3 2 1 12 CSCC n S30 Q n S31 nQ n S33 M Q n S32 M Q n S33 D Q n S31 Q N340 N239 11 13 IC375 10 12 9 e b nKCLR CYS16 N339 N241 N269 N368 N266 10 5 6 4...

Page 7: ...31 1 11 12 IC331 13 8 9 IC331 10 1 n1 2 n1 n2 1 n2 n1 2 1 2 n2 IC312 12 11 13 3 2 9 8 3 2 IC322 IC322 6 IC312 9 10 8 4 5 1 6 5 4 12 11 IC322 IC322 11 12 IC321 13 2 3 IC321 1 8 9 IC321 10 5 6 IC321 4 1...

Page 8: ...C232 5 6 IC221 4 3 2 IC221 1 11 12 IC221 13 9 8 IC247 10 9 11 12 IC269 13 8 IC269 10 11 12 IC228 IC227 IC226 IC225 IC224 IC223 IC222 13 9 9 9 9 9 9 9 12 11 1 nDL2 nDL4 OP n D15 nD0 3 2 4 IC258 OP 1 2...

Page 9: ...play decimal points N347 N105 N107 N109 N115 N113 N111 N103 DPNE to Q Flag DPGT to Q Flag to Q Flag DPR to X Register Arithmetic nDP2 nDP3 nDP4 nDP5 nDP6 nDP0 nDP1 NK13 NK12 NK20 IC387 4 5 3 2 6 12 11...

Page 10: ...15 N352 D15 13 10 11 12 IC359 N343 N245 1 2 3 IC360 4 5 6 IC360 N346 N247 10 9 8 IC360 X X CAD15 CS10S1 CAX CBY CAY CSCC CSTC CBX CBD CA15 nX1 ASUM10 to X Z DP Registers nX4 nX8 CSCC nX1 1 10 9 IC264...

Page 11: ...P3 nDP4 nDP5 nDP6 B1 V a2 V a2 V a2 V a2 V a2 V a2 V a2 V a2 Facit 1123 Calculator Section Display Latch Display Page 11 Rendition 2014 Mar 6 nDL4 6 5 11 12 13 N119 20K IC111 100pF N220 8 9 10 11 12 1...

Page 12: ...64 365 374 376 383 384 385 121 122 131 132 141 151 161 162 246 273 315 319 329 333 342 352 358 375 386 368 388 M5330 7 14 231 237 241 242 243 258 316 323 335 341 351 353 359 361 377 378 380 M5340 7 14...

Page 13: ...480 520 560 600 640 0 S Dn DISP 40 KHz nDISP 100 KHz DISP 625 Hz nDISP 1563 Hz D0 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 one full number cycle in registers Digit held in display latch after B1p 14...

Page 14: ...cc 5V 0V GND M5320 M5310 M5373 J K K J nQ Q Q nQ nC nC Vcc 5V 0V GND M5304 M5352 M5391 Vcc 5V 0V GND Vcc 5V 0V GND Vcc 5V 0V GND Vcc 5V 0V GND Vcc 5V 0V GND D Q 14 13 12 11 10 9 8 1 2 3 4 5 6 7 14 13...

Page 15: ...P 37 38 Z 37 38 CSTC CSTC 37 38 Z nDL8 39 40 CYS16 39 40 CSCC CSCC 39 40 nDL8 nDL4 41 42 NR remote NR remote NR remote X ENB 41 42 nOP D14p CYS16 41 42 nDL4 GND 43 44 GND 1 key 1 17 nMANUAL 30 key DP...

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