1

2

P1 RC2014 BUS

A

A15 A14 A13 A12 A11 A10 A9 A8

1 2 3 4 5 6 7 8

17 15 13 11 8 6 4 2

C

TX RX USR1 USR2 USR3

10 GND

17

+5V

1 2 3 4 5 6

ON

D0 D1 D2 D3 D4 D5 D6 D7

/ P=Q 19

5 6

B

/M1 /RESET CLK /INT /MREQ /WR /RD /IORQ

1 /OE

SW1 ADDRESS

4

5V

Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0

12 11 10 9 8 7

C2 100nF

16 19 18 14 17 15 12 6 10

/CE CS1 CD0 /M1 /RESET CLK /INT /RD /IORQ

27 28 29 30 31 32 33 34

25 26 27 28 1 2 3 4

D0 D1 D2 D3 D4 D5 D6 D7

BCT3

1

JP1 IEI

2

1

JP2 IEO

P2 INTEN

IEI 1 IEO 2

C4 100nF

R1 470k

R2 470k

CTC

24 Vcc

19 20 21 22 23 24 25 26

35 36 37 38 39

C3 100nF

U2 Z80 CTC

+5V

VCC

18

5

+5V

C1 100nF

18 16 14 12 9 7 5 3

1 2 3

GND

11 12 13 14 15 16

P7 P6 P5 P4 P3 P2 P1 P0

4

+5V

RP1 8x10k

20 VCC

9 A7 10 A6 A5 A4 A3 A2 A1 A0

+5V

U1 74HCT688

+5V

3

CLK/TRG0 23

BCT0

R3 470k

JP3 CT0

1 3 5 7

ZC/TO0 7

CLK/TRG1 22 ZC/TO1 8

BCT1

CLK/TRG2 21 ZC/TO2 9

BCT2

JP4 CT1

1 3 5 7

2

BCT3

GND 1

A

B

2 4 6 8

JP6 CT3

1 3 5 7

5 GND

5V CT0 ZT0 CT1 ZT1 CT2 ZT2 CT3 CLKX GND

2 4 6 8

JP5 CT2

1 3 5 7

(ZC/TO3)

1 2 3 4 5 6 7 8 9 10

P3 CTCIO

2 4 6 8

CLK/TRG3 20

13 IEI 11 IEO

+5V

R4 470k

2 4 6 8

C

+5V CLK

5V 2 /RFSH PAGE CLK2 /BUSAK /HALT /BUSRQ

D

/WAIT /NMI D8 D9 D10 D11 D12 D13 D14 D15 TX2 RX2 USR4 USR5 USR6

3 4 5 6 7 8

1 3 5 7

CLK2

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

1 2 3 4 5 6 7

HISTORY v1.0 2018-06-05 First circuit boards v1.1 2018-06-22 R1,2,3,4 changed from 100k to 470k

X1 CLKX OE n.c. n.c. GND n.c. n.c. GND

VDD n.c. n.c. OUT n.c. n.c. OUT

14 13 12 11 10 9 8

+5V

JP7 CLK2

2 4 6 8

CLKX D

TITLE:

Z80 CTC module for RC2014 BCT2 1

BCT1

BCT0

Date:

2018-06-22

Sheet: 1/1 Drawn By: Stephen C Ccousins

EasyEDA V5.4.12 2

3

4

REV: 1.1

5

Z80 CTC module for RC2014 -

Jun 22, 2018 - /HALT. 7. /BUSRQ. 8. /WAIT 9. /NMI 10. D8 11. D9 12. D10 13. D11 14. D12 15. D13 16. D14 17. D15 18. TX2 19. RX2 20. USR4 21. USR5 22.

53KB Sizes 0 Downloads 200 Views

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