HINTON INSTRUMENTS: Z80-DIO

Pin #	Name	I/O	Description
Bus Interface
52	A7	Input active low	Address Bus bit 7 or CE1-
53	A6	Input active high	Address Bus bit 6 or CE2+
57	A3	Input	Address Bus bit 3. Register selection
58	A2	Input	Address Bus bit 2. Register selection
59	A1	Input	Address Bus bit 1. Register selection
60	A0	Input	Address Bus bit 0. Register selection
41	D7	Bidirectional	Data Bus 7
42	D6	Bidirectional	Data Bus 6
43	D5	Bidirectional	Data Bus 5
44	D4	Bidirectional	Data Bus 4
45	D3	Bidirectional	Data Bus 3
46	D2	Bidirectional	Data Bus 2
47	D1	Bidirectional	Data Bus 1
48	D0	Bidirectional	Data Bus 0
37	IORQ or CE3-	Input active low	Z80 IORQ or Chip Enable
31	M1	Input active low	Z80 M1 or connect to Logic High
35	ST	Input	Z180 bus signal
40	RD	Input active low	Read Enable
39	WR	Input active low	Write Enable
34	RESET	Input active low	Master Reset
33	CLK	Input	System Clock. 20MHz max.
23	A19	Input	Address Bus bit 19. Memory Map Decoder
22	A18	Input	Address Bus bit 18. Memory Map Decoder
36	MREQ	Input active low	MREQ. Memory Map Decoder
17	INT2	Output Open collector	Interrupt. Connect to Z180 Int2 pin
Port Interfaces
Pin #	Name	I/O	Description
61	PC7	Bidirectional	Port C Bit 7
62	PC6	Bidirectional	Port C Bit 6
63	PC5	Bidirectional	Port C Bit 5
64	PC4	Bidirectional	Port C Bit 4
65	PC3	Bidirectional	Port C Bit 3 / Shaft Encoder 2 Input B
67	PC2	Bidirectional	Port C Bit 2 / Shaft Encoder 2 Input A
68	PC1	Bidirectional	Port C Bit 1 / Shaft Encoder 1 Input B
1	PC0	Bidirectional	Port C Bit 0 / Shaft Encoder 1 Input A
2	LCD D7	Bidirectional	LCD 4 bit Data Bus bit 7/3
3	LCD D6	Bidirectional	LCD 4 bit Data Bus bit 6/2
5	LCD D5	Bidirectional	LCD 4 bit Data Bus bit 5/1
6	LCD D4	Bidirectional	LCD 4 bit Data Bus bit 4/0
7	LCD E	Output	LCD Enable
8	LCD RW	Output	LCD Read/Write
9	LCD RS	Output	LCD Register Select
18	Sw Din	Input	Switch Data Input
17	Sw Stb	Output active high	Switch Strobe (Parallel Load)
16	Sw Clk	Output	Switch Clock
13	ADC CS	Output	ADC Chip Select
12	ADC IO Clk	Output	ADC I/O Clock
11	ADC Add	Output	ADC Address
10	ADC Din	Input	ADC Data Input
Glue
Pin #	Name	I/O	Description
30	Z80M1	Output	Z80 M1 for Z80 bus
29	500kHz	Output	CLK ÷20 (for MIDI UARTs)
28	DIV2	Output	CLK ÷10 (for ADC System Clock)
19	DIV2	Output	Programmable Divider Output (Square Wave)
20	CS	Output active low	Chip Select for second I/O mapped peripheral
24	RAM	Output active low	RAM Chip Select for Memory Mapped SRAM
26	ROM	Output active low	ROM Chip Select for Memory Mapped EPROM
56	FLASH	Output active low	FLASH Chip Select for Memory Mapped FLASH Device
50	EXTAL	Input	Oscillator or External Clock input
51	XTAL	Output	Oscillator Drive for external Crystal (20MHz max)
Utility
Pin #	Name	I/O	Description
54	MODE	Input	Connect to Gnd
4, 21, 25, 38, 55	Vcc	Power	+5V supply
14, 15, 32, 49, 68	Gnd	Power	0V supply

Notes