CY325 ETC, CY325 Datasheet - Page 15

• Manufacturer Part Number: CY325
• Description: Stepper System Controller
• Manufacturer: ETC

DIP
32
33
34
35
36
37
38
39
DIP
40
© 2002 Cybernetic Micro Systems
PLCC
36
37
38
39
40
41
42
43
PLCC
44
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I)
Pin Name
D7
D6
D5
D4
D3
D2
D1
D0
This group is the parallel data bus, used to read or write parallel data.
During access to external thumbwheel switches, memory, or display, the
lower byte of the device address is presented on these lines just prior to
the data transfer. Parallel commands are also accepted by the CY545 on
these lines, using the handshake control signals. These lines are open
drain, so external pull-up resistors are required when they are used as
outputs.
Pin Name
VCC
Description
Parallel data bus, bit 7, MSB
Parallel data bus, bit 6
Parallel data bus, bit 5
Parallel data bus, bit 4
Parallel data bus, bit 3
Parallel data bus, bit 2
Parallel data bus, bit 1
Parallel data bus, bit 0, LSB
Description
+5 Volt power supply input.
10
Chapter 2 - Pinout & Package Overview
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