MC2340 ETC1 [List of Unclassifed Manufacturers], MC2340 Datasheet - Page 31

• Manufacturer Part Number: MC2340
• Description: Technical Specifications for Brushless Servo Motion Control
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

5.4
5.4.1
Pin description tables
I/O chip
Pin Name and
number
HostCmd
HostRdy
~HostRead
~HostWrite
~HostSlct
CPIntrpt
CPR/~W
CPStrobe
CPPeriphSlct
CPAddr0
CPAddr1
CPAddr15
MasterClkIn
81
8
92
100
94
77
53
54
52
41
43
50
89
Input
Output
Input
Input
Input
Output
Input
Input
Input
Input
Input
Direction
MC2300 Technical Specifications
Description
This signal is asserted high to write a host instruction to the Motion
Processor, or to read the status of the HostRdy and HostIntrpt signals. It is
asserted low to read or write a data word.
This signal is used to synchronize communication between the Motion
Processor and the host. HostRdy will go low (indicating host port busy) at
the end of a read or write operation according to the interface mode in
use, as follows:
Interface Mode HostRdy goes low
8/8
8/16
16/16
serial
HostRdy will go high, indicating that the host port is ready to transmit,
when the last transmission has been processed. All host port
communications must be made with HostRdy high (ready).
A typical busy-to-ready cycle is 12.5 microseconds.
When ~HostRead is low, a data word is read from the Motion Processor.
When ~HostWrite is low, a data word is written to the Motion Processor.
When ~HostSlct is low, the host port is selected for reading or writing
operations.
I/O chip to CP chip interrupt. This signal sends an interrupt to the CP
chip whenever a host–chipset transmission occurs. It should be
connected to CP chip pin 53, I/OIntrpt.
This signal is high when the I/O chip is reading data from the I/O chip,
and low when it is writing data. It should be connected to CP chip pin 4,
R/W.
This signal goes low when the data and address become valid during
Motion Processor communication with peripheral devices on the data
bus, such as external memory or a DAC. It should be connected to CP
chip pin 6, Strobe.
This signal goes low when a peripheral device on the data bus is being
addressed. It should be connected to CP chip pin 130, PeriphSlct.
These signals are high when the CP chip is communicating with the I/O
chip (as distinguished from any other device on the data bus). They
should be connected to CP chip pins 110 (Addr0), 111 (Addr1), and 128
(Addr15).
This is the master clock signal for the Motion Processor. It is driven at a
nominal 40 MHz
I/O Chip
31
after the instruction byte is transferred
after the second byte of each data word is transferred
after the second byte of the instruction word
after the second byte of each data word is transferred
after the 16-bit instruction word
after each 16-bit data word
n/a