COP8SA-DM National Semiconductor, COP8SA-DM Datasheet - Page 196

• Manufacturer Part Number: COP8SA-DM
• Description: MODULE DEBUGGING FOR COP8SA
• Manufacturer: National Semiconductor

Specifications of COP8SA-DM

• Module/board Type: Debugger Module
• For Use With/related Products: Cop 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *COP8SA-DM

A large number of off-the-shelf devices are directly compatible with the MICROWIRE/
PLUS interface. This allows direct interface of the COP888 microcontrollers with a large
number of peripheral devices. The following sections provide examples of the
MICROWIRE/PLUS interface. These examples include a master/slave mode protocol,
code for a continuous mode of operation, code for a fast burst mode of operation, and a
COP888CL to an NMC93C06 interface.
4.2.1
This section gives an example of a MICROWIRE/PLUS master/slave protocol, the slave
mode operating procedure for the example protocol, and a timing illustration of the
example protocol.
Master/Slave Protocol:
4-4
BUSY
BUSY
CS
CS
SK
SK
COP8SAx7 APPLICATION IDEAS
1. CS from the master device is connected to G0 of the slave device. An active-
2. From the high-to-low transition on the CS line, there is no data transfer on
3. The master initiates data transfer on the MICROWIRE interface by turning
4. A series of data transfers takes place between the master and slave devices.
5. The master pulls the CS line high to end the MICROWIRE operation. The
MICROWIRE/PLUS Master/Slave Protocol
low level on the CS line causes the slave to interrupt.
the MICROWIRE interface until the setup time T has elapsed (see
Figure 4-3).
on the SK clock.
slave device returns to normal mode of operation.
T
T
Figure 4-3 MICROWIRE/PLUS Sample Protocol Timing
CLKS
CLKS
8
8
t
t
CLKS
CLKS
8
8
CLKS
CLKS
8
8
CLKS
CLKS
8
8
CLKS
CLKS
8
8
CLKS
CLKS
cop8_uwirep_proto
cop8_uwirep_proto
8
8