TPS-1 User’s Manual: Hardware
3. Host Interface
R19UH0081ED0107 Rev. 1.07
page 17 of 86
Jul 30, 2018
3. Host Interface
The host interface is designed to connect external microprocessors. These processors access the internal shared memory of the TPS-1 in order to
exchange cyclic or acyclic data with the PROFINET IO interface. The shared memory has an address space of 64 Kbyte. The data exchange is
processed with the help of an
“Event Unit”
.
Another way to inform the external host CPU about a new PROFINET status is the integrated interrupt system. The parallel interface can be switched
to Motorola or Intel mode.
It is only possible to use the Host parallel interface or the Host serial interface. It is not possible to use both at the same time.
3.1. Testing DPRAM Interface
For testing the DPRAM Interface it is useful to have addresses with defined values. After start of the TPS-1 firmware the TPS-1 writes the magic
number and the NRT Area Size into the addresses 0x8000 and 0x8004.
TPS-1
0x8000
0x8004
0x0000
0xFFFF
Magic Number
NRT Area Size
ARM CPU
Application CPU
The application CPU read
the Magic Number to
recognize the start up of
the TPS-1
Figure 3-1: TPS-1 with address page 16 Kbyte
3.2. Parallel Interface
3.2.1. Operating modes of the parallel interface
The parallel interface can be used with an 8-bit or 16-bit data bus.
Table 3-1: Operating Modes of the parallel interface
Setting
Description
Operating mode
Separate Read / Write signal (Intel Mode)
Read-/Write-Control (Motorola Mode)
Polarity of ready signal
Ready Signal “active low”
Ready Signal “active high”
Data bus width
8 bit
16 bit
The configuration of the parallel interface is also done with “TPS Configurator”.
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