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Chapter 1 MKY46 Role and Features
Chapter 1 MKY46 Role and Features
This chapter describes the role and features of the MKY46 in the CUnet.
The MKY46 is a CUnet-dedicated I/O-IC with the CUnet protocol based on full hard-wire logic packaged in
a 100-pin TQFP using CMOS technology.
The MKY46 is a CUnet-dedicated I/O-IC (CUnet I/O-IC) providing backward compatibility with the IO
mode of previously released MKY40. This manual describes a “CUnet station” which mounts the MKY46
in the CUnet system as “I/O station”.
1.1 Station in MKY46 (I/O Station)
The MKY46 can connect its general-purpose external I/O pin signals (I/O
signals) directly to Global Memory (GM) of the CUnet system by connecting a network I/F to a network (Fig. 1.1).
The CUnet system in Figure 1.2 consists of two MEM stations and two I/O
stations. Each MEM station has a MKY40 (MEM mode) that can access
GM and the user CPU. Each I/O station has a MKY46 (CUnet I/O-IC). In
the CUnet system, all user CPUs can read the state of input ports of the I/O
stations from GM. User CPUs can also set the state of output ports of the I/
O stations.
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