Artesyn MVME5100, Programmer'S Reference Manual, Page: 58 / 318

Product Data and Memory Maps
MVME5100 Single Board Computer Programmer’s Reference (6806800H17B )
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The Z8536 CIO is used to provide the modem control lines not provided by the Z85230 ESCC
and a method to inquire the module ID of the two sync/async serial ports that reside on the
MVME761 module. Refer to the Z8536 Data Sheet for programming information.
1.6.3.1 Z8536/Z85230 Registers
Accesses to the Z8536 CIO and the Z85230 ESCC are accomplished via Port Control and Port
Data Registers. The PCLK to the Z8536 is 5 MHz. Also, a Pseudo IACK Register is also defined to
retrieve interrupt vectors from these devices. The Z8536 CIO has higher priority than the
Z85230 ESCC in the interrupt daisy chain. The following list the registers associated with
accessing these two devices:
1.6.3.2 Z8536 CIO Port Pins
The assignment for the Port pins of the Z8536 CIO is as follows:
Table 1-22 Z8536/Z85230 Access Registers
PCI I/O Address Function
0000 0840 Z85230: Port B (Serial Port 4) Control
0000 0841 Z85230: Port B (Serial Port 4) Data
0000 0842 Z85230: Port A (Serial Port 3) Control
0000 0843 Z85230: Port A (Serial Port 3) Data
0000 0844 Z8536 CIO: Port C’s Data Register
0000 0845 Z8536 CIO: Port B’s Data Register
0000 0846 Z8536 CIO: Port A’s Data Register
0000 0847 Z8536 CIO: Control Register
0000 084F Z85230/Z8536 Pseudo IACK
Table 1-23 Z8536 CIO Port Pins Assignment
Port
Pin
Signal Name Direction Descriptions
PA0 TM3_MID0 Input Port 3 Test Mode when IDREQ_ = 1;
Module ID Bit 0 when IDREQ_ = 0.