A HARDWARE REFERENCE
3-13
3.9.3 CIO Port B
Port B is an 8-bit I/O port used to clock, read and write the serial EEPROMs located on the Cyclone EP
and the Squall II Module. Configure the port as open collector bidirectional pins. Figure 3-4 shows the
pin assignments. Section 5.3, Squall II Module Serial EEPROM (pg. 5-3) discusses the serial
EEPROMs and reserved data fields. Cyclone Microsystems has written code to read and write the serial
EEPROMs, which is included in the initialization portion of the MON960.
Figure 3-4. CIO Port B
1. Reserved for future processors
Table 3-16. CIO Port A Bits 2-0
Module Type CPU Module Type Signals
80960Sx 000
80960Kx 001
80960Cx 010
80960Hx 011
80960Jx 100
Reserved
1
101
Reserved
1
110
Reserved
1
111
NOTE:
4 2 0
Squall Module SDA
Reserved
(Initialize to 0)
5 3 167
CIO Port B
Squall Module SDK
Cyclone EP SDA
Cyclone EP SDK