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CPLD: Miscellaneous Registers
10007175-02 KAT4000 User’s Manual
7-7
RIO7-0: 1 Logic “1" on the net
0 Logic “0" on the net
RTM GPIO Control Register (RGCR)
The RTM GPIO Control register controls GPIO between the carrier card and the Rear Transi-
tion Module (RTM). The GPIO pin buffers are open collector. Set (1) the bit if the RTM will
drive the GPIO line to avoid contention. Default register values are shown in the bottom
row of the register table.
Register 7-9: RTM GPIO Control Register (RGCR) at 0xfc40,003c
RGC7-0: 1 Tristates the driver on the GPIO line, externally pulled high
0 Drives logic “0" onto the GPIO line
MISC Control Register (MISC)
The MISC Control register controls miscellaneous functions of the board (PCIe, SIO, I
2
C,
Test Clock). Default register values are shown in the bottom row of the register table.
Register 7-10: MISC Control Register (MISC) at 0xfc40,0034
PCIE: PCIe Root Complex
1 Root complex for PCIe system
0 Not the root complex for PCIe system
SRWP1: Serial ROM 1 Write Protect
1Write protected
0 Not write protected
SRWP0: Serial ROM 0 Write Protect
1Write protected
0 Not write protected
76543210
RGC7 RGC6 RGC5 RGC4 RGC3 RGC2 RGC1 RGC0
11111111
7
65
43
2
10
PCIE
SRWP1 SRWP0
FWP1 FWP0
NFWP
SDA SCL
11100111