Specifications

HW400p/M Technical Reference - 1.0, March 6, 2002 CPLD Registers 49
General Purpose Register (GPR) The General Purpose Register (GPR) is a read/write register. Bits 0 and 1 are
not used.
Table 5-16 shows the functions assigned to the GPR bits.
The GPR bits and states are defined as:
Table 5-16 General Purpose Register—FFE2000E
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
NVLCK NVSIZ2 NVSIZ1 NVSIZ0 NVDEV MPC_TYPE RSVD RSVD
NVLCK = 0 High-density Flash lock-down mechanism is
disabled (default state)
= 1 High-density Flash lock-down mechanism is
enabled
NVSIZ[2:0] = 000 Each high-density Flash device size is 0 Mbytes
= 001 Each high-density Flash device size is 2 Mbytes
= 010 Each high-density Flash device size is 4 Mbytes
= 011 Each high-density Flash device size is 8 Mbytes
other values are reserved for future device sizes
Note:
NVSIZ denotes size of each device, not the total size of
the Flash.
NVDEV = 0 One high-density Flash device is installed
= 1 Two high-density Flash devices are installed
MPC_TYP = 0 8245 (hard-wired)