SBE HighWire HW400c/2 Specifikace stáhnout pdf (Strana 49)

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)

1 2 ... 44 45 46 47 48 49 50

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SBE HighWire HW400c/2 Specifikace Strana 49