Monaco Technical Reference
Spectrum Signal Processing
Registers
46
Part Number 500-00191
Revision 2.00
VPAGE Register
Address: 016D 0000h
D31..
..D24
Reserved
D23..
..D20
D19
D18
D17
D16
Reserved
KADDR31
KADDR30
KADDR29
KADDR28
D15
D14
D13
D12
D11
D10
D9
D8
KADDR27
KADDR26
KADDR25
KADDR24
KADDR23
KADDR22
KADDR21
KADDR20
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
KFC2
KFC1
KFC0
KSIZE1
KSIZE0
KADDR1
KADDR0
This register sets certain SCV64 address and control lines in order to extend the address
range of the ‘C6x processors and set up the type of VME cycle to be performed. Each
node has its own register. Except for D7 all other reserved bits are disconnected; D7 will
store what is written to it. These register is undefined upon reset and should be
initialized. Refer to the SCV64 User Manual for complete information on these signals.
KADDR[31..20]
Sets the upper 12 address bits that are latched to the SCV64 when the
‘C6x accesses the VME address space. This extends the 20 address bits
of the ‘C6x to the full 32 bits of the VME address space. This allows a
‘C6x access the entire VME bus as a master by setting these bits to
1 Mbyte region being accessed. A write to this register latches data lines
D19..8 and presents them to the SCV64 upper address lines
KADDR31..20 respectively. For example, a write to the VPAGE register
with data equal to 8 0000h causes the next outbound VME cycle (base
address 0170 0000h) with offset 0x0 to be addressed at VME address
8000 0000h.
KFC[2..0]
Sets the access type as User or Supervisor Program, or Data accesses.
Directly affects the address modifiers used for the VME Master cycle.
KSIZE[1..0]
Sets the number of bytes transferred for VME Master cycles. Directly
affects D32, D16, or D8 access type.
KADDR[1..0]
These bits allow the node, which is little endian in order to access the
PEM and PMCs, to access the SCV64, which is big endian.
Note:
Although access to VPAGE is local to each processor node, any read or
write to the register requires that the Global Shared Bus to be acquired. The
DSP’s cycles are extended until any current Global Shared Bus operations are
complete when accessing the VPAGE Register.