9
Control
XCD-V50CR
XCD-V50
Camera Command
Status Register
This camera complies with IIDC 1394-based Digital
Camera Specification, Version 1.31 (hereinafter
referred to as IIDC v1.31).
The standards document can be purchased from
1394TA (the 1394 Trade Association). Because it is
very helpful in understanding the explanations in this
Technical Manual, we recommend that you purchase a
copy of IIDC v1.31.
Memory Map
1394 devices have a 64-bit address space. The upper
10 bits show the bus ID (0~1023), and the next six bits
show the node ID (0~63). The IIDC standards require
the next 20 bits to be 1.
The remaining 28 bits can be allocated to the camera
as addresses, but in reality, the first 2 bits are fixed at
0, so the largest number of bits that can be allocated to
the camera as address space is 24 bits. The bus and
node IDs may be changed if the topology is re-
structured because of bus reset, so only the least
significant 32 address bits are shown in this User’s
Guide.
Address
Register
F0000000
Base address
F0000400
ConfigROM area
F0F00000
Base addresses for camera commands
F0F00000
CameraInitialize
F0F00100
Video Format Inq
F0F00180
Video Mode Inq
F0F00200
Frame Rate Inq
F0F00400
Basic Func Inq
F0F00500
Feature Element Inq
F0F00600
Isochronous Control register
F0F00800
FeatureControl
Control
---BusID---
--------(Must be 1)-------- ----(Address used by the camera)----
NodeID
bbbbbbbb | bbnnnnnn | 11111111 | 11111111 | 11110000 | 11110000 | 00000000 | 00000000
