qf4a512 ETC-unknow, qf4a512 Datasheet - Page 34

• Manufacturer Part Number: qf4a512
• Description: 4-channel Programmable Signal Converter Psc
• Manufacturer: ETC-unknow

12. CONTROL REGISTERS
12.1 Overview
Table 16. Control Register Map
Note: Numbers in parentheses are the number of bytes allocated to each function.
The Control Registers are located in the first 256 bytes of address space as shown in the table. The QF4A512 can be configured to
automatically load these registers from EEPROM, with the exception of the first 7 bytes, at power up or after a reset.
It is strongly recommended that the configuration and filter coefficient data is set up using the Quickfilter Pro software. For applications
requiring reconfiguration on the fly it is suggested that complete configuration files, generated by the software, are stored in external
memory and loaded in full to the device. However, it may often be necessary to write individual commands to the device, for example to
switch between run and configure mode, or to turn on/off specific channels. To accomplish this, more detailed descriptions of register
functions can be found in the following paragraphs.
Several registers are designated as “Reserved”. The user may write to these registers without any effect on chip operation, i.e. it is
possible to write to the entire register map as a single contiguous block. However, when they are read these registers will not
necessarily reflecting the value written to them during the write operation.
The corresponding EEPROM locations can also be written, and these values can also be read back. Since these locations may be used
for future functionality they should not be used for user data (the user area is available for this purpose).
Other registers are denoted for Factory Use Only. These registers should be written with the default values shown to ensure correct
device operation.
Rev C5, Jan 07
00C0
001D
0090
0060
0051
0032
0030
0011
0009
0005
0000
Global Maintenance (19)
Global Configuration (12)
Run & Status (8)
EEPROM Startup (4)
High Level (5)
Channel
Channel
Channel
Channel
4
3
2
1
Maintenance (9)
Configuration (31)
Run & Status (2)
Maintenance (9)
Configuration (31)
Run & Status (2)
Maintenance (9)
Configuration (31)
Run & Status (2)
Maintenance (9)
Configuration (31)
Run & Status (2)
PRELIMINARY
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QF4A512