Enabling Vic Port; Vic Port Registers; Vic Control Register (Vicctl; Vic Input Register (Vicin - Texas Instruments TMS320DM648 User Manual

Enabling VIC Port

6.4 Enabling VIC Port
Perform the following steps to enable the VIC port.
1. Clear the GO bit in the VIC control register (VICCTL) to 0.
2. Set the PRECISION bits in VICCTL to the desired precision.
3. Set the VIC clock divider register (VICDIV) bits to appropriate value based on the precision and
interpolation frequency.
4. Set the GO bit in VICCTL to 1.
5. The VIC input register (VICIN) is written into every time a new input code is available for interpolation.
Repeat step Step 1
6.5

VIC Port Registers

The VIC port registers are listed in
of these registers.
Offset
Address
00h
04h
08h
(1)
The absolute address of the registers is device specific and is equal to the base address + offset
address. See the device-specific datasheet to verify the register addresses.
170 VCXO Interpolated Control Port
as often as needed.
Table 6-3. See the device-specific datasheet for the memory address
Table 6-3. VIC Port Registers
(1)
Acronym Register Name
VICCTL VIC Control Register
VICIN VIC Input Register
VICDIV VIC Clock Divider Register
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Section
Section 6.5.1
Section 6.5.2
Section 6.5.3
SPRUEM1 – May 2007
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