mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 703

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

30.11 Digital to Analog Converter Block Diagram
The following figure shows the block diagram of the DAC module. It contains a 64-tap
resistor ladder network and a 64-to-1 multiplexer, which selects an output voltage from
one of 64 distinct levels that outputs from DACO. It is controlled through DAC Control
register (DACCR). Its supply reference source can be selected from two sources V
V
mode, DACO is connected to the analog ground.
30.12 DAC Functional Description
This section provides DAC functional description.
30.12.1 Voltage Reference Source Select
Freescale Semiconductor, Inc.
in2
• V
• V
. The module can be powered down (disabled) when it is not used. When in disable
64 tap resistor ladder
alternate voltage source is not available)
in1
in2
should be used to connect to the primary voltage source as supply reference of
should be used to connect to alternate voltage source (or primary source if
VRSEL
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Figure 30-24. 6-bit DAC Block Diagram
V
in1
MUX
V
Vin
in2
Preliminary
VOSEL[5:0]
DACO
Chapter 30 Comparator (CMP)
DACEN
in1
and
703