PXD20RM Datasheet, PDF (1534/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

.To make it easier to understand, Table 46-22 shows an simpler example where the number of active lines
is 6.
VLEN
Frame
0
0
1
1
0
1
2
0
1
1
0
1
2
3
Table 46-22. ctgl[3] signal example A
Active Line Number
0
1
2
3
4
5
6
7
8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
v_ref pulse
length
7
7
6
6
9
9
7
7
7
7
46.4.2.4 Signal Mixer (SMX)
To generate more complicated timing signals, there are 14 Signal Mixer/Synthesizer (SMX) modules in
the TCON which can be used to perform logic operations between every two signals. Each SMX module
takes 2 signal inputs (X and Y), and generates 1 SMXx output.
The X and Y input of each SMX module can be selected from any two of the 28 signals (4 comparator
outputs, 6 pulses, 4 toggle generator outputs, constant 0 or 1, and 12 feedback signals SMX0~11). The X/Y
signal selection is configurabled via TCON_SMXx.X_SEL and TCON_SMXx.Y_SEL (see
Section 46.3.3.7, TCON_SMX0 - TCON_SMX13). 12 of the SMXx output (SMX0~11) can be feedback
to the SMXx input again in order to generate even more complicated signals (combining information of
more than 2 signals),
The SMX module is composed of several logic operation units (AND, OR, XOR or NAND), and a
look-up-table (LUT).
The LUT takes 4 inputs, including the current LUT output value and a 4-bit index (index[3:0]), the LUT
output is the next cycle SMX output. Function performed by the LUT is determined by the values
programmed into TCON_LUTx (see Section 46.3.3.10, TCON_LUT0 - TCON_LUT13). By default the
value of TCON_LUTx is 32’hffff_005c and the default truth table of the LUT is shown in Table 46-23
where SMXx(n-1) is the current SMXx state and SMXx(n) is the next cycle SMXx value. With this setting
the LUT emulates the function of a Set/Reset/Toggle/Data flip-flop, where index3 to index0 are the
Set/Reset/Toggle enable/Data inputs, “Set” has the highest priority. The user can also reprogram the
46-26
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor