PXS20RM Datasheet, PDF (1298/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Sine Wave Generator (SWG)
Address: Base + 0x0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
NRO
1
W
IOAMPL
00
0 0000
PDS
Reset ₀
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
IOFREQ
W
Reset ₀
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NOTES:
1 _{For cut1, this field must be set to 1 by software before using the SWG. This field is reserved for cut2/3.}
Figure 44-2. SWG control register (SWG_CTRL)
Table 44-2. SWG_CTRL field descriptions
Field
Description
LDOS
Load sine wave frequency
0 Wait for I/O sine wave frequency
1 Load I/O sine wave frequency
Note: The I/O frequency is loaded by waiting until LDOS = 0 and then setting LDOS = 1.
NRO
Noise reduction enable
0 Noise reduction feature is enabled (signal-to-noise ratio improved)
1 Noise reduction feature is disabled (signal-to-noise ratio not improved)
IOAMPL Output sine wave amplitude (see Table 44-3)
SEMASK SWG error interrupt mask
0 Mask the SWG error interrupt source
1 Enable the SWG error interrupt source
S0H1
Stop mode behavior
0 In STOP mode, the SWG enters Power Down mode only if PDS = 1.
1 In STOP mode, the SWG always enters Power Down mode.
PDS
Enter/exit Power Down mode
0 Force the SWG to exit Power Down mode
1 Force the SWG to enter Power Down mode
IOFREQ Output sine wave frequency (see Section 44.4.2, Output sine wave frequency)
44-2
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor