Abov MC97F6108A - Figure 54. PPG Period Block Diagram When Period MinMax Matching; Figure 55. When Max Period Matching

11. PPG (Programmable Pulse Generator) MC97F6108A User’s manual
112
{PPGH, PPGL}
(16-bit Counter)
ATPRL
(8-bit)
0 1
MUX
- DSTEP[7:0]
00 01 10 11
MUX
CPOUT2
(in the previous period)
current period
increase
decrease
ATPSEL[1:0]
ATPEN
0 1
MUX
PPGPL
(8-bit)
PPG start
read only
PPG period register
PERIOD write
M 0
U
X 1
M 0
U
X 1
ATPMAXHR
(8-bit)
ATP_MAX
ATPEN
~(PERIOD write)
MAX match
MIN match
current period
current period
ATPEN
PPGPH
(8-bit)
ATPMAXHR
(8-bit)
ATPMINHR
(8-bit)
ATPMINHR
(8-bit)
ATPRH
(8-bit)
period matching
CMP2
C2DBSEL[1:0
]
by pass
0.3 us
0.6 us
1.2 us
+ USTEP[7:0]
ATP_MIN
Figure 54. PPG Period Block Diagram When Period Min/Max Matching
PPGO
ATPHR, ATPLR
start pulse
1
CPOUT2
5
PPGPH/PPGPL
1
C
PERIOD=1 PERIOD=5
PERIO D=9
PERIO D=D PERIOD=D PERIOD=D PERIOD=C
9 D
4
USTEP
ATPMAXHR/ATPMAXLR
D
ATP_MAX
ATPSEL
ATPEN
1x (increase)
1
DSTEP
write 0
Figure 55. When Max Period Matching