Usage Notes; Conflict Between Tdpcnt Write And Count-Up Operation; Conflict Between Tdppdmx Write And Compare Match - Renesas H8S/2100 Series Hardware Manual

12.6

Usage Notes

12.6.1

Conflict between TDPCNT Write and Count-Up Operation

If a conflict between a TDPCNT write and counting up operation occurs in the second half of the
TDPCNT write cycle, writing to TDPCNT takes precedence and TDPCNT is not incremented.
Figure 12.13 shows the timing of this conflict.
φ
Internal write
signal
Internal clock
TDPCNT
input clock
TDPCNT
Figure 12.13 Conflict between TDPCNT Write and Counting Up
12.6.2

Conflict between TDPPDMX Write and Compare Match

If a conflict between a TDPPDMX write and a compare match occurs in the second half of the
TDPPDMX write cycle, writing to TDPPDMX takes precedence and the compare match signal is
inhibited. Figure 12.14 shows the timing of this conflict.
φ
Internal write
signal
TDPCNT
TDPPDMX
Compare
match signal
Figure 12.14 Conflict between TDPPDMX Write and Compare Match
T1
Write data M
N - 1
T1
N
N
Section 12 16-Bit Duty Period Measurement Timer (TDP)
T2
T2
N + 1
Inhibited
Rev. 1.00 Apr. 28, 2008 Page 351 of 994
M M + 1
N+ 2
M
REJ09B0452-0100