H8S2153 Datasheet, PDF (270/750 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family / H8S/2100 Series

Section 11 8-Bit Timer (TMR)
11.6.5 Mode Setting with Cascaded Connection
If the 16-bit count mode and compare-match count mode are set simultaneously, the input clock
pulses for TCNT_0 and TCNT_1 are not generated, and thus the counters will stop operating.
Simultaneous setting of these two modes should therefore be avoided.
Rev. 2.00 Sep.11, 2008 Page 234 of 710
REJ09B0384-0200