Figure 11.2 Block Diagram Of 8-Bit Timer (Tmry And Tmrx) - Renesas H8S/2437 Hardware Manual

External clock Internal clock
TMCIY
TMCIX
Select clock
TMOY
TMRIY
IVG signal
Control logic
TMOX
TMRIX
[ ]
Legend
TCORAY: Time constant register AY
TCORBY: Time constant register BY
TCNTY: Timer counter Y
TCSRY: Timer control/status register Y
TCRY: Timer control register Y
TISR: Timer input select register

Figure 11.2 Block Diagram of 8-Bit Timer (TMRY and TMRX)

TMRY TMRX
φ φ
/4
φ φ
/256 /2
φ φ
/2048 /4
Clock X
Clock Y
TCORAY
Compare match AX
Compare match AY Comparator AY
Overflow X
TCNTY
Overflow Y
Clear Y
Compare match BX
Compare match BY Comparator BY
TCORBY
Input capture
Compare match C
TCORY
Interrupt signals
CMIAX
CMIBX
OVIX
CMIAY
CMIBY
OVIY
ICIX
TCORAX: Time constant register AX
TCORBX: Time constant register BX
TCNTX:
TCSRX:
TCRX:
TICR:
TCORC:
TICRR:
TICRF:
TCORAX
Comparator AX
TCNTX
Clear X
Comparator BX
TCORBX
TICRR
TICRF
TICR
Comparator C
TCORC
TCSRX
TCRY TCRX
TISR
Timer counter X
Timer control/status register X
Timer control register X
Input capture register
Time constant register
Input capture register R
Input capture register F
Rev. 1.00, 09/03, page 269 of 704