HD64F2145 Datasheet, PDF (282/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Figure 11.1 shows a block diagram of the FRT.
External clock
FTCI
Internal clock
ø/2
ø/8
ø/32
Clock selector
Clock
OCRAR/F (H/L)
OCRA (H/L)
FTOA
FTOB
FTIA
FTIB
FTIC
FTID
Compare-match A
Overflow
Clear
Control logic ^{Compare-match B}
Comparator A
FRC (H/L)
Comparator B
Input capture
OCRB (H/L)
ICRA (H/L)
ICRB (H/L)
ICRC (H/L)
ICRD (H/L)
Comparator M
×1
Compare-match M
×2
OCRDM L
Internal data bus
TCSR
TIER
TCR
TOCR
ICIA
ICIB
ICIC
ICID
OCIA
OCIB
FOVI
Interrupt signal
Legend
OCRA, OCRB : Output compare register A, B (16-bit)
OCRAR,OCRAF : Output compare register AR, AF (16-bit)
OCRDM
: Output compare register DM (16-bit)
FRC
: Free-running counter (16-bit)
ICRA to D
: Input capture registers A to D (16-bit)
TCSR
: Timer control/status register (8-bit)
TIER
: Timer interrupt enable register (8-bit)
TCR
: Timer control register (8-bit)
TOCR
: Timer output compare control register (8-bit)
Figure 11.1 Block Diagram of 16-Bit Free-Running Timer
Rev. 2.0, 08/02, page 242 of 788