Block Diagram - Hitachi H8/3006 Hardware Manual

10.1.2

Block Diagram

The 8-bit timers are divided into two groups of two channels each: group 0 comprising channels 0
and 1, and group 1 comprising channels 2 and 3. Figure 10.1 shows a block diagram of 8-bit timer
group 0.
External clock
sources
TCLKA
TCLKC
TMO
0
TMIO
1
Legend
TCORA : Timer constant register A
TCORB : Timer constant register B
8TCNT : Timer counter
8TCSR : Timer control/status register
8TCR
Figure 10.1 Block Diagram of 8-Bit Timer Unit (Two Channels: Group 0)
Internal clock
sources
φ/8
φ/64
φ/8192
Clock 1
Clock 0
Clock select
Compare match A1
Compare match A0
Overflow 1
Overflow 0
Compare match B1
Control logic
Compare match B0
Input capture B1
CMIA0
CMIB0
CMIA1/CMIB1
OVI0/OVI1
Interrupt signals
: Timer control register
TCORA0 TCORA1
Comparator A0 Comparator A1
8TCNT0 8TCNT1
Comparator B0 Comparator B1
TCORB0 TCORB1
8TCSR0 8TCSR1
TCR0 TCR1
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