HD6413007F20 Datasheet, PDF (406/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

10. 8-Bit Timers
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count.
Note:
When TCORB1 in channel 1 is used for input capture, TCORB0 in channel 0 cannot be
used as a compare match register.
Similarly, when TCORB3 in channel 3 is used for input capture, TCORB2 in channel 2
cannot be used as a compare match register.
Setting Input Capture Operation in 16-Bit Count Mode
• Channels 0 and 1:
⎯ In 16-bit count mode, TCORB0 and TCORB1 function as a 16-bit input capture register
when the ICE bit is set to 1 in 8TCSR1.
⎯ Select rising edge, falling edge, or both edges as the input edge(s) for the input capture
signal (TMIO₁) with bits OIS3 and OIS2 in 8TCSR0. (In 16-bit count mode, the settings of
bits OIS3 and OIS2 in 8TCSR1 are ignored.)
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR1, and start the 8TCNT count.
• Channels 2 and 3:
⎯ In 16-bit count mode, TCORB2 and TCORB3 function as a 16-bit input capture register
when the ICE bit is set to 1 in 8TCSR3.
⎯ Select rising edge, falling edge, or both edges as the input edge(s) for the input capture
signal (TMIO₃) with bits OIS3 and OIS2 in 8TCSR2. (In 16-bit count mode, the settings of
bits OIS3 and OIS2 in 8TCSR3 are ignored.)
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count.
10.5 Interrupt
10.5.1 Interrupt Source
The 8-bit timer unit can generate three types of interrupt: compare match A and B (CMIA and
CMIB) and overflow (OVI). Table 10.5 shows the interrupt sources and their priority order. Each
interrupt source is enabled or disabled by the corresponding interrupt enable bit in 8TCR. A
separate interrupt request signal is sent to the interrupt controller by each interrupt source.
Table 10.5 Types of 8-Bit Timer Interrupt Sources and Priority Order
Interrupt Source
CMIA
CMIB
TOVI
Description
Interrupt by CMFA
Interrupt by CMFB
Interrupt by OVF
Priority
High
Low
Rev.5.00 Sep. 12, 2007 Page 376 of 764
REJ09B0396-0500