h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 343

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

11.3.3
FRC can be cleared when compare-match A occurs. Figure 11.6 shows the timing of this
operation.
11.3.4
Input Capture Input Timing: An internal input capture signal is generated from the rising or
falling edge of the signal at the input capture pin, as selected by the corresponding IEDGx (x = A
to D) bit in TCR. Figure 11.7 shows the usual input capture timing when the rising edge is
selected (IEDGx = 1).
If the upper byte of ICRA to ICRD is being read when the corresponding input capture signal
arrives, the internal input capture signal is delayed by one system clock ( ) period. Figure 11.8
shows the timing for this case.
Compare-match A
signal
FRC
Input capture
input pin
Input capture
signal
FRC Clear Timing
Input Capture Input Timing
Figure 11.7 Input Capture Signal Timing (Usual Case)
Figure 11.6 Clearing of FRC by Compare-Match A
N
Rev. 4.00 Jun 06, 2006 page 289 of 1004
Section 11 16-Bit Free-Running Timer
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REJ09B0301-0400