h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 332

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 11 16-Bit Free-Running Timer (FRT)
11.5.9
When the OCRAMS bit in TOCR is set to 1, the contents of OCRAR and OCRAF are
automatically added to OCRA alternately, and when an OCRA compare-match occurs a write to
OCRA is performed. Figure 11.14 shows the OCRA write timing.
11.5.10 Mask Signal Generation Timing
When the ICRDMS bit in TOCR is set to 1 and the contents of OCRDM are other than H'0000, a
signal that masks the ICRD input capture signal is generated. The mask signal is set by the input
capture signal. The mask signal is cleared by the sum of the ICRD contents and twice the
OCRDM contents, and an FRC compare-match. Figure 11.15 shows the timing of setting the mask
signal. Figure 11.16 shows the timing of clearing the mask signal.
Rev. 3.00 Mar 21, 2006 page 278 of 788
REJ09B0300-0300
FRC
OCRA
OCRAR, OCRAF
Compare-match
signal
Input capture
signal
Input capture
mask signal
Automatic Addition Timing
Figure 11.15 Timing of Input Capture Mask Signal Setting
Figure 11.14 OCRA Automatic Addition Timing
N
N
A
N + A
N +1