HD64F3670 RENESAS [Renesas Technology Corp], HD64F3670 Datasheet - Page 163

• Manufacturer Part Number: HD64F3670
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 11.8 shows an example of buffer operation when the GRA is set as an input-capture
register and GRC is set as the buffer register for GRA. TCNT operates as a free-running counter,
and FTIOA captures both rising and falling edge of the input signal. Due to the buffer operation,
the GRA value is transferred to GRC by input-capture A and the TCNT value is stored in GRA.
H'FFFF
H'F000
H'AA55
H'55AA
H'1000
H'0000
FTIOA
GRA
FTIOB
GRB
TCNT value
H'FFFF
H'DA91
H'5480
H'0245
H'0000
FTIOA
GRA
GRC
Figure 11.8 Buffer Operation Example (Input Capture)
TCNT value
Figure 11.7 Input Capture Operating Example
H'1000
H'0245
H'AA55
H'5480
H'0245
H'F000
H'DA91
H'5480
Rev. 2.0, 03/02, page 139 of 298
H'55AA
Time
Time