HD64F3687HV Datasheet, PDF (195/538 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

12.2 Input/Output Pins
Table 12.1 shows the timer V pin configuration.
Table 12.1 Pin Configuration
Name
Timer V output
Timer V clock input
Timer V reset input
Trigger input
Abbreviation I/O
TMOV
Output
TMCIV
Input
TMRIV
Input
TRGV
Input
Section 12 Timer V
Function
Timer V waveform output
Clock input to TCNTV
External input to reset TCNTV
Trigger input to initiate counting
12.3 Register Descriptions
Time V has the following registers.
• Timer counter V (TCNTV)
• Timer constant register A (TCORA)
• Timer constant register B (TCORB)
• Timer control register V0 (TCRV0)
• Timer control/status register V (TCSRV)
• Timer control register V1 (TCRV1)
12.3.1 Timer Counter V (TCNTV)
TCNTV is an 8-bit up-counter. The clock source is selected by bits CKS2 to CKS0 in timer
control register V0 (TCRV0). The TCNTV value can be read and written by the CPU at any time.
TCNTV can be cleared by an external reset input signal, or by compare match A or B. The
clearing signal is selected by bits CCLR1 and CCLR0 in TCRV0.
When TCNTV overflows, OVF is set to 1 in timer control/status register V (TCSRV).
TCNTV is initialized to H'00.
12.3.2 Time Constant Registers A and B (TCORA, TCORB)
TCORA and TCORB have the same function.
TCORA and TCORB are 8-bit read/write registers.
Rev.5.00 Nov. 02, 2005 Page 161 of 500
REJ09B0027-0500