Input/Output Pins; Register Descriptions; Timer Counter V (Tcntv); Table 11.1 Pin Configuration - Renesas H8 Series Hardware Manual

11.2

Input/Output Pins

Table 11.1 shows the timer V pin configuration.

Table 11.1 Pin Configuration

Name
Timer V output
Timer V clock input
Timer V reset input
Trigger input
11.3

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)
11.3.1 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.
Abbreviation I/O
TMOV Output
TMCIV Input
TMRIV Input
TRGV Input
Section 11 Timer V
Function
Timer V waveform output
Clock input to TCNTV
External input to reset TCNTV
Trigger input to initiate counting
Rev. 3.00 Sep. 14, 2006 Page 147 of 408
REJ09B0105-0300