HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 558

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Contention between TCNT Write and Overflow/Underflow: If there is an up-count or down-
count in the T
precedence and the TCFV/TCFU flag in TSR is not set.
Figure 10.57 shows the operation timing when there is contention between TCNT write and
overflow.
Multiplexing of I/O Pins: In the chip, the TCLKA input pin is multiplexed with the TIOCC0 I/O
pin, the TCLKB input pin with the TIOCD0 I/O pin, the TCLKC input pin with the TIOCB1 I/O
pin, and the TCLKD input pin with the TIOCB2 I/O pin. When an external clock is input,
compare match output should not be performed from a multiplexed pin.
Interrupts and Module Stop Mode: If module stop mode is entered when an interrupt has been
requested, it will not be possible to clear the CPU interrupt source or the DMAC or DTC
activation source. Interrupts should therefore be disabled before entering module stop mode.
Rev.4.00 Sep. 07, 2007 Page 528 of 1210
REJ09B0245-0400
φ
Address
Write signal
TCNT
TCFV flag
2
state of a TCNT write cycle, and overflow/underflow occurs, the TCNT write takes
Figure 10.57 Contention between TCNT Write and Overflow
H'FFFF
Prohibited
TCNT write cycle
T
TCNT address
1
T
2
M
TCNT write data