H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 537

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Contention between TCNT Write and Overflow/Underflow
If there is an up-count or down-count in the T2 state of a TCNT write cycle, and
overflow/underflow occurs, the TCNT write takes 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 H8S/2350 Group, 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.
Address
Write signal
TCNT
TCFV flag
Figure 10.57 Contention between TCNT Write and Overflow
H'FFFF
TCNT write cycle
T1
TCNT address
T2
Section 10 16-Bit Timer Pulse Unit (TPU)
Rev. 3.00 Sep 15, 2006 page 503 of 988
M
TCNT write data
REJ09B0330-0300