H8SSLASH2214 datasheet(862/936 Pages) RENESAS

Il numero della parte	H8S/2214

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	936 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Appendix B Internal I/O Register

Rev.4.00 Sep. 18, 2008 Page 802 of 872

REJ09B0189-0400

TCNT0—Timer Counter

H'FF74(W)

H'FF75(R)

WDT0

R/W

Bit

Initial value

Read/Write

RSTCSR—Reset Control/Status Register

H'FF76(W)

H'FF77(R)

WDT0

WOVF

R/(W)*

RSTE

R/W

RSTS

R/W

—

Bit

Initial value

R/W

Note: * Only 0 can be written, to clear the flag.

RSTCSR is write-protected by a password to prevent accidental overwriting.

For details see section 11.2.4, Notes on Register Access.

Reset Select

Power-on reset

Manual reset

Reset Enable

Note: * The chip is not reset internally, but TCNT and

TCSR in WDT0 are reset.

No internal reset when TCNT overflows*

Internal reset is generated when TCNT overflows

Watchdog Overflow Flag

[Clearing condition]

• Cleared by reading RSTCSR when WOVF = 1, then writing 0 to WOVF

[Setting condition]

• When TCNT overflows (from H'FF to H'00) in watchdog timer mode

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