HD64F2149YV datasheet(344/1075 Pages) RENESAS

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Section 11 16-Bit Free-Running Timer

Rev. 3.00 Jan 18, 2006 page 316 of 1044

REJ09B0280-0300

11.2.5

Output Compare Register DM (OCRDM)

Bit

Initial

R/W

value

Write

Read/

OCRDM is a 16-bit readable/writable register in which the upper 8 bits are fixed at H'00.

When the ICRDMS bit in TOCR is set to 1 and the contents of OCRDM are other than H'0000,

the operation of ICRD is changed to include the use of OCRDM. The point at which input capture

D occurs is taken as the start of a mask interval. Next, twice the contents of OCRDM is added to

the contents of ICRD, and the result is compared with the FRC value. The point at which the

values match is taken as the end of the mask interval. New input capture D events are disabled

during the mask interval.

A mask interval is not generated when the ICRDMS bit is set to 1 and the contents of OCRDM are

H'0000.

OCRDM is initialized to H'0000 by a reset and in hardware standby mode.

11.2.6

Timer Interrupt Enable Register (TIER)

Bit

Initial value

Read/Write

ICIAE

R/W

ICIBE

R/W

ICICE

R/W

ICIDE

OCIAE

R/W

—

OCIBE

R/W

OVIE

R/W

TIER is an 8-bit readable/writable register that enables and disables interrupts.

TIER is initialized to H'01 by a reset and in hardware standby mode.

Bit 7—Input Capture Interrupt A Enable (ICIAE): Selects whether to request input capture

interrupt A (ICIA) when input capture flag A (ICFA) in TCSR is set to 1.

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