SH7101 datasheet(169/486 Pages) RENESAS

169 / 486 page

8. Multi-Function Timer Pulse Unit (MTU)

Rev.2.00 Sep. 27, 2007 Page 135 of 448

REJ09B0394-0200

8.3.13

Timer Subcounter (TCNTS)

TCNTS is a 16-bit read-only counter that is used only in complementary PWM mode. The initial

value is H'0000.

Note:

Accessing the TCNTS in 8-bit units is prohibited. Always access in 16-bit units.

8.3.14

Timer Dead Time Data Register (TDDR)

TDDR is a 16-bit register, used only in complementary PWM mode, that specifies the TCNT_3

and TCNT_4 counter offset values. In complementary PWM mode, when the TCNT_3 and

TCNT_4 counters are cleared and then restarted, the TDDR register value is loaded into the

TCNT_3 counter and the count operation starts. The initial value is H'FFFF.

Note:

Accessing the TDDR in 8-bit units is prohibited. Always access in 16-bit units.

8.3.15

Timer Period Data Register (TCDR)

TCDR is a 16-bit register used only in complementary PWM mode. Set half the PWM carrier

sync value as the TCDR register value. This register is constantly compared with the TCNTS

counter in complementary PWM mode, and when a match occurs, the TCNTS counter switches

direction (decrement to increment). The initial value is H'FFFF.

Note:

Accessing the TCDR in 8-bit units is prohibited. Always access in 16-bit units.

8.3.16

Timer Period Buffer Register (TCBR)

The timer period buffer register (TCBR) is a 16-bit register used only in complementary PWM

mode. It functions as a buffer register for the TCDR register. The TCBR register values are

transferred to the TCDR register with the transfer timing set in the TMDR register. The initial

value is H'FFFF.

Note:

Accessing the TCBR in 8-bit units is prohibited. Always access in 16-bit units.

SH7101 Datasheet(PDF) 169 Page - Renesas Technology Corp