SH7101 datasheet(417/560 Pages) RENESAS

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Section 13 Motor Management Timer (MMT)

Rev.1.00 Sep. 18, 2008 Page 383 of 522

REJ09B0069-0100

13.7

Usage Notes

13.7.1

Module Standby Mode Setting

MMT operation can be disabled or enabled using the module standby control register. The initial

setting is for MMT operation to be halted. Register access is enabled by clearing module standby

mode. For details, refer to section 18, Power-Down Modes.

13.7.2

Notes on MMT Operation

Note that the kinds of operation and contention described below occur during MMT operation.

(1) Contention between Buffer Register Write and Compare Match

If a compare match occurs in the T2 state of a buffer register (TBRU to TBRW, or TPBR) write

cycle, data is transferred from the buffer register to the compare register (TGR or TPDR) by a

buffer operation. The data transferred is the buffer register write data.

Figure 13.14 shows the timing in this case.

Buffer register write data

Address

Compare match

signal

Interrupt request

signal

Buffer register

Compare register

Write signal

Buffer register

address

Buffer register

write cycle

Figure 13.14 Contention between Buffer Register Write and Compare Match

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