TMP86FS28DFG datasheet(204/272 Pages) TOSHIBA

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Page 192

15. Key-on Wakeup (KWU)

15.3 Function

TMP86FS28DFG

Also, each level of the STOP2 to STOP5 pins can be confirmed by reading corresponding I/O port data register,

check all STOP2 to STOP5 pins "H" that is enabled by STOPCR before the STOP mode is started (Note2,3).

Note 1: When the STOP mode released by the edge release mode (SYSCR1<RELM> = “0”), inhibit input from STOP2 to

STOP5 pins by Key-on Wakeup Control Register (STOPCR) or must be set "H" level into STOP2 to STOP5 pins

that are available input during STOP mode.

Note 2: When the STOP pin input is high or STOP2 to STOP5 pins input which is enabled by STOPCR is low, executing an

instruction which starts STOP mode will not place in STOP mode but instead will immediately start the release

sequence (Warm up).

Note 3: The input circuit of Key-on Wakeup input and Port input is separated, so each input voltage threshold value is dif-

ferent. Therefore, a value comes from port input before STOP mode start may be different from a value which is

detected by Key-on Wakeup input (Figure 15-2).

Note 4: STOP pin doesn’t have the control register such as STOPCR, so when STOP mode is released by STOP2 to

STOP5 pins, STOP pin also should be used as STOP mode release function.

Note 5: In STOP mode, Key-on Wakeup pin which is enabled as input mode (for releasing STOP mode) by Key-on

Wakeup Control Register (STOPCR) may generate the penetration current, so the said pin must be disabled AD

conversion input (analog voltage input).

Note 6: When the STOP mode is released by STOP2 to STOP5 pins, the level of STOP pin should hold "L" level (Figure

15-3).

Figure 15-2 Key-on Wakeup Input and Port Input

Figure 15-3 Priority of STOP pin and STOP2 to STOP5 pins

Table 15-1 Release level (edge) of STOP mode

Pin name

Release level (edge)

SYSCR1<RELM>="1"

(Note2)

SYSCR1<RELM>="0"

STOP

"H" level

Rising edge

STOP2

"L" level

Don’t use (Note1)

STOP3

"L" level

Don’t use (Note1)

STOP4

"L" level

Don’t use (Note1)

STOP5

"L" level

Don’t use (Note1)

Port input

External pin

Key-on wakeup

input

STOP pin

a) STOP

Release

STOP mode

STOP pin "L"

Release

STOP mode

In case of STOP2 to STOP5

STOP2 pin

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