RENESAS TECHNICAL UPDATE

TN-RL*-A024A/E

Date: Apr. 9, 2014

Page 21 of 37

7.

14. 5

Caution for Using Timer KB Simultaneous Operation Function

As respects of INTP2m and comparator, Caution for Using Timer KB Simultaneous Operation Function is added.

Incorrect:

No applicable item

Correct:

14. 5

Caution for Using Timer KB Simultaneous Operation Function

In addition to their use as an external interrupt input, the INTP2m pin output and the comparator output signal can be used as

a trigger for functions that operate simultaneously with timer KB, such as the forced output stop function and timer restart

function. The settings in peripheral function switch register 0 (PFSEL0) and the edge selection registers must be specified

according to the function used. The width of the active signal required until each function starts operating differs.

When using INTP2m or the comparator output signal, refer to Tables 14-4 to 14-6 to specify the necessary register settings,

and configure external circuits so that the required active signal width is assured.

Table 14-4. Relationship of INTP2m function, register settings, and active signal width

Function

Peripheral enable

register setting

Edge setting

registers

Necessary active signal width to operate each function

Interrupt

Forced output stop

Timer restart

External interrupt

(STOP release is

enabled)

TMRSTENm = 0

EGPn, EGNn

-

-

Forced output stop

Note 1

TMRSTENm = 1

CEGPp, CEGNp

Note 2

55 to 215 ns

Note 3, 5

-

Timer restart

TMRSTENm = 1

CEGPp, CEGNp

-

Figure 14-18.

Generation Timing of Forced Output Stop Signal and Timer Restart Request Signal by INTP2m

INTP2m pin

Timer restart

request signal,

Interrupt request signal

Forced output stop

Internal wait time (55 to 215 ns

)

Note 3, 5

Edge comfirming time (2 to 3 clocks

)

Note 4, 6

Notes 1.

Only INTP20 can be used as a trigger for forced output stop function 2.

2.

The active level of INTP20 (used for forced output stop function 2) is high. Edge selection is only applied to

detection of an interrupt signal.

3.

5 to 15 ns when noise filtering on INTP20 is disabled (PNFEN = 1)

4.

5.

An additional output delay time (10 to 40 ns) is required from when forced output stop function 2 starts

operating to when the level of the timer KB output changes.