Datasheet

Rev. 2.00 Jul. 04, 2007 Page 666 of 692
REJ09B0309-0200
Item Page Revisions (See Manual for Details)
Modified
No. Execution Status Number of States
1 Interrupt mask level determination
1 or 2*
1
Total 18 to 41
Table 4.4 Interrupt Response
Times (States)
81
Notes: 1. One state in case of an internal interrupt
(2 states in case of an external interrupt).
2. Prefetch after interrupt acceptance and interrupt
handling routine prefetch.
3. Internal processing after interrupt acceptance and
internal processing after vector fetch.
Section 5 Clock Pulse Generator
5.3.1 Connecting 32.768-
kHz/38.4-kHz Crystal Resonator
Figure 5.5 Typical Connection to
32.768-kHz/38.4-kHz Crystal
Resonator
91
Modified
Equivalent Series Resistance
35 kΩ (max.)
30 kΩ (max.)
5.3.1 Connecting 32.768-
kHz/38.4-kHz Crystal Resonator
91 Added
1. When using a resonator other than the above, ensure
optimal conditions by conducting sufficient evaluation of
consistency in cooperation with the manufacturer of the
resonator. Even if the above resonators or products
equivalent to them are implemented, their oscillation
characteristics are affected by the board design. Be sure to
use the actual board to evaluate consistency as a system.
2. The consistency as a system has to be verified not only in a
reset state (i.e., the RES pin is driven low) but also in a state
where a reset state has been exited (i.e., the low-level RES
signal has been driven high).
Figure 5.6 shows the equivalent circuit of the crystal resonator.
Figure 5.6 Equivalent Circuit of
32.768-kHz Crystal Resonator
92 Added
C
S
C
O
L
R
S
X1
X2
C = 0.9 pF (typ.)
R = 50 kΩ (typ.)
φ = 32.768 kHz/38.4kHz
O
S
W
S