tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 148
tmp89fm42
Manufacturer Part Number
tmp89fm42
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42.pdf
(408 pages)
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11.2 Control
11. Divider Output (DVO)
RA001
DVOCR<DVOCK> is output from
the
set at DVOCR<DVOCK>.
DVOCR<DVOEN> is cleared to "0", the frequency of the divider output is not the frequency set at
DVOCR<DVOCK>.
mode, the divider output frequency does not reach the expected value due to synchronization of the gear clock
(fcgck) and the low-frequency clock (fs).
The divider output is enabled by setting DVOCR<DVOEN> to "1". Then, The rectangular waves selected by
It is disabled by clearing DVOVR<DVOEN> to "0". And
When the operation is changed to STOP or IDLE0/SLEEP0 mode, DVOCR<DVOEN> is cleared to "0" and
The divider output source clock operates, regardless of the value of DVOCR<DVOEN>.
Therefore, the frequency of the first divider output after DVOCR<DVOEN> is set to "1" is not the frequency
When the operation is changed to the software, STOP or IDLE0/SLEEP0 mode is activated and
When the operation is changed from NORMAL mode to SLOW mode or from SLOW mode to NORMAL
DVO
Example: 2.441 kHz pulse output (fcgck = 10.0 MHz)
pin outputs the "H" level.
Table 11-1 Divider Output Frequency (Example: fcgck = 10.0 MHz, fs = 32.768 kHz)
LD
DVOCK
00
01
10
11
TBTCR<DVOEN>
DVO output
(DVOCR), 00000100B
Figure 11-2 Divider Output Timing
DV9CK = 0
19.531 k
2.441 k
4.883 k
9.766 k
NORMAL 1/2, IDLE 1/2 mode
DVO
pin.
Divider output timing chart
Divider output frequency [Hz]
Page 134
DV9CK = 1
Reserved
1.024 k
2.048 k
4.096 k
; DVOCK m "00", DVOEN m "1"
DVO
pin keeps "H" level.
SLOW1/2, SLEEP1
Reserved
1.024 k
2.048 k
4.096 k
mode
TMP89FM42
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