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11. Divider Output (DVO)
11.2 Control
TMP89FM42
RA001
The divider output is enabled by setting DVOCR<DVOEN> to "1". Then, The rectangular waves selected by
DVOCR<DVOCK> is output from
DVO
pin.
It is disabled by clearing DVOVR<DVOEN> to "0". And
DVO
pin keeps "H" level.
When the operation is changed to STOP or IDLE0/SLEEP0 mode, DVOCR<DVOEN> is cleared to "0" and
the
DVO
pin outputs the "H" level.
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
set at DVOCR<DVOCK>.
When the operation is changed to the software, STOP or IDLE0/SLEEP0 mode is activated and
DVOCR<DVOEN> is cleared to "0", the frequency of the divider output is not the frequency set at
DVOCR<DVOCK>.
Figure 11-2 Divider Output Timing
When the operation is changed from NORMAL mode to SLOW mode or from SLOW mode to NORMAL
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).
Example: 2.441 kHz pulse output (fcgck = 10.0 MHz)
LD
(DVOCR), 00000100B
; DVOCK
←
"00", DVOEN
←
"1"
Table 11-1 Divider Output Frequency (Example: fcgck = 10.0 MHz, fs = 32.768 kHz)
DVOCK
Divider output frequency [Hz]
NORMAL 1/2, IDLE 1/2 mode
SLOW1/2, SLEEP1
mode
DV9CK = 0
DV9CK = 1
00
2.441 k
1.024 k
1.024 k
01
4.883 k
2.048 k
2.048 k
10
9.766 k
4.096 k
4.096 k
11
19.531 k
Reserved
Reserved
TBTCR<DVOEN>
Divider output timing chart
DVO output
Содержание TLCS-870/C1 Series
Страница 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......