Page 28
2. Operational Description
2.2 System Clock Controller
T
5CL8
2.2.4.4 SLOW mode
SLOW mode is controlled by the system control register 2 (SYSCR2).
The following is the methods to switch the mode with the warm-up counter.
(1) Switching from NORMAL2 mode to SLOW1 mode
First, set SYSCR2<SYSCK> to switch the main system clock to the low-frequency clock for
SLOW2 mode. Next, clear SYSCR2<XEN> to turn off high-frequency oscillation.
Note: The high-frequency clock can be continued oscillation in order to return to NORMAL2 mode from
SLOW mode quickly. Always turn off oscillation of high-frequency clock when switching from
SLOW mode to stop mode.
Example 1 :Switching from NORMAL2 mode to SLOW1 mode.
SET
(SYSCR2). 5
; SYSCR2<SYSCK>
←
1
(Switches the main system clock to the low-frequency
clock for SLOW2)
CLR
(SYSCR2). 7
; SYSCR2<XEN>
←
0
(Turns off high-frequency oscillation)
Example 2 :Switching to the SLOW1 mode after low-frequency clock has stabilized.
SET
(SYSCR2). 6
; SYSCR2<XTEN>
←
1
LD
(TC5CR), 43H
; Sets mode for TC6, 5 (16-bit mode, fs for source)
LD
(TC6CR), 05H
; Sets warming-up counter mode
LDW
(TTREG5), 8000H
; Sets warm-up time (Depend on oscillator accompanied)
DI
; IMF
←
0
SET
(EIRE). 2
; Enables INTTC6
EI
; IMF
←
1
SET
(TC6CR). 3
; Starts TC6, 5
:
PINTTC6:
CLR
(TC6CR). 3
; Stops TC6, 5
SET
(SYSCR2). 5
; SYSCR2<SYSCK>
←
1
(Switches the main system clock to the low-frequency clock)
CLR
(SYSCR2). 7
; SYSCR2<XEN>
←
0
(Turns off high-frequency oscillation)
RETI
:
VINTTC6:
DW
PINTTC6
; INTTC6 vector table
Содержание CEM2100/00
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Страница 13: ...PCB LAYOUT PANEL BOARD TOP SIDE VIEW ...
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Страница 16: ...PCB LAYOUT REMOTE BOARD BOTTOM SIDE VIEW 16 ...
Страница 17: ...PCB LAYOUT TUNER BOARD TOP SIDE VIEW 17 ...
Страница 18: ...PCB LAYOUT TUNER BOARD BOTTOM SIDE VIEW 18 ...
Страница 19: ...PCB LAYOUT SD BOARD TOP SIDE VIEW ...
Страница 20: ...20 PCB LAYOUT CD CONNECTOR TOP SIDE VIEW ...
Страница 21: ...PCB LAYOUT ISO BOARD BOTTOM SIDE VIEW 21 ...
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Страница 113: ...Revision History Date Revision 2008 7 31 1 First Release ...
Страница 114: ......
Страница 122: ...viii ...
Страница 126: ...Page 4 1 3 Block Diagram T5CL8 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 130: ...Page 8 1 4 Pin Names and Functions T5CL8 ...
Страница 155: ...Page 33 T5CL8 ...
Страница 156: ...Page 34 2 Operational Description 2 3 Reset Circuit T5CL8 ...
Страница 186: ...Page 64 5 I O Ports 5 8 Port P7 P77 to P70 T5CL8 ...
Страница 194: ...Page 72 6 Watchdog Timer WDT 6 3 Address Trap T5CL8 ...
Страница 214: ...Page 92 8 16 Bit TimerCounter 1 TC1 8 3 Function T5CL8 ...
Страница 270: ...Page 148 12 Asynchronous Serial interface UART1 12 9 Status Flag T5CL8 ...
Страница 280: ...Page 158 13 Asynchronous Serial interface UART2 13 9 Status Flag T5CL8 ...
Страница 332: ...Page 210 16 Serial Bus Interface I2C Bus Ver D SBI 16 6 Data Transfer of I2C Bus T5CL8 ...
Страница 342: ...Page 220 17 10 bit AD Converter ADC 17 6 Precautions about AD Converter T5CL8 ...
Страница 354: ...Page 232 19 Flash Memory 19 4 Access to the Flash Memory Area T5CL8 ...
Страница 388: ...Page 266 21 Input Output Circuit 21 2 Input Output Ports T5CL8 ...
Страница 397: ...Page 275 T5CL8 23 Package Dimensions LQFP64 P 1010 0 50D Rev 01 Unit mm ...
Страница 398: ...Page 276 23 Package Dimensions T5CL8 ...
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Страница 428: ...TC94B14MFG 2010 01 12 28 Package LQFP80 P 1212 0 50F Weight 0 6 g Typical ...