參數(shù)資料
型號: M306K9F8LRP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144
封裝: 16 X 16 MM, 0.40 MM PITCH, PLASTIC, TQFP-144
文件頁數(shù): 49/101頁
文件大?。?/td> 2590K
代理商: M306K9F8LRP
Clock Generating Circuit
Rev.1.00
Jun 06, 2003
page 34 of 290
M16C/6K9 Group
Clock Output
In single-chip mode, the clock output function select bits (bits 0 and 1 at address 000616) enable f8, f32, or fc
to be output from the P57/CLKOUT pin. When the WAIT peripheral function clock stop bit (bit 2 at address
000616) is set to “1”, the output of f8 and f32 stops when a WAIT instruction is executed.
By setting the f1 output function selection bits (bit0 and bit1 of address 02F116) ,f1 can be output via P110
and P111.
By setting P110 output clock selection bit (bit7 of address 02F816), the clock output via P110 can be selected
to f1 or fc.
Stop Mode
Writing “1” to the all-clock stop control bit (bit 0 at address 000716) stops all oscillation and the microcom-
puter enters stop mode. In stop mode, the content of the internal RAM is retained provided that VCC remains
above 2V.
The oscillation , BCLK, f1 to f32, f1SIO2 to f32SIO2, fC, fC32, and fAD stop in stop mode, peripheral functions
such as the A-D converter and watchdog timer do not function. However, timer A and timer B operate
provided that the event counter mode is set to an external pulse, and UARTi(i = 0 to 2) ,SIO3,4 functions
provided an external clock is selected. Table.WA-2 shows the status of the ports in stop mode.
Stop mode is cancelled by a hardware reset or interrupt. If an interrupt is to be used to cancel stop mode, that
interrupt must first have been enabled.After the restoration by interrupt, the corresponding interrupt routine
will be processed.When shifting from high speed mode or mid-speed mode to stop mode, the main clock
division select bit 0 (bit 6 at 000616) is set to “1”.
Table.WA-2 Port status during stop mode
Pin
Single-chip mode
Port
Retains status before stop mode
CLKOUT
When fc selected
“H”
When f8, f32 selected
Retains status before stop mode
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