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7733 데이터시트(PDF) 374 Page - Renesas Technology Corp

부품명 7733
상세설명  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 데이터시트(HTML) 374 Page - Renesas Technology Corp

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CLOCK GENERATING CIRCUIT
7733 Group User’s Manual
14–11
14.3.2 System clock switching procedure
Figures 14.3.6 to 14.3.8 show the system clock switching procedure.
14.3 Clock control
Fig. 14.3.6 System clock switching procedure (1)
State of bits 4 to 1 of the oscillation circuit control register 0 when switching the system clock
Stopped
Operating
Operating
Port-Xc selection bit (bit 4)
System clock selection bit (bit 3)
Main clock stop bit (bit 2)
(Sub-clock oscillation circuit: Oscillating)
(Main clock)
(Sub clock)
(Main clock)
(Stopped)
(Oscillating)
ab
“1”
“0”
“1”
“0”
“1”
“0”
System clock
Main clock
Sub clock
Main clock
(Main-clock oscillation
circuit: Oscillating)
Oscillation of the main-clock oscillation circuit
Oscillation stabilizing time
Stopped
Operating
Oscillation of the sub-clock oscillation circuit
Oscillation stabilizing time
Notes 1: Before selecting the sub clock, make sure that oscillation of the sub clock is fully stabilized after oscillation starts.
2: Before selecting the main clock, make sure that oscillation of the main clock is fully stabilized after oscillation restarts.
(Note 1)
(Note 2)



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