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7733 Scheda tecnica(PDF) 374 Page - Renesas Technology Corp

Il numero della parte 7733
Spiegazioni elettronici  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Scheda tecnica(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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