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HD404848FS Datasheet(PDF) 41 Page - Hitachi Semiconductor

Part # HD404848FS
Description  4-Bit Single-Chip Microcomputer
PDF  125 Pages
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Manufacturer  HITACHI [Hitachi Semiconductor]
Direct Link  http://www.renesas.com/eng
Logo HITACHI - Hitachi Semiconductor

HD404848FS Datasheet(HTML) 41 Page - Hitachi Semiconductor

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HD404849 Series
41
Bit
Initial value
Read/Write
Bit name
3
0
W
SSR3*
2
0
W
SSR2
0
—
—
Not used
1
0
W
SSR1
System clock select register (SSR: $029)
SSR1
0
1
SSR2
0
1
ratio selection
fSUB = fX/8
fSUB = fX/4
SSR3
0
1
32-kHz oscillation stop
Oscillation operates in stop mode
Oscillation stops in stop mode
32-kHz oscillation division
System oscillation frequency selection
0.4 MHz – 1.0 MHz
1.6 MHz – 4.5 MHz
Note: * SSR3 is cleared only by a
RESET input. SSR3 will not be cleared by a STOPC input during
stop mode, and will retain its value.
SSR3 will also not be cleared upon entering stop mode.
Figure 26 System Clock Select Register



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