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HD404849FS Datasheet(PDF) 30 Page - Renesas Technology Corp

Part # HD404849FS
Description  4-Bit Single-Chip Microcomputer
PDF  127 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404849FS Datasheet(HTML) 30 Page - Renesas Technology Corp

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HD404849 Series
28
Operating Modes
The MCU has five operating modes as shown in table 19. The operations in each mode are listed in tables
20 and 21. Transitions between operating modes are shown in figure 14.
Table 19 Operating Modes and Clock Status
Mode Name
Active
Standby
Stop
Watch
Subactive*
2
Activation
method
Reset
cancellation,
interrupt
request
STOPC
cancellation in
stop mode,
STOP/SBY
instruction in
subactive
mode (when
direct transfer
is selected)
SBY
instruction
STOP
instruction
when
TMA3 = 0
STOP
instruction
when
TMA3 = 1
INT
0 or timer A
interrupt
request from
watch mode
Status
System
oscillator
OP
OP
Stopped
Stopped
Stopped
Subsystem
oscillator
OP
OP
OP *
1
OP
OP
Cancellation
method
RESET input,
STOP/SBY
instruction
RESET input,
interrupt
request
RESET input,
STOPC input
in stop mode
RESET input
INT
0 or timer A
interrupt
request
RESET input,
STOP/SBY
instruction
Notes: OP implies in operation.
1. Operating or stopping the oscillator can be selected by setting bit 3 of the system clock select
register (SSR: $029).
2. Subactive mode is an optional function; specify it on the function option list.



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