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HD404618TF Datasheet(PDF) 26 Page - Renesas Technology Corp

Part # HD404618TF
Description  4-Bit Single-Chip Microcomputer
PDF  91 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404618TF Datasheet(HTML) 26 Page - Renesas Technology Corp

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HD404618 Series
24
Operating Modes
The MCU has five operating modes that are specified by how the clock is used. The functions available in
each mode are listed in table 15, and operations are shown in table 16. Transitions between operating
modes are shown in figure 10. Table 17 provides additional information for table 15.
Table 15 Functions Available in Each Operating Mode
Mode Name
Active
Standby
Stop
Watch
Subactive*
4
Activation
method
Reset
cancellation,
interrupt
request
SBY
instruction
TMA3 = 0,
STOP
instruction
TMA3 = 1,
STOP
instruction
INT
0 or timer
A interrupt
request from
watch mode
Status
System
oscillator
Operating
Operating
Stopped
Stopped
Stopped
Subsystem
oscillator
Operating
Operating
Operating*
1
Operating
Operating
Instruction
execution
(ø
CPU)
Operating
Stopped
Stopped
Stopped
Operating
Peripheral
function
interrupt(ø
PER)
Operating
Operating
Stopped
Stopped
Operating
Clock function
interrupt (ø
CLK)
Operating
Operating
Stopped
Operating*
2
Operating*
2
RAM
Operating
Retained
Retained
Retained
Operating
Registers/
flags
Operating
Retained
Reset
Retained
Operating
I/O
Operating
Retained
High
impedance*
3
Retained*
3
Operating*
3
Cancellation
method
RESET input,
STOP/SBY
instruction
RESET input,
interrupt
request
RESET input RESET input,
INT
0 or timer
A interrupt
request
RESET input,
STOP/SBY
instruction
Notes: 1. To reduce current dissipation, stop all oscillation in external circuits.
2. Refer to the Interrupt Frame section for details.
3. Refer to table 17.
4. Subactive mode is an optional function, specify it on the function option list.
5. In the watch and subactive modes, the MCU requires a 32.768-kHz crystal oscillator.



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