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7733 Datasheet(PDF) 451 Page - Renesas Technology Corp

Part # 7733
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Datasheet(HTML) 451 Page - Renesas Technology Corp

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APPLICATIONS
7733 Group User’s Manual
17–44
17.4 Power saving
Power saving examples (in other words, examples to save power consumption) with the stop or wait mode
used are described below.
17.4.1 Power saving example with stop mode used
In this example, power saving is realized by using the stop mode. The stop mode is terminated by using
the key input interrupt function.
(1) Specifications
ΠThe microcomputer operates in the single-chip mode.
 Pins P50 to P53 are used as output pins for the key matrix scanning.
Input pins (KI0 to KI3) for the key input interrupt function are used as key input pins.
Pins KI0 to KI3 are pulled high by using the pull-up function.
Ž The initial output levels of pins P50 to P53 are “L.”
 When a key input interrupt request occurs owing to a key push, the key data is read-in. (This
reading is surely performed independent of power saving.)
 In the stop mode, interrupts other than a key input interrupt are disabled.
‘ An external clock is used as the main clock.
17.4 Power saving



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