HD404828RFS datasheet(38/149 Pages) RENESAS

38 / 149 page

HD404829R Series

Direct Transition from Subactive Mode to Active Mode: Available by controlling the direct transfer on

flag (DTON: $020, bit 3) and the low speed on flag (LSON: $020, bit 0). The procedures are described

below:

• Set LSON to 0 and DTON to 1 in subactive mode.

• Execute the STOP or SBY instruction.

• The MCU automatically enters active mode from subactive mode after waiting for the MCU internal

processing time and oscillation stabilization time (figure 19).

Notes: 1. The DTON flag can be set only in subactive mode. It is always reset in active mode.

2. The transition time (TD) from subactive mode to active mode:

tRC < TD < T + tRC

Bit

Initial value

Read/Write

Bit name

MIS3

MIS2

MIS0

MIS1

Miscellaneous register (MIS: $00C)

MIS1

MIS0

T *

0.24414 ms

tRC

0.12207 ms

0.24414 ms

7.8125 ms

31.25 ms

Not used

Oscillation circuit conditions

External clock input

Ceramic oscillator

Crystal oscillator

15.625 ms

62.5 ms

Not used

—

Notes: 1.

Values of T and tRC when a 32.768-kHz crystal oscillator is used to pins ×1 and ×2.

The value is applied only when direct transfer operation is used.

Buffer control.

Refer to figure 41.

MIS3

MIS2

* 1

* 2

Figure 18 Miscellaneous Register (MIS)

Subactive mode

Interrupt strobe

Direct transfer

completion timing

MCU internal

processing time

Oscillation

stabilization

time

Active mode

T :

STOP/SBY instruction execution

(Set LSON = 0, DTON = 1)

Interrupt frame length

Oscillation stabilization period

Direct transition time

Figure 19 Direct Transition Timing

HD404828RFS Datasheet(PDF) 38 Page - Renesas Technology Corp

HD404828RFS Datasheet(HTML) 38 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL