HD404339FS datasheet(24/80 Pages) RENESAS

tên linh kiện	HD404339FS

Giải thích chi tiết về linh kiện	microcomputer with large-capacity memory designed to

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nhà sản xuất	RENESAS [Renesas Technology Corp]

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HD404339 Series

The MCU automatically provides an oscillation stabilization period t

RC when operation switches from

watch mode to active mode. The interrupt frame period T and one of three values for t

RC can be selected

with the miscellaneous register (MIS: $00C), as listed in figure 14.

Operation can switch directly from subactive mode to active mode, as illustrated in figure 15. In this case,

the transition time T

D obeys the following relationship.

RC < TD < T + t RC

Bit

Initial value

Read/Write

Bit name

MIS3

MIS2

MIS0

MIS1

Miscellaneous register (MIS: $00C)

MIS1

MIS0

T*1

0.24414 ms

tRC*1

0.12207 ms

0.24414 ms*2

7.8125 ms

62.5 ms

Oscillation Circuit Conditions

External clock input

Ceramic oscillator

15.625 ms

125 ms

Not used

—

Notes: 1.

The values of T and tRC are applied when a 32.768-kHz crystal oscillator is used.

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

Buffer control.

Refer to figure 24.

MIS3

MIS2

Crystal oscillator

Figure 14 Miscellaneous Register

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