HC05 datasheet(34/232 Pages) MOTOROLA

Part #	HC05

Description	High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

PDF	232 Pages

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Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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34 / 232 page

MOTOROLA

2-10

MC68HC05X16

Rev. 1

MODES OF OPERATION AND PIN DESCRIPTIONS

2.2.3.1

Miscellaneous register

SM — Slow mode

1 (set)

–

The system runs at a bus speed 16 times lower than normal (fOSC/32,

/64, /128 or /160). SLOW mode affects all sections of the device

(including SCI, A/D and timer) except for the MCAN module.

0 (clear) –

The system runs at normal bus speed (fOSC/2, /4, /8 or /10).

The SM bit is cleared by external or power-on reset. The SM bit is automatically cleared when

entering STOP mode.

Note:

The bits shown shaded in the above representation are explained individually in the

relevant sections of this manual. The complete register plus an explanation of each bit

can be found in Section 3.8.

Figure 2-5 Slow mode divider block diagram

Address

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

State

on reset

Miscellaneous

$000C

POR

INTP

INTN

INTE

SFA

SFB

WDOG u001 000u

OSC1

OSC2

Oscillator

fOSC

Control logic

SM–bit

÷ 2, 4,

Main internal clock

(bit 1, $000C)

MCAN

Note:

The MCAN module clock is unaffected during SLOW mode.

8 and 10

÷ 2

÷ 16

HC05 Datasheet(PDF) 34 Page - Motorola, Inc

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