Rainbow-electronics AT77C104B Uživatelský manuál stáhnout pdf (Strana 13)

AT77C104B

5347B–BIOM–08/04

Modectrl Register Register Name:Modectrl (7 bits)

Access Type:Read/Write

Function:Mode control

• MODE: select operating mode

0000: standby

0001: test (reserved for factory use)

0010: click

0100: navigation

1000: acquisition

Certain changes can be made. For example, MODE can be set to 0b0110 to activate

click and navigation.

• ANALOGRST: reset local oscillator

0: oscillator in active mode

1: oscillator in power-down mode

Notes: 1. Click or navigation modes cannot be used when the local oscillator is switched off. .

2. To return to standby mode and stop the oscillator (to save on power consumption),

two Modectrl register accesses are

necessary: the first one to select standby mode and the second to switch off the

oscillator.

3. The read-only registers cannot be read when the oscillator is turned off.

4. To shift between navigation and acquisition modes, you must be in standby mode

(Modectrl = 0b00001).

If modes such as “acquisition and click” or “acquisition and navigation” are programmed

together, they will be ignored by the system.

With x = 0 or 1.

b6 b5 b4 b3 b2 b1 b0

MODE (MSB) MODE MODE MODE (LSB) ANALOGRST – –

0000100

Programmed Mode Register Value

11xx 01xx

1x1x 0x1x

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 35 36

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Rainbow-electronics AT77C104B Uživatelský manuál Strana 13