LM8322 datasheet(9/42 Pages) NSC

Part #	LM8322

Description	Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface

PDF	42 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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9 / 42 page

9.3 CLOCK CONFIGURATION

Table 2 shows the clock configurations available by loading

the clock configuration register with the WRITE_CLOCK com-

mand. The WRITE_CLOCK command must be issued only

once during system initialization. This command is used to

override the default settings.

TABLE 2. Clock Configuration Register

SLOWCLKOUT

SLOWCLKEN

RCPWM

Bit

Value

Description

SLOWCLKOUT

Disable SLOWCLKOUT buffer.

Enable SLOWCLKOUT buffer.

SLOWCLKEN

External 32.768 kHz crystal is installed between the XTAL_IN and XTAL_OUT pins.

External 32.768 kHz clock is received on the SLOWCLK pin, or no 32.768 kHz clock

is required.

RCPWM

On-chip RC clock divided by 64 drives the PWM and clock buffer.

Reserved.

External 32.768 kHz clock or crystal drives the PWM and clock buffer.

The SLOWCLKOUT signal is an alternate function of the pin

used for the KP-Y8 scanning output and the GPIO_03 port. If

the SLOWCLKOUT function is enabled, these other functions

of the pin are unavailable.

LM8322 Datasheet(PDF) 9 Page - National Semiconductor (TI)