MC908QL4ME View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC908QL4ME

M68HC08 Microcontrollers

Freescale Semiconductor 

Configuration Register (CONFIG)

IRQPUD — IRQ Pin Pullup Control Bit

1 = Internal pullup is disconnected

0 = Internal pullup is connected between IRQ pin and VDD

IRQEN — IRQ Pin Function Selection Bit

1 = Interrupt request function active in pin

0 = Interrupt request function inactive in pin

OSCENINSTOP— Oscillator Enable in Stop Mode Bit

OSCENINSTOP, when set, will allow the clock source to continue to generate clocks in stop mode.

This function can be used to keep the auto-wakeup running while the rest of the microcontroller stops.

When clear, the clock source is disabled when the microcontroller enters stop mode.

1 = Oscillator enabled to operate during stop mode

0 = Oscillator disabled during stop mode

RSTEN — RST Pin Function Selection

1 = Reset function active in pin

0 = Reset function inactive in pin

NOTE

The RSTEN bit is cleared by a power-on reset (POR) only. Other resets will

leave this bit unaffected.

Bit 7

6

Read:

COPRS LVISTOP

Write:

Reset: 0

0

POR: 0

0

U = Unaffected

5

LVIRSTD

0

0

4

LVIPWRD

0

0

3

LVITRIP

U

0

2

SSREC

0

0

1

STOP

0

0

Bit 0

COPD

0

0

Figure 5-2. Configuration Register 1 (CONFIG1)

COPRS (Out of Stop Mode) — COP Reset Period Selection Bit

1 = COP reset short cycle = 8176 × BUSCLKX4

0 = COP reset long cycle = 262,128 × BUSCLKX4

COPRS (In Stop Mode) — Auto Wakeup Period Selection Bit, depends on OSCSTOPEN in

CONFIG2 and external clock source

1 = Auto wakeup short cycle = 512 × (INTRCOSC or BUSCLKX4)

0 = Auto wakeup long cycle = 16,384 × (INTRCOSC or BUSCLKX4)

LVISTOP — LVI Enable in Stop Mode Bit

When the LVIPWRD bit is clear, setting the LVISTOP bit enables the LVI to operate during stop mode.

Reset clears LVISTOP.

1 = LVI enabled during stop mode

0 = LVI disabled during stop mode

LVIRSTD — LVI Reset Disable Bit

LVIRSTD disables the reset signal from the LVI module.

1 = LVI module resets disabled

0 = LVI module resets enabled

MC68HC908QL4 Data Sheet, Rev. 7

64

Freescale Semiconductor

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