SPMCK16Z4MPV20 datasheet(387/500 Pages) FREESCALE

387 / 500 page

M68HC16 Z SERIES

USER’S MANUAL

D-13

The following equation calculates the time-out period for an externally input clock fre-

quency on both slow and fast reference frequency devices, when fsys is equal to the

system clock frequency.

HME — Halt Monitor Enable

0 = Halt monitor is disabled.

1 = Halt monitor is enabled.

BME — Bus Monitor External Enable

0 = Disable bus monitor for external bus cycles.

1 = Enable bus monitor for external bus cycles.

BMT[1:0] — Bus Monitor Timing

This field selects the bus monitor time-out period. Refer to Table D-7.

D.2.13 Periodic Interrupt Control Register

PICR sets the interrupt level and vector number for the periodic interrupt timer (PIT).

Bits [10:0] can be read or written at any time. Bits [15:11] are unimplemented and al-

ways read zero.

PIRQL[2:0] — Periodic Interrupt Request Level

This field determines the priority of periodic interrupt requests. A value of %000 dis-

ables PIT interrupts.

Table D-7 Bus Monitor Time-Out Period

BMT[1:0]

Bus Monitor Time-Out Period

64 system clocks

32 system clocks

16 system clocks

8 system clocks

PICR — Periodic Interrupt Control Register

$YFFA22

PIRQL[2:0]

PIV[7:0]

RESET:

Time-out Period

128

() Divide Ratio Specified by SWP and SWT[1:0]

()

ref

--------------------------------------------------------------------------------------------------------------------------------------------

Time-out Period

Divide Ratio Specified by SWP and SWT[1:0]

sys

------------------------------------------------------------------------------------------------------------------------

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

SPMCK16Z4MPV20 Datasheet(PDF) 387 Page - Freescale Semiconductor, Inc

SPMCK16Z4MPV20 Datasheet(HTML) 387 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL