MC9S08DZ96F2CLL datasheet(177/458 Pages) FREESCALE

177 / 458 page

Chapter 8 Multi-Purpose Clock Generator (S08MCGV2)

MC9S08DZ128 Series Data Sheet, Rev. 1

Freescale Semiconductor

177

8.3.6

MCG Test and Control Register (MCGT)

dco_select

654

210

DMX32

DRST

DRS

Reset:

Figure 8-8. MCG Test and Control Register (MCGT)

Table 8-8. MCG Test and Control Register Field Descriptions

Field

Description

7:6

Reserved for test, user code should not write 1’s to these bits.

DMX32

DCO Maximum frequency with 32.768 kHz reference — The DMX32 bit controls whether or not the DCO

frequency range is narrowed to its maximum frequency with a 32.768 kHz reference. See Table 8-9.

0 DCO has default range of 25%.

1 DCO is ﬁned tuned for maximum frequency with 32.768 kHz reference.

4:1

Reserved for test, user code should not write 1’s to these bits.

DRST

DRS

DCO Range Status — The DRST read bit indicates the current frequency range for the FLL output, DCOOUT.

See Table 8-9. The DRST bit does not update immediately after a write to the DRS ﬁeld due to internal

synchronization between clock domains. The DRST bit is not valid in BLPI, BLPE, PBE or PEE mode and it reads

zero regardless of the DCO range selected by the DRS bit.

DCO Range Select — The DRS bit selects the frequency range for the FLL output, DCOOUT. Writes to the DRS

bit while either the LP or PLLS bit is set are ignored.

0 Low range.

1 Mid range.

Table 8-9. DCO frequency range1

1 The resulting bus clock frequency should not exceed the maximum speciﬁed bus

clock frequency of the device.

DRS

DMX32

Reference range

FLL factor

DCO range

31.25 - 39.0625 kHz

512

16 - 20 MHz

32.768 kHz

608

19.92 MHz

31.25 - 39.0625 kHz

1024

32 - 40 MHz

32.768 kHz

1216

39.85 MHz

MC9S08DZ96F2CLL bảng dữ liệu(PDF) 177 Page - Freescale Semiconductor, Inc

MC9S08DZ96F2CLL bảng dữ liệu(HTML) 177 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

bảng dữ liệu tải về

Link URL