MAC7200 datasheet(596/976 Pages) FREESCALE

596 / 976 page

The Generic FlexCAN2 Module

MAC7200 Microcontroller Family Reference Manual, Rev. 2

518

Freescale Semiconductor

Address: Base + $0004

PRESDIV

RJW

PSEG1

PSEG2

Reset

000000000000000

9876543210

LPB

SMP

TSYN LBUF LOM

PROPSEG

Reset

000000000000000

Figure 28-4. Control Register (CTRL)

Table 28-10. CTRL Field Descriptions

Field

Description

31–24

PRESDIV

Prescaler Division Factor. This 8-bit field defines the ratio between the CPI clock frequency and the Serial

Clock (Sclock) frequency. The Sclock period defines the time quantum of the CAN protocol. For the reset

value, the Sclock frequency is equal to the CPI clock frequency. The Maximum value of this register is

$FF, that gives a minimum Sclock frequency equal to the CPI clock frequency divided by 256. For more

information refer to Section 28.2.7.7.4, “Protocol Timing.”

Sclock frequency = CPI clock frequency / (PRESDIV + 1)

23–22

RJW

Resync Jump Width. This 2-bit field defines the maximum number of time quanta1 that a bit time can be

changed by one re-synchronization. The valid programmable values are 0–3.

Resync Jump Width = RJW + 1.

21–19

PSEG1

Phase Segment 1. This 3-bit field defines the length of Phase Buffer Segment 1 in the bit time. The valid

programmable values are 0–7.

Phase Buffer Segment 1 = (PSEG1 + 1) x Time-Quanta.

18–16

PSEG2

Phase Segment 2. This 3-bit field defines the length of Phase Buffer Segment 2 in the bit time. The valid

programmable values are 1–7.

Phase Buffer Segment 2 = (PSEG2 + 1) x Time-Quanta.

BOFF_MSK

Bus Off Mask. This bit provides a mask for the Bus Off Interrupt.

0 Bus Off interrupt disabled

1 Bus Off interrupt enabled

ERR_MSK

Error Mask. This bit provides a mask for the Error Interrupt.

0 Error interrupt disabled

1 Error interrupt enabled

MAC7200 Datasheet(PDF) 596 Page - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 596 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