MAC7200 datasheet(777/976 Pages) FREESCALE

777 / 976 page

Functional Description

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

699

32.13 Functional Description

The eMIOS provides independent channels (UC) that can be configured and accessed by a host MCU. On

the MAC72xx, two time bases can be shared by the channels through two counter buses and each Unified

Channel can generate its own time base.

The eMIOS block is reset at positive edge of the clock (synchronous reset). All registers are cleared on

reset.

32.13.1 Unified Channel (UC)

Figure 32-13 shows the Unified Channel block diagram. Each Unified Channel consists of:

•

Counter bus selector, which selects the time base to be used by the channel for all timing functions

•

A programmable clock prescaler

•

Two double buffered data registers A and B that allow up to two input capture and/or output

compare events to occur before software intervention is needed.

•

Two comparators (equal only) A and B, which compares the selected counter bus with the value in

the data registers

•

Internal counter, which can be used as a local time base or to count input events

•

Programmable input filter, which ensures that only valid pin transitions are received by channel

•

Programmable input edge detector, which detects the rising, falling or either edges

•

An output flip-flop, which holds the logic level to be applied to the output pin

•

eMIOS Status and Control register

•

An Output Disable Input selector, which selects the Output Disable Input signal that will be used

as output disable

•

Control state machine (FSM)

Address UCn base address + 0x14

000

Reset:

000

876

543

210

ALTA[15:0]

Reset:

000

= Unimplemented or Reserved

Figure 32-12. eMIOS Alternate A register (ALTAn)

MAC7200 Datasheet(PDF) 777 Page - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 777 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