MAC7200 datasheet(728/976 Pages) FREESCALE

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Functional Description

MAC7200 Microcontroller Family Reference Manual, Rev. 2

650

Freescale Semiconductor

Figure 31-21. eSCI Block Diagram

31.10.2 Data Format

The eSCI uses the standard NRZ mark/space data format illustrated in Figure 31-22 below.

Figure 31-22. SCI Data Formats

Each data character is contained in a frame that includes a start bit, eight or nine data bits, and a stop bit.

Clearing the M bit in SCI control register 1 configures the eSCI for 8-bit data characters.A frame with eight

data bits has a total of 10 bits. Setting the M bit configures the eSCI for nine-bit data characters. A frame

with nine data bits has a total of 11 bits.

SCI DATA

RECEIVE

SHIFT REGISTER

SCI DATA

TRANSMIT

SHIFT REGISTER

BAUD RATE

GENERATOR

SBR12–SBR0

BUS

TRANSMIT

CONTROL

÷16

RECEIVE

AND WAKEUP

DATA FORMAT

CONTROL

RDRF

IDLE

TIE

TCIE

TDRE

RAF

LOOPS

RWU

ILT

WAKE

CLOCK

ILIE

RIE

RXD

RSRC

SBK

LOOPS

RSRC

TXD

IRQ

TO CPU

BIT 5

START

BIT

BIT 0

BIT 1

STOP

BIT

START

BIT

9-BIT DATA FORMAT

BIT 2

BIT 3

BIT 4

BIT 6

BIT 7

PARITY

OR DATA

BIT

PARITY

OR DATA

BIT

BIT M IN SCICR1 SET

8-BIT DATA FORMAT

BIT M IN SCICR1 CLEAR

BIT 5

BIT 0

BIT 1

BIT 2

BIT 3

BIT 4

BIT 6

BIT 7

BIT 8

STOP

BIT

START

BIT

START

BIT

MAC7200 Datasheet(PDF) 728 Page - Freescale Semiconductor, Inc

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