MC908MR16CFUE Datasheet, PDF(164/282 Page) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

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MC908MR16CFUE Datasheet, PDF (164/282 Pages) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

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Serial Communications Interface Module (SCI)

INTERNAL BUS

SCP1

SCP0

Ã·4

fOP

PRE- BAUD

SCALER DIVIDER

SCR2

SCR1

SCR0

Ã· 16

PTF4/RxD

DATA

RECOVERY

ALL 0s

BKF

RPF

SCI DATA REGISTER

11-BIT

RECEIVE SHIFT REGISTER

H876543210L

M

WAKE

ILTY

PEN

PTY

WAKEUP

LOGIC

PARITY

CHECKING

IDLE

ILIE

SCRF

SCRIE

SCRF

RWU

IDLE

R8

ILIE

SCRIE

OR

ORIE

NF

NEIE

FE

FEIE

PE

PEIE

OR

ORIE

NF

NEIE

FE

FEIE

PE

PEIE

Figure 13-6. SCI Receiver Block Diagram

13.3.3.1 Character Length

The receiver can accommodate either 8-bit or 9-bit data. The state of the M bit in SCI control register 1

(SCC1) determines character length. When receiving 9-bit data, bit R8 in SCI control register 2 (SCC2)

is the ninth bit (bit 8). When receiving 8-bit data, bit R8 is a copy of the eighth bit (bit 7).

MC68HC908MR32 â¢ MC68HC908MR16 Data Sheet, Rev. 6.1

164

Freescale Semiconductor

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