Bosch PPP6 B8 Series Manual de Serviço descarregar pdf (Página 274)

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101

Multiple Serial Interface

Technical Data MC68HC912D60A — Rev. 3.1

274 Multiple Serial Interface Freescale Semiconductor

PF — Parity Error Flag

Indicates if received data’s parity matches parity bit. This feature is

active only when parity is enabled. The type of parity tested for is

determined by the PT (parity type) bit in SCxCR1.

0 = Parity correct

1 = Incorrect parity detected

Read anytime. Write has no meaning or effect.

SCSWAI — Serial Communications Interface Stop in WAIT Mode

0 = SCI clock operates normally.

1 = Halt SCI clock generation when in WAIT mode.

RAF — Receiver Active Flag

This bit is controlled by the receiver front end. It is set during the RT1

time period of the start bit search. It is cleared when an idle state is

detected or when the receiver circuitry detects a false start bit

(generally due to noise or baud rate mismatch).

0 = A character is not being received

1 = A character is being received

If enabled with RIE = 1, RAF set generates an interrupt when

VDDPLL is high.

Bit 7654321Bit 0

SCSWAI

MIE

(1)

MDL1

(1)

MDL0

(1)

000RAF

RESET:00000000

SC0SR2 — SCI Status Register 2 $00C5/$00CD

1. See Freescale Interconnect Bus for descriptions of these bits.

1 2 ... 269 270 271 272 273 274 275 276 277 278 279 ... 459 460

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