HCS08 datasheet(209/316 Pages) NXP

209 / 316 page

Serial Communications Interface (S08SCIV4)

MC9S08SG8 MCU Series Data Sheet, Rev. 8

Freescale Semiconductor

209

14.2.5

SCI Status Register 2 (SCIS2)

This register has one read-only status flag.

Framing Error Flag — FE is set at the same time as RDRF when the receiver detects a logic 0 where the stop

bit was expected. This suggests the receiver was not properly aligned to a character frame. To clear FE, read

SCIS1 with FE = 1 and then read the SCI data register (SCID).

0 No framing error detected. This does not guarantee the framing is correct.

1 Framing error.

Parity Error Flag — PF is set at the same time as RDRF when parity is enabled (PE = 1) and the parity bit in

the received character does not agree with the expected parity value. To clear PF, read SCIS1 and then read the

SCI data register (SCID).

0 No parity error.

1 Parity error.

321

LBKDIF

RXEDGIF

RXINV

RWUID

BRK13

LBKDE

RAF

Reset

000

= Unimplemented or Reserved

Figure 14-9. SCI Status Register 2 (SCIS2)

Table 14-6. SCIS2 Field Descriptions

Field

Description

LBKDIF

LIN Break Detect Interrupt Flag — LBKDIF is set when the LIN break detect circuitry is enabled and a LIN break

character is detected. LBKDIF is cleared by writing a “1” to it.

0 No LIN break character has been detected.

1 LIN break character has been detected.

RXEDGIF

RxD Pin Active Edge Interrupt Flag — RXEDGIF is set when an active edge (falling if RXINV = 0, rising if

RXINV=1) on the RxD pin occurs. RXEDGIF is cleared by writing a “1” to it.

0 No active edge on the receive pin has occurred.

1 An active edge on the receive pin has occurred.

RXINV1

Receive Data Inversion — Setting this bit reverses the polarity of the received data input.

0 Receive data not inverted

1 Receive data inverted

RWUID

Receive Wake Up Idle Detect— RWUID controls whether the idle character that wakes up the receiver sets the

IDLE bit.

0 During receive standby state (RWU = 1), the IDLE bit does not get set upon detection of an idle character.

1 During receive standby state (RWU = 1), the IDLE bit gets set upon detection of an idle character.

BRK13

Break Character Generation Length — BRK13 is used to select a longer transmitted break character length.

Detection of a framing error is not affected by the state of this bit.

0 Break character is transmitted with length of 10 bit times (11 if M = 1)

1 Break character is transmitted with length of 13 bit times (14 if M = 1)

Table 14-5. SCIS1 Field Descriptions (continued)

Field

Description

HCS08 bảng dữ liệu(PDF) 209 Page - NXP Semiconductors

HCS08 bảng dữ liệu(HTML) 209 Page - NXP Semiconductors

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

bảng dữ liệu tải về

Link URL