mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 386
![no-image](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_sml.jpg)
mc9s12q128
Manufacturer Part Number
mc9s12q128
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12Q128.pdf
(644 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12Q128
Manufacturer:
FREESCALE
Quantity:
4 000
Company:
Part Number:
mc9s12q128CFU
Manufacturer:
FREESCALE
Quantity:
5
Company:
Part Number:
mc9s12q128CPBE16
Manufacturer:
FREESCAL
Quantity:
372
Company:
Part Number:
mc9s12q128MFUE16
Manufacturer:
MOTOROLA
Quantity:
591
Part Number:
mc9s12q128MFUE16
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
mc9s12q128VFU16
Manufacturer:
FREESCALE
Quantity:
1 831
- Current page: 386 of 644
- Download datasheet (4Mb)
Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
13.3.2.4
The SCISR1 and SCISR2 registers provides inputs to the MCU for generation of SCI interrupts. Also,
these registers can be polled by the MCU to check the status of these bits. The flag-clearing procedures
require that the status register be read followed by a read or write to the SCI Data Register.It is permissible
to execute other instructions between the two steps as long as it does not compromise the handling of I/O,
but the order of operations is important for flag clearing.
Read: Anytime
Write: Has no meaning or effect
386
Module Base + 0x_0004
Reset
TDRE
Field
RWU
Field
SBK
TC
1
0
7
6
W
R
TDRE
Receiver Wakeup Bit — Standby state
0 Normal operation.
1 RWU enables the wakeup function and inhibits further receiver interrupt requests. Normally, hardware wakes
Send Break Bit — Toggling SBK sends one break character (10 or 11 logic 0s, respectively 13 or 14 logics 0s
if BRK13 is set). Toggling implies clearing the SBK bit before the break character has finished transmitting. As
long as SBK is set, the transmitter continues to send complete break characters (10 or 11 bits, respectively 13
or 14 bits).
0 No break characters
1 Transmit break characters
Transmit Data Register Empty Flag — TDRE is set when the transmit shift register receives a byte from the
SCI data register. When TDRE is 1, the transmit data register (SCIDRH/L) is empty and can receive a new value
to transmit.Clear TDRE by reading SCI status register 1 (SCISR1), with TDRE set and then writing to SCI data
register low (SCIDRL).
0 No byte transferred to transmit shift register
1 Byte transferred to transmit shift register; transmit data register empty
Transmit Complete Flag — TC is set low when there is a transmission in progress or when a preamble or break
character is loaded. TC is set high when the TDRE flag is set and no data, preamble, or break character is being
transmitted.When TC is set, the TXD out signal becomes idle (logic 1). Clear TC by reading SCI status register
1 (SCISR1) with TC set and then writing to SCI data register low (SCIDRL). TC is cleared automatically when
data, preamble, or break is queued and ready to be sent. TC is cleared in the event of a simultaneous set and
clear of the TC flag (transmission not complete).
0 Transmission in progress
1 No transmission in progress
SCI Status Register 1 (SCISR1)
0
7
the receiver by automatically clearing RWU.
= Unimplemented or Reserved
TC
0
6
Table 13-4. SCICR2 Field Descriptions (continued)
Figure 13-6. SCI Status Register 1 (SCISR1)
Table 13-5. SCISR1 Field Descriptions
RDRF
0
5
MC9S12Q128
IDLE
Rev 1.09
0
4
Description
Description
OR
0
3
NF
0
2
Freescale Semiconductor
FE
0
1
PF
0
0
Related parts for mc9s12q128
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MC9S12Q](/images/no-image3.png)
Part Number:
Description:
Microcontrollers
Manufacturer:
FREESCALE [Freescale Semiconductor, Inc]
Datasheet:
![MC14560BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC12034AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MPIC2112P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14520BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC12026AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC145152P2](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC68HC11A0P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MCM6726DWJ10](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC44355](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC13282AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14519BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14495P1](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![SN74LS796N](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC142100CP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: