MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 381

• Manufacturer Part Number: MC9S12Q
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

13.1.4
Figure 13-1
blocks.
13.2
The SCI module has a total of two external pins:
13.2.1
This pin serves as transmit data output of SCI.
13.2.2
This pin serves as receive data input of the SCI.
Freescale Semiconductor
RX DATA IN
BUS CLOCK
External Signal Description
Block Diagram
TXD-SCI Transmit Pin
RXD-SCI Receive Pin
is a high level block diagram of the SCI module, showing the interaction of various functional
GENERATOR
BAUD
RECEIVE & WAKE UP CONTROL
Figure 13-1. SCI Block Diagram
RECEIVE SHIFT REGISTER
TRANSMIT SHIFT REGISTER
SCI DATA REGISTER
16
TRANSMIT CONTROL
SCI DATA REGISTER
Chapter 13 Serial Communications Interface (S12SCIV2) Block Description
MC9S12Q128
Rev 1.09
DATA FORMAT CONTROL
TDRE IRQ
RDR/OR IRQ
TC IRQ
IDLE IRQ
TXDATA OUT
IRQ
TO CPU
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