mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 232
mc9s12ne64
Manufacturer Part Number
mc9s12ne64
Description
Hcs12 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12NE64.pdf
(554 pages)
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Chapter 8 Serial Communication Interface (SCIV3)
8.2
The SCI module has a total of two external pins.
8.2.1
The TXD pin transmits SCI (standard or infrared) data. It will idle high in either mode and is high
impedance anytime the transmitter is disabled.
8.2.2
The RXD pin receives SCI (standard or infrared) data. An idle line is detected as a line high. This input is
ignored when the receiver is disabled and should be terminated to a known voltage.
8.3
This subsection provides a detailed description of all the SCI registers.
8.3.1
The memory map for the SCI module is given in
address offset. The total address for each register is the sum of the base address for the SCI module and
the address offset for each register.
8.3.2
This subsection consists of register descriptions in address order. Each description includes a standard
register diagram with an associated figure number. Writes to reserved register locations do not have any
effect and reads of these locations return a 0. Details of register bit and field function follow the register
diagrams, in bit order.
232
Register
SCIBDH
SCIBDL
SCICR1
Name
External Signal Descriptions
Memory Map and Register Definition
TXD — SCI Transmit Pin
RXD — SCI Receive Pin
Module Memory Map
Register Descriptions
W
W
W
R
R
R
LOOPS
SBR7
IREN
Bit 7
SCISWAI
= Unimplemented or Reserved
Figure 8-2. SCI Registers Summary
SBR6
TNP1
6
MC9S12NE64 Data Sheet, Rev. 1.1
RSRC
TNP0
SBR5
5
Figure
SBR12
SBR4
M
4
8-2. The address listed for each register is the
SBR11
WAKE
SBR3
3
SBR10
SBR2
ILT
2
Freescale Semiconductor
SBR9
SBR1
PE
1
SBR8
SBR0
Bit 0
PT
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