mc908jl16 Freescale Semiconductor, Inc, mc908jl16 Datasheet - Page 86

• Manufacturer Part Number: mc908jl16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
7.3 Pin Name Conventions
The generic names of the SCI I/O pins are:
The SCI I/O (input/output) lines are dedicated pins for the SCI module.
and the generic names of the SCI I/O pins.
The generic pin names appear in the text of this section.
7.4 Functional Description
Figure 7-2
communication among the MCU and remote devices, including other MCUs. The transmitter and receiver
of the SCI operate independently, although they use the same baud rate generator. During normal
operation, the CPU monitors the status of the SCI, writes the data to be transmitted, and processes
received data. The baud rate clock source for the SCI is the bus clock.
86
$0013
$0014
$0015
$0016
$0017
$0018
$0019
Addr.
•
•
RxD (receive data)
TxD (transmit data)
SCI Baud Rate Register
shows the structure of the SCI module. The SCI allows full-duplex, asynchronous, NRZ serial
Register Name
SCI Control Register 1
SCI Control Register 2
SCI Control Register 3
SCI Status Register 1
SCI Status Register 2
SCI Data Register
1. Position of MMIIC module pins (SDA and SCL) is user selectable using CONFIG2
option bit. Refer to
MOR)
MMIIC is enabled and using PTD7/PTD6 for its pins. For more information on MMIIC,
(see
Generic Pin Names:
(SCDR)
(SCBR)
(SCC1)
(SCC2)
(SCC3)
(SCS1)
(SCS2)
Chapter 8 Multi-Master IIC Interface
Full Pin Names:
for additional information. SDA/SCL have priority over the RxD/TxD when
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
Write:
Write:
Figure 7-1. SCI I/O Register Summary
Chapter 3 Configuration and Mask Option Registers (CONFIG and
Table 7-1. Pin Name Conventions
LOOPS
SCTIE
SCTE
Bit 7
MC68HC908JL16 Data Sheet, Rev. 1.1
R8
R7
T7
U
0
0
1
0
0
0
= Unimplemented
ENSCI
TCIE
TC
R6
T8
T6
U
6
0
0
1
0
0
0
PTD7/RxD/SDA
DMARE
(MMIIC)).
SCRIE
TXINV
SCRF
SCP1
RxD
R5
T5
5
0
0
0
0
0
0
R = Reserved
DMATE
(1)
Unaffected by reset
SCP0
IDLE
ILIE
R4
T4
M
4
0
0
0
0
0
0
WAKE
PTD6/TxD/SCL
ORIE
Table 7-1
OR
TE
R3
T3
R
3
0
0
0
0
0
0
TxD
U = Unaffected
SCR2
NEIE
ILTY
RE
NF
R2
T2
2
0
0
0
0
0
0
shows the full names
Freescale Semiconductor
(1)
SCR1
RWU
FEIE
PEN
BKF
FE
R1
T1
1
0
0
0
0
0
0
SCR0
PEIE
Bit 0
PTY
SBK
RPF
PE
R0
T0
0
0
0
0
0
0