CM68HC05C4ACFB Motorola / Freescale Semiconductor, CM68HC05C4ACFB Datasheet - Page 66

• Manufacturer Part Number: CM68HC05C4ACFB
• Description: Microcontroller
• Manufacturer: Motorola / Freescale Semiconductor

Serial Communications Interface (SCI)
General Release Specification
66
BAUD RATE
CLOCK
SCI CONTROL REGISTER 2 (SCCR2)
SCI CONTROL REGISTER 1 (SCCR1)
INTERNAL DATA BUS
1X
SCI STATUS REGISTER (SCSR)
BAUD RATE REGISTER (BAUD)
SCI DATA REGISTER (SCDR)
When the shift register is not transmitting a character, the PD1/TDO pin
goes to the idle condition, logic 1. If software clears the TE bit during the
idle condition, and while TDRE is set, the transmitter relinquishes control
of the PD1/TDO pin.
T8
M
Serial Communications Interface (SCI)
Figure 9-2. SCI Transmitter
H
TRANSMIT SHIFT REGISTER
8
TDRE
BIT 7
BIT 7
TIE
R8
7 6 5 4 3 2 1 0
0
CONTROL LOGIC
SCDR ($0011)
TRANSMITTER
BIT 6
TCIE
TC
T8
6
0
RDRF
SCP1
BIT 5
RIE
5
0
TDRE
TCIE
TIE
TC
SCP0
IDLR
BIT 4
ILIE
M
L
4
SBK
TE
WAKE
REQUESTS
BIT 3
OR
TE
RECEIVE
3
0
SCI
SCR2
AND CONTROL
BIT 2
RE
NF
PIN BUFFER
2
0
SCR1
RWU
BIT 1
FE
1
0
MC68HC05C4A
SCR0
BIT 0
BIT 0
SBK
0
0
INTERRUPT
REQUEST
PD1/
TDO
$000D
$000E
$000F
$0010
$0011
SCI
MOTOROLA
—
Rev. 4.0