MC68HC705C9ACFN Freescale Semiconductor, MC68HC705C9ACFN Datasheet - Page 60

• Manufacturer Part Number: MC68HC705C9ACFN
• Description: IC MCU 2.1MHZ 16K OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C9ACFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: OTP
• Ram Size: 352 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Serial Communications Interface (SCI)
9.4 SCI Transmitter Features
Features of the SCI transmitter include:
60
•
•
•
TDO
PIN
Transmit data register empty flag
Transmit complete flag
Send break
$0011
The serial communications data register (SCI SCDR) is controlled by the
internal R/W signal. It is the transmit data register when written to and the
receive data register when read.
DATA SHIFT
REGISTER
REGISTER
TRANSMIT
TRANSMIT
Figure 9-1. Serial Communications Interface Block Diagram
DATA
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
TRANSMITTER
TE
TRDE
INTERNAL BUS
CONTROL
R8
7
7
SBK
TC
T8
6
6
&
RDRF
5
5
+
CONTROL
&
FLAG
IDLE
M
4
4
+
7
SCI INTERRUPT
NOTE
WAKE
OR
&
3
3
NF
2
2
RECEIVER
CONTROL
&
FE
SCSR
$0010
1
1
RECEIVER
CLOCK
0
SCCR1
$000E
SCCR2
$000F
WAKEUP
RWU
TCIE
SBK
RIE
ILIE
TIE
TE
RE
UNIT
$0011
7
6
5
4
3
2
1
0
DATA SHIFT
REGISTER
REGISTER
RECEIVE
RECEIVE
Freescale Semiconductor
DATA
RDI
PIN