HD6417750RF240DV Renesas Electronics America, HD6417750RF240DV Datasheet - Page 772

• Manufacturer Part Number: HD6417750RF240DV
• Description: MPU 3V 16K I-TEMP,PB-FREE 208-QF
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417750RF240DV

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 28
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 15 Serial Communication Interface (SCI)
Table 15.9 SCSMR1 and SCSCR1 Settings for SCI Clock Source Selection
SCSMR1
Bit 7:
C/A
0
1
15.3.2
In asynchronous mode, characters are sent or received, each preceded by a start bit indicating the
start of communication and followed by one or two stop bits indicating the end of communication.
Serial communication is thus carried out with synchronization established on a character-by-
character basis.
Inside the SCI, the transmitter and receiver are independent units, enabling full-duplex
communication. Both the transmitter and the receiver also have a double-buffered structure, so
that data can be read or written during transmission or reception, enabling continuous data
transfer.
Figure 15.5 shows the general format for asynchronous serial communication.
In asynchronous serial communication, the transmission line is usually held in the mark state (high
level). The SCI monitors the transmission line, and when it goes to the space state (low level),
recognizes a start bit and starts serial communication.
One serial communication character consists of a start bit (low level), followed by data (in LSB-
first order), a parity bit (high or low level), and finally one or two stop bits (high level).
Rev.7.00 Oct. 10, 2008 Page 686 of 1074
REJ09B0366-0700
Operation in Asynchronous Mode
Bit 1:
CKE1
0
1
0
1
SCSCR1 Setting
Bit 0:
CKE0
0
1
0
1
0
1
0
1
Mode
Asynchronous
mode
Synchronous
mode
Clock
Source
External
Internal
External
Internal
SCI Transmit/Receive Clock
SCK Pin Function
SCI does not use SCK pin
Outputs clock with same
frequency as bit rate
Inputs clock with frequency of
16 times the bit rate
Outputs serial clock
Inputs serial clock