HD64F3664H Renesas Electronics America, HD64F3664H Datasheet - Page 240
HD64F3664H
Manufacturer Part Number
HD64F3664H
Description
IC H8 MCU FLASH 32K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.US3664-BAG1.pdf
(446 pages)
Specifications of HD64F3664H
Core Processor
H8/300H
Core Size
16-Bit
Speed
16MHz
Connectivity
I²C, SCI
Peripherals
PWM, WDT
Number Of I /o
29
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Section 14 Serial Communication Interface 3 (SCI3)
14.4
Figure 14.2 shows the general format for asynchronous serial communication. One frame consists
of a start bit (low level), followed by data (in LSB-first order), a parity bit (high or low level), and
finally stop bits (high level). Inside the SCI3, the transmitter and receiver are independent units,
enabling full duplex. Both the transmitter and the receiver also have a double-buffered structure,
so data can be read or written during transmission or reception, enabling continuous data transfer.
14.4.1
Either an internal clock generated by the on-chip baud rate generator or an external clock input at
the SCK3 pin can be selected as the SCI3’s serial clock source, according to the setting of the
COM bit in SMR and the CKE0 and CKE1 bits in SCR3. When an external clock is input at the
SCK3 pin, the clock frequency should be 16 times the bit rate used.
When the SCI3 is operated on an internal clock, the clock can be output from the SCK3 pin. The
frequency of the clock output in this case is equal to the bit rate, and the phase is such that the
rising edge of the clock is in the middle of the transmit data, as shown in figure 14.3.
Rev. 6.00 Mar. 24, 2006 Page 210 of 412
REJ09B0142-0600
Clock
Serial data
Serial
data
Figure 14.3 Relationship between Output Clock and Transfer Data Phase
Operation in Asynchronous Mode
Clock
(Asynchronous Mode) (Example with 8-Bit Data, Parity, Two Stop Bits)
Start
bit
1 bit
Figure 14.2 Data Format in Asynchronous Communication
LSB
0
D0
One unit of transfer data (character or frame)
D1
Transmit/receive data
D2
7 or 8 bits
D3
1 character (frame)
D4
D5
D6
MSB
D7
Parity
bit
1 bit,
or none
0/1
1
Stop bit
1 or
2 bits
1
Mark state
1
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