HD64F3687GH Renesas Electronics America, HD64F3687GH Datasheet - Page 310
HD64F3687GH
Manufacturer Part Number
HD64F3687GH
Description
IC H8 MCU FLASH 56K 64-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.HD64F3684GFPV.pdf
(538 pages)
Specifications of HD64F3687GH
Core Processor
H8/300H
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
45
Program Memory Size
56KB (56K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
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 16 Serial Communication Interface 3 (SCI3)
16.4
Figure 16.2 shows the general format for asynchronous serial communication. One character (or
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.
16.4.1
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, 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 16.3.
Rev.5.00 Nov. 02, 2005 Page 276 of 500
REJ09B0027-0500
Clock
Serial data
Serial
data
Figure 16.3 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 16.2 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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