HD6473837H Renesas Electronics America, HD6473837H Datasheet - Page 289

• Manufacturer Part Number: HD6473837H
• Description: IC H8 MCU OTP 60K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD6473837H

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: SCI
• Peripherals: LCD, PWM
• Number Of I /o: 84
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Clock
The clock source is determined by bit COM in SMR and bits CKE1 and CKE0 in serial control
register 3 (SCR3). See table 10.14 for the settings. Either an internal clock source can be used to
run the built-in baud rate generator, or an external clock source can be input at pin SCK
When an external clock is input at pin SCK
rate.
When an internal clock source is used, SCK
the same frequency as the serial bit rate, and is synchronized as in figure 10.10 so that the rising
edge of the clock occurs in the center of each bit of transmit/receive data.
Data Transmit/Receive Operations
SCI3 Initialization: Before data is sent or received, bits TE and RE in serial control register 3
(SCR3) must be cleared to 0, after which initialization can be performed using the procedure
shown in figure 10.11.
Note: When modifying the operation mode, transfer format or other settings, always be sure to
272
Clock
Serial
data
Figure 10.10 Phase Relation of Output Clock and Communication Data in Asynchronous
clear bits TE and RE first. When TE is cleared to 0, bit TDRE will be set to 1. Clearing
RE does not clear the status flags RDRF, PER, FER, or OER, or alter the contents of the
receive data register (RDR).
When an external clock is used in asynchronous mode, do not stop the clock during
operation, including during initialization. When an external clock is used in synchronous
mode, do not supply the clock during initialization.
0
Mode (8-Bit Data, Parity Bit Added, and 2 Stop Bits)
D0
D1
D2
1 character (1 frame)
D3
3
3
, it should have a frequency 16 times the desired bit
is used as the clock output pin. The clock output has
D4
D5
D6
D7
0/1
1
1
3
.