HD64F3644H Renesas Electronics America, HD64F3644H Datasheet - Page 350

• Manufacturer Part Number: HD64F3644H
• Description: IC H8 MCU FLASH 32K 64-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644H

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-QFP
• Package: 64PQFP
• Family Name: H8
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 45
• Interface Type: SCI
• On-chip Adc: 8-chx8-bit
• Number Of Timers: 4
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 10 Serial Communication Interface
Simultaneous Transmit/Receive: Figure 10.20 shows an example of a flowchart for a
simultaneous transmit/receive operation. This procedure should be followed for simultaneous
transmission/reception after initializing SCI3.
Rev. 6.00 Sep 12, 2006 page 328 of 526
REJ09B0326-0600
Figure 10.20 Example of Simultaneous Data Transmission/Reception Flowchart
3
1
2
transmission/reception?
Read receive data
Clear bits TE and
Read bit TDRE
Read bit RDRF
RE to 0 in SCR
Write transmit
Continue data
Read bit OER
data to TDR
RDRF = 1?
TDRE = 1?
OER = 1?
in SSR
in RDR
in SSR
in SSR
Start
End
Yes
No
Yes
No
4
Yes
No
No
Yes
Overrun error
processing
(Synchronous Mode)
1.
2.
3.
4.
Read the serial status register (SSR) and
check that bit TDRE is set to 1, then write
transmit data to the transmit data register
(TDR). When data is written to TDR, bit
TDRE is cleared to 0 automatically.
Read SSR and check that bit RDRF is set
to 1. If it is, read the receive data in RDR.
When the RDR data is read, bit RDRF is
cleared to 0 automatically.
When continuing data transmission/reception,
finish reading of bit RDRF and RDR before
receiving the MSB (bit 7) of the current frame.
Before transmitting the MSB (bit 7) of the current
frame, also read TDRE = 1 to confirm that a
write can be performed, then write data to TDR.
When data is written to TDR, bit TDRE is cleared
to 0 automatically, and when the data in RDR is
read, bit RDRF is cleared to 0 automatically.
If an overrun error has occurred, read bit OER
in SSR, and after carrying out the necessary
error processing, clear bit OER to 0. Transmission
and reception cannot be resumed if bit OER is
set to 1. See figure 10.18 for details on overrun
error processing.