HD64F3644DV Renesas Electronics America, HD64F3644DV Datasheet - Page 347

• Manufacturer Part Number: HD64F3644DV
• Description: IC H8/3644 MCU FLASH 64QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644DV

• 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: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

When clock output mode is selected, SCI3 outputs 8 serial clock pulses. When an external clock is
selected, data is output in synchronization with the input clock.
Serial data is transmitted from the TXD pin in order from the LSB (bit 0) to the MSB (bit 7).
When the MSB (bit 7) is sent, checks bit TDRE. If bit TDRE is cleared to 0, SCI3 transfers data
from TDR to TSR, and starts transmission of the next frame. If bit TDRE is set to 1, SCI3 sets bit
TEND to 1 in SSR, and after sending the MSB (bit 7), retains the MSB state. If bit TEIE in SCR3
is set to 1 at this time, a TEI request is made.
After transmission ends, the SCK
Note: Transmission is not possible if an error flag (OER, FER, or PER) that indicates the data
Figure 10.17 shows an example of the operation when transmitting in synchronous mode.
TDRE
TEND
LSI
operation
User
processing
Serial
clock
Serial
data
Figure 10.17 Example of Operation when Transmitting in Synchronous Mode
reception status is set to 1. Check that these error flags (OER, FER, and PER) are all
cleared to 0 before a transmit operation.
TXI request
Bit 0
Bit 1
TDRE cleared
to 0
Data written
to TDR
1 frame
3
pin is fixed at the high level.
TXI request
Bit 7
Bit 0
Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 325 of 526
Bit 1
1 frame
Bit 6
REJ09B0326-0600
TEI request
Bit 7