HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 410

• Manufacturer Part Number: HD6477021X20V
• Description: MCU 5V 32K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6477021X20V

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Note:
In switching from transmitting or receiving to simultaneous transmitting and receiving,
clear both TE and RE to 0, then set both TE and RE to 1.
Figure 13.20 Sample Flowchart for Serial Transmitting
No
No
No
Start transmitting and receiving
Read the ORER bit of the SSR
RDR and clear the RDRF bit of
Write transmit data to the TDR
Read the receive data of the
and clear the TDRE bit of the
Transmitting/receiving ends
Clear the TE and RE bits of
Read TDRE bit of the SSR
Read the SSR's RDRF bit
count transmitted and
the SSR to 0
the SCR to 0
ORER = 1?
RDRF = 1?
TDRE = 1?
Initialization
received?
SSR to 0
Total
Yes
No
Yes
Yes
Yes
Error handling
(1)
(2)
(4)
(5)
(3)
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