HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 230

• 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: -

8. When the following operations are performed in the order shown when the pin to which DREQ
input is assigned is designated as a general input pin by the pin function controller (PFC) and
inputs a low-level signal, the DREQ falling edge is detected, and a DMA transfer request
accepted, immediately after the setting in (b) is performed:
(a) A channel control register (CHCRn) setting is made so that an interrupt is detected at the
(b) The function of the pin to which DREQ input is assigned is switched from general input to
Therefore, when switching the pin function from general input pin to DREQ input, the pin
function controller (PFC) setting should be changed to DREQ input while the pin to which
DREQ input is assigned is high.
falling edge of DREQ.
DREQ input by a pin function controller (PFC) setting.
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