HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 218

• 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: Illustrates the case when DACK is output during the DMAC Read cycle.
Figure 9.13 to 9.22 show the sampling timing of the pin DREQ in the cycle steal mode for
each bus cycle. When no DREQ input is detected at the sampling after the aforementioned
DREQ detection, the next sampling occurs in the next stage in which a DACK signal is output.
If no DREQ input is detected at this time, sampling occurs at every state thereafter.
Figure 9.13 DREQ Sampling Timing in Cycle Steal Mode (Output with DREQ level
Figure 9.14 DREQ Sampling Timing in Cycle Steal Mode (Output with DREQ level
Bus cycle
Bus cycle
DREQ
DREQ
DACK
DACK
detection and DACK active low) (Single address mode, bus cycle = 1 state)
detection and DACK active low) (Dual address mode, bus cycle = 1 state)
CK
CK
CPU
CPU
CPU
CPU
CPU
CPU
DMAC (R) DMAC (W)
DMAC
CPU
DMAC (W): DMAC write cycle
DMAC (R): DMAC read cycle
CPU
CPU
CPU
CPU
RENESAS 199
CPU
CPU