R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 658

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 14 Direct Memory Access Controller (DMAC)
14.4.7
Figures 14.13 to 14.16 show the sample timing of the DREQ input in each bus mode, respectively.
Rev.1.00 Dec. 13, 2005 Page 606 of 1286
REJ09B0158-0100
Figure 14.14 Example of DREQ Input Detection in Cycle Steal Mode Level Detection
Figure 14.13 Example of DREQ Input Detection in Cycle Steal Mode Edge Detection
DREQ Pin Sampling Timing
DACK
(Low-active)
CLKOUT
Bus cycle
DREQ
(Overrun 0,
Low-level)
DRAK
(Low-active)
DACK
(Low-active)
CLKOUT
Bus cycle
DREQ
(Overrun 1,
Low-level)
DRAK
(Low-active)
DREQ
(Falling edge)
DRAK
(Low-active)
DACK
(Low-active)
Bus cycle
CKOUT
1st acceptance
1st acceptance
1st acceptance
: Non-sensitive period
: Non-sensitive period
CPU
CPU
CPU
DMAC
DMAC
DMAC
2nd acceptance
2nd acceptance
Acceptance started
Acceptance
started
2nd acceptance
CPU
CPU
CPU
Acceptance started