HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 487

• Manufacturer Part Number: HD6417720BP133BV
• Description: SH3-DSP, WITH USB AND LCDC, PB-F
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417720BP133BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 117
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

SH7720 Group, SH7721 Group
Choose to detect DREQ by either the edge or level of the signal input with the DL bit and DS bit
in CHCR_0 and CHCR_1 as shown in table 10.4. The source of the transfer request does not have
to be the data transfer source or destination.
Table 10.4 Selecting External Request Detection with DL, DS Bits
When DREQ is accepted, the DREQ pin becomes request accept disabled state. After issuing
acknowledge signal DACK for the accepted DREQ, the DREQ pin again becomes request accept
enabled state.
When DREQ is used by level detection, there are following two cases by the timing to detect the
next DREQ after outputting DACK.
• Overrun 0: Transfer is aborted after the same number of transfer has been performed as
• Overrun 1: Transfer is aborted after transfers have been performed for (the number of requests
The DO bit in CHCR selects this overrun 0 or overrun 1.
Table 10.5 Selecting External Request Detection with DO Bit
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010
DL
0
1
CHCR_0 or CHCR_1
DO
0
1
requests.
plus 1) times.
CHCR_0 or CHCR_1
DS
0
1
0
1
External Request
Overrun 0
Overrun 1
Detection of External Request
Low level detection
Falling edge detection
High level detection
Rising edge detection
Section 10 Direct Memory Access Controller (DMAC)
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