HD6417727F160V Renesas Electronics America, HD6417727F160V Datasheet - Page 437

• Manufacturer Part Number: HD6417727F160V
• Description: MPU 3V 16K PB-FREE 240-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F160V

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 160MHz
• Connectivity: FIFO, SCI, SIO, SmartCard, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 104
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.7 V ~ 2.05 V
• Data Converters: A/D 6x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 240-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

14.1
This chip includes a four-channel direct memory access controller (DMAC). The DMAC can be
used in place of the CPU to perform high-speed transfers between external devices that have
DACK (transfer request acknowledge signal), external memory, memory-mapped external
devices, and on-chip supporting modules (SIOF, SCIF, USBF, A/D converter, and D/A converter).
Using the DMAC reduces the burden on the CPU and increases overall operating efficiency.
14.1.1
The DMAC has the following features.
• Four channels
• 4-GB physical address space
• Selectable data transfer length: 8-bit, 16-bit, 32-bit, or 16-byte transfer (In 16-byte transfer,
• Maximum of 16 M times of transfers (16777216 times)
• Address mode: Dual address mode and single address mode are supported. In addition, direct
• Channel functions: Transfer mode that can be specified is different in each channel.
four 32-bit reads are executed, followed by four 32-bit writes.)
address transfer mode or indirect address transfer mode can be selected.
⎯ Dual address mode transfer: Both the transfer source and transfer destination are accessed
⎯ Single address mode transfer: Either the transfer source or transfer destination peripheral
⎯ Channel 0: Can accept requests from peripheral modules and external requests.
⎯ Channel 1: Can accept requests from peripheral modules.
⎯ Channel 2: Can accept requests from peripheral modules. This channel has a source address
Section 14 Direct Memory Access Controller (DMAC)
by address. Dual address mode has direct address transfer mode and indirect address
transfer mode.
Direct address transfer mode: The values specified in the DMAC registers indicates the
transfer source and transfer destination. Two bus cycles are required for one data transfer.
Indirect address transfer mode: Data is transferred with the address stored prior to the
address specified in the transfer source address in the DMAC. Other operations are the
same as those of direct address transfer mode. This function is only valid in channel 3.
Four bus cycles are requested for one data transfer.
device is accessed (selected) by means of the DACK signal, and the other device is
accessed by address. One transfer unit of data is transferred in one bus cycle.
reload function, which reloads a source address for each 4 transfers.
Overview
Features
Section 14 Direct Memory Access Controller (DMAC)
Rev.6.00 Mar. 27, 2009 Page 379 of 1036
REJ09B0254-0600