HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 188
HD6477021X20V
Manufacturer Part Number
HD6477021X20V
Description
MCU 5V 32K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6477021X20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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9.1
The SuperH microprocomputer 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, on-chip memory and on-chip peripheral modules (excluding
the DMAC itself). Using the DMAC reduces the burden on the CPU and increases overall
operating efficiency.
9.1.1
The DMAC has the following features.
•
•
•
•
•
•
Four channels
Four Gbytes of address space on the architecture
Byte or word selectable data transfer unit
65536 transfers (maximum)
Single address mode transfers (channels 0 and 1): Either the transfer source or transfer
destination (peripheral device) is accessed by a DACK signal (selectable) while the other is
accessed by address. 1 transfer unit of data is transferred in each bus cycle.
Device combinations able to transfer:
Dual address mode transfer: (channels 0–3): Both the transfer source and transfer destination
are accessed by address. 1 transfer unit of data is transferred in 2 bus cycles.
Device combinations able to transfer:
Section 9 Direct Memory Access Controller (DMAC)
External devices with DACK and memory-mapped external devices (including external
External devices with DACK and memory-mapped external memories
Two external memories
External memory and memory-mapped external devices
Two memory-mapped devices
External memory and on-chip memory
Memory-mapped external devices and on-chip peripheral module (excluding the DMAC
External memory and on-chip memory
Memory-mapped external device and on-chip peripheral module (excluding the DMAC)
Two on-chip memories
On-chip memory and on-chip peripheral modules (excluding DMAC)
memories)
itself)
Overview
Features
RENESAS 169
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