HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 201
HD64F7051SFJ20V
Manufacturer Part Number
HD64F7051SFJ20V
Description
MCU 5V 256K J-TEMP PB-FREE QFP-1
Manufacturer
Renesas Electronics America
Series
SuperH® SH7050r
Datasheet
1.HD64F7050SFJ20V.pdf
(843 pages)
Specifications of HD64F7051SFJ20V
Core Processor
SH-2
Core Size
32-Bit
Speed
20MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, WDT
Number Of I /o
102
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
10K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
168-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F7051SFJ20V
Manufacturer:
RENESAS
Quantity:
101
Part Number:
HD64F7051SFJ20V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 201 of 843
- Download datasheet (5Mb)
Section 9 Direct Memory Access Controller (DMAC)
Burst Mode, Single Address, and Level Detection: DREQ sampling timing in burst mode with
single address and level detection is shown in figures 9.21 and 9.22.
In burst mode with single address and level detection, a dummy cycle is inserted as one bus cycle,
at the earliest, three cycles after timing of the first sampling. Data during this period is undefined,
and the DACK signal is not output. Nor is the number of DMAC transfers counted. The actual
DMAC transfer begins after one dummy bus cycle output.
The dummy cycle is not counted either at the start of the second sampling (transfer one bus cycle
before the start of the first DMAC transfer). Therefore, the second sampling is not conducted from
the bus cycle starting the dummy cycle, but from the start of the CPU(3) bus cycle.
Thereafter, as long the DREQ is continuously sampled, no dummy cycle is inserted. DREQ
sampling timing during this period begins from the start of the transfer one bus cycle before the
start of DMAC transfer, in the same way as with cycle steal mode.
As with the four samplings in figure 9.21, once DMAC transfer is interrupted, a dummy cycle is
again inserted at the start as soon as DMAC transfer is resumed.
The DACK output period in burst mode is the same as in cycle steal mode.
Rev. 5.00 Jan 06, 2006 page 179 of 818
REJ09B0273-0500
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