HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 153
![MCU 5V 256K J-TEMP PB-FREE QFP-1](/photos/28/62/286212/168-bqfp_sml.jpg)
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: 153 of 843
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Section 8 Bus State Controller (BSC)
8.5
Bus Arbitration
The SH7050 series has a bus arbitration function that, when a bus release request is received from
an external device, releases the bus to that device. It also has two internal bus masters, the CPU
and the DMAC, DTC. The priority ranking for determining bus right transfer between these bus
masters is:
Bus right request from external device > DMAC > CPU
Therefore, an external device that generates a bus request is given priority even if the request is
made during a DMAC burst transfer.
A bus request by an external device should be input at the BREQ pin. The signal indicating that
the bus has been released is output from the BACK pin.
Figure 8.9 shows the bus right release procedure.
SH7050 series
External device
BREQ = Low
BREQ accepted
Bus right request
Strobe pin:
high-level output
Address, data,
BACK confirmation
strobe pin:
high impedance
BACK = Low
Bus right release
response
Bus right release status
Bus right acquisition
Figure 8.9 Bus Right Release Procedure
Rev. 5.00 Jan 06, 2006 page 131 of 818
REJ09B0273-0500
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