HD6417020SVX12IV Renesas Electronics America, HD6417020SVX12IV Datasheet - Page 179
HD6417020SVX12IV
Manufacturer Part Number
HD6417020SVX12IV
Description
MCU 3/5V 0K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6417020SVX12IV
Core Processor
SH-1
Core Size
32-Bit
Speed
12.5MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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HD6417020SVX12IV
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8.10.2
1. BACK Operation
Note: * For details see section 8.11.3, Maximum Number of States from BREQ Input to Bus Release.
BREQ
BACK
BREQ
When an internal refresh is requested during an attempt to assert the BACK signal and BACK
is not asserted but remains high, a momentary narrow pulse-shaped spike may be output, as
shown below.
BREQ
BACK
BACK
BACK Operation
Figure 8.37 BACK Operation in Response to Refresh Request (2)
Refresh request
Figure 8.36 BACK Operation by Refresh Demand (1)
If BACK has not gone low after waiting for the maximum
number of states* before the SuperH releases the bus, return
BREQ to the high level.
Refresh demand
BACK does not go low.
Refresh damand
pulse width of the spike is approx. 2 to 5 ns.
Refresh execution
RENESAS 159
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