HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 490
HD6417751RF240V
Manufacturer Part Number
HD6417751RF240V
Description
MPU 1.5/3.3V 0K PB-FREE 256-QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417751RBP200DV.pdf
(1226 pages)
Specifications of HD6417751RF240V
Core Processor
SH-4
Core Size
32-Bit
Speed
240MHz
Connectivity
EBI/EMI, FIFO, SCI, SmartCard
Peripherals
DMA, POR, WDT
Number Of I /o
39
Program Memory Type
ROMless
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
256-QFP Exposed Pad, 256-eQFP, 256-HQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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Quantity
Price
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Part Number:
HD6417751RF240V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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13. Bus State Controller (BSC)
Bit 2—Refresh Count Overflow Flag (OVF): Status flag that indicates that the number of
refresh requests indicated by the refresh count register (RFCR) has exceeded the number specified
by the LMTS bit in RTCSR.
Bit 2: OVF
0
1
Note:
Bit 1—Refresh Count Overflow Interrupt Enable (OVIE): Controls generation or suppression
of an interrupt request when the OVF flag is set to 1 in RTCSR.
Bit 1: OVIE
0
1
Bit 0—Refresh Count Overflow Limit Select (LMTS): Specifies the count limit to be compared
with the refresh count indicated by the refresh count register (RFCR). If the RFCR register value
exceeds the value specified by LMTS, the OVF flag is set.
Bit 0: LMTS
0
1
13.2.12 Refresh Timer Counter (RTCNT)
The refresh timer counter (RTCNT) is an 8-bit readable/writable counter that is incremented by
the input clock (selected by bits CKS2–CKS0 in the RTCSR register). When the RTCNT counter
value matches the RTCOR register value, the CMF bit is set in the RTCSR register and the
RTCNT counter is cleared.
Rev.4.00 Oct. 10, 2008 Page 390 of 1122
REJ09B0370-0400
*
If 1 is written, the original value is retained.
Description
RFCR has not overflowed the count limit indicated by LMTS
[Clearing condition]
When 0 is written to OVF
RFCR has overflowed the count limit indicated by LMTS
[Setting condition]
When RFCR overflows the count limit set by LMTS*
Description
Interrupt requests initiated by OVF are disabled
Interrupt requests initiated by OVF are enabled
Description
Count limit is 1024
Count limit is 512
(Initial value)
(Initial value)
(Initial value)
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