HD6417727F100C Renesas Electronics America, HD6417727F100C Datasheet - Page 401
![IC SUPERH MPU ROMLESS 240QFP](/photos/28/62/286203/240-bfqfp__prqp0240kc-b_sml.jpg)
HD6417727F100C
Manufacturer Part Number
HD6417727F100C
Description
IC SUPERH MPU ROMLESS 240QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417727BP100CV.pdf
(1098 pages)
Specifications of HD6417727F100C
Core Processor
SH-3 DSP
Core Size
32-Bit
Speed
100MHz
Connectivity
FIFO, SCI, SIO, SmartCard, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
104
Program Memory Type
ROMless
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.6 V ~ 2.05 V
Data Converters
A/D 6x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
240-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417727F100C
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 401 of 1098
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2. Self-Refreshing
Self-refresh mode is a kind of standby mode in which the refresh timing and refresh addresses are
generated within the synchronous DRAM. Self-refreshing is activated by setting both the RMODE
bit and the RFSH bit to 1. The self-refresh state is maintained while the CKE signal is low.
Synchronous DRAM cannot be accessed while in the self-refresh state. Self-refresh mode is
cleared by clearing the RMODE bit to 0. After self-refresh mode has been cleared, command
issuance is disabled for the number of cycles specified by the TPC bits in MCR. Self-refresh
timing is shown in figure 12.20. Settings must be made so that self-refresh clearing and data
retention are performed correctly, and auto-refreshing is performed at the correct intervals. When
self-refreshing is activated from the state in which auto-refreshing is set, or when exiting standby
mode other than through a power-on reset, auto-refreshing is restarted if RFSH is set to 1 and
RMODE is cleared to 0 when self-refresh mode is cleared. If the transition from clearing of self-
CKIO,
CKIO2
CKE
CSn
RAS
CAS
RD/WR
Figure 12.19 Synchronous DRAM Auto-Refresh Timing
Tp
TRr
TRrw
Rev.6.00 Mar. 27, 2009 Page 343 of 1036
Section 12 Bus State Controller (BSC)
TRrw
(Tpc)
REJ09B0254-0600
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