HD6417750RF240DV Renesas Electronics America, HD6417750RF240DV Datasheet - Page 505

• Manufacturer Part Number: HD6417750RF240DV
• Description: MPU 3V 16K I-TEMP,PB-FREE 208-QF
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417750RF240DV

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 28
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

13.2.13 Refresh Time Constant Register (RTCOR)
The refresh time constant register (RTCOR) is a readable/writable register that specifies the upper
limit of the RTCNT counter. The RTCOR register and RTCNT counter values (lower 8 bits) are
constantly compared, and when they match the CMF bit is set in the RTCSR register and the
RTCNT counter is cleared to 0. If the refresh bit (RFSH) has been set to 1 in the memory control
register (MCR) and CAS-before-RAS has been selected as the refresh mode, a memory refresh
cycle is generated when the CMF bit is set.
RTCOR is initialized to H'0000 by a power-on reset, but is not initialized, and retains its contents,
in a manual reset and in standby mode.
Initial value:
Initial value:
R/W:
R/W:
Bit:
Bit:
R/W
15
—
—
0
7
0
R/W
14
—
—
0
6
0
R/W
13
—
—
0
5
0
R/W
12
—
—
0
4
0
Rev.7.00 Oct. 10, 2008 Page 419 of 1074
Section 13 Bus State Controller (BSC)
R/W
11
—
—
0
3
0
R/W
10
—
—
0
2
0
REJ09B0366-0700
R/W
—
—
9
0
1
0
R/W
—
—
8
0
0
0