DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 179

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

7.2
7.2.1
RFSHCR is an 8-bit readable/writable register that selects the operating mode of the refresh
controller.
Bit
Initial value
Read/Write
RFSHCR is initialized to H'02 by a reset and in hardware standby mode.
Refresh Control Register (RFSHCR)
Register Descriptions
Self-refresh mode
Selects self-refresh mode
SRFMD
R/W
7
0
PSRAM enable and DRAM enable
These bits enable or disable connection of pseudo-static RAM and DRAM
PSRAME
R/W
6
0
DRAME
R/W
5
0
Strobe mode select
Selects 2CAS or 2WE strobing of DRAM
CAS/WE
R/W
4
0
Address multiplex mode select
Selects the number of column address bits
M9/M8
Rev. 3.00 Mar 21, 2006 page 149 of 814
R/W
3
0
Refresh pin enable
Enables refresh signal output
from the refresh pin
RFSHE
R/W
2
0
Section 7 Refresh Controller
Reserved bit
—
—
1
1
REJ09B0302-0300
Refresh cycle
enable
Enables or
disables
insertion of
refresh cycles
RCYCE
R/W
0
0