DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 178

• 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: -

Section 7 Refresh Controller
7.1.3
Table 7.1 summarizes the refresh controller’s input/output pins.
Table 7.1
Pin
RFSH
HWR
LWR
RD
CS
7.1.4
Table 7.2 summarizes the refresh controller’s registers.
Table 7.2
Address *
H'FFAC
H'FFAD
H'FFAE
H'FFAF
Note: * Lower 16 bits of the address.
Rev. 3.00 Mar 21, 2006 page 148 of 814
REJ09B0302-0300
3
Name
Refresh
Upper write/upper column
address strobe
Lower write/lower column
address strobe
Column address strobe/
write enable
Row address strobe
Pin Configuration
Register Configuration
Refresh Controller Pins
Refresh Controller Registers
Name
Refresh time constant register
Refresh control register
Refresh timer control/status register
Refresh timer counter
Signal
Abbr.
RFSH
UW/UCAS
LW/LCAS
CAS/WE
RAS
I/O
Output
Output
Output
Output
Output
Abbreviation
RFSHCR
RTMCSR
RTCNT
RTCOR
Function
Goes low during refresh cycles;
used to refresh DRAM and PSRAM
Connects to the UW pin of 2WE
DRAM or UCAS pin of 2CAS DRAM
Connects to the LW pin of 2WE
DRAM or LCAS pin of 2CAS DRAM
Connects to the CAS pin of 2WE
DRAM or WE pin of 2CAS DRAM
Connects to the RAS pin of DRAM
R/W
R/W
R/W
R/W
R/W
H'07
H'00
Initial Value
H'02
H'FF