DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 197

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 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: -

7.3
7.3.1
One of three functions can be selected for the H8/3048B Group refresh controller: interfacing to
DRAM connected to area 3, interfacing to pseudo-static RAM connected to area 3, or interval
timing. Table 7.3 summarizes the register settings when these three functions are used.
Table 7.3
Register Settings
RFSHCR
RTCOR
RTMCSR
P8DDR
ABWCR
Operation
Overview
Refresh Controller Settings
PSRAME
DRAME
CAS/WE
M9/M8
RFSHE
RCYCE
CKS0
CMF
CMIE
P8
SRFMD
CKS2 to
ABW3
1
DDR
DRAM Interface
Selects self-refresh
mode
Cleared to 0
Set to 1
Selects 2CAS or
2WE mode
Selects column
addressing mode
Selects RFSH signal
output
Selects insertion of
refresh cycles
Refresh interval
setting
Set to 1 when
RTCNT = RTCOR
Cleared to 0
Set to 1 (CS
Cleared to 0
3
output)
PSRAM Interface
Selects self-refresh
mode
Set to 1
Cleared to 0
—
—
Selects RFSH signal
output
Selects insertion of
refresh cycles
Refresh interval
setting
Set to 1 when
RTCNT = RTCOR
Cleared to 0
Set to 1 (CS
—
Rev. 3.00 Sep 27, 2006 page 169 of 872
Usage
3
output)
Section 7 Refresh Controller
Interval Timer
Cleared to 0
Cleared to 0
Cleared to 0
—
—
Cleared to 0
—
Interrupt interval
setting
Set to 1 when
RTCNT = RTCOR
Enables or disables
interrupt requests
Set to 0 or 1
—
REJ09B0325-0300