DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 194

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• 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): 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
7.3
7.3.1
One of three functions can be selected for the H8/3048 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
Rev. 7.00 Sep 21, 2005 page 168 of 878
REJ09B0259-0700
Operation
Overview
Refresh Controller Settings
PSRAME
DRAME
CAS/WE
M9/M8
RFSHE
RCYCE
CKS2 to
CKS0
CMF
CMIE
P8
SRFMD
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
—
Usage
3
output)
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
—