DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 186

• 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
Features as an Interval Timer
7.1.2
Figure 7.1 shows a block diagram of the refresh controller.
Rev. 7.00 Sep 21, 2005 page 160 of 878
REJ09B0259-0700
RFSH signal output for refresh control
Software-selectable refresh interval
Software-selectable self-refresh mode
Wait states can be inserted
Refresh timer counter (RTCNT) can be used as an 8-bit up-counter
Selection of seven counter clock sources: /2, /8, /32, /128, /512, /2048, /4096
Interrupts can be generated by compare match between RTCNT and the refresh time constant
register (RTCOR)
Block Diagram
Legend
RTCNT:
RTCOR:
RTMCSR:
RFSHCR:
/2, /8, /32,
/128, /512,
/2048, /4096
Figure 7.1 Block Diagram of Refresh Controller
Clock selector
Comparator
Refresh timer counter
Refresh time constant register
Refresh timer control/status register
Refresh control register
Module data bus
Refresh signal
Control logic
CMI interrupt