HD64F3048VTF8 Renesas Electronics America, HD64F3048VTF8 Datasheet - Page 212

• Manufacturer Part Number: HD64F3048VTF8
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048VTF8

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 8MHz
• 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): 2.7 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: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F3048VX8

Section 7 Refresh Controller
Refresh Cycle Priority Order: When there are simultaneous bus requests, the priority order is:
For details see section 6.3.7, Bus Arbiter Operation.
Wait State Insertion: When bit AST3 is set to 1 in ASTCR, the wait state controller (WSC) can
insert wait states into bus cycles and refresh cycles. For details see section 6.3.5, Wait Modes.
Self-Refresh Mode: Some pseudo-static RAM devices have a self-refresh function. After the
SRFMD bit is set to 1 in RFSHCR, when a transition to software standby mode occurs, the
H8/3048 Group’ CS
RAM self-refresh function can be used. On exit from software standby mode, the RFSH output
goes high.
Table 7.8 shows the pin states in software standby mode. Figure 7.16 shows the signal output
timing.
Table 7.8
Signal
CS
RD
HWR
LWR
RFSH
Rev. 7.00 Sep 21, 2005 page 186 of 878
REJ09B0259-0700
3
(High)
Pin States in Software Standby Mode (2) (PSRAME = 1, DRAME = 0)
External bus master > refresh controller > DMA controller > CPU
3
output goes high and its RFSH output goes low so that the pseudo-static
SRFMD = 0
High
High-impedance
High-impedance
High-impedance
High
Software Standby Mode
SRFMD = 1 (Self-Refresh Mode)
High
High-impedance
High-impedance
High-impedance
Low
(Low)