HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 285

• Manufacturer Part Number: HD64F3048BF25
• Description: IC H8 MCU FLASH 128K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048BF25

• 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): 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-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

8.6.8
When a transfer is aborted by clearing the DTE bit or suspended by an NMI that clears the DTME
bit, if this halts a channel for which the DMAC has a transfer request pending internally, a dead
cycle may occur. This dead cycle does not update the halted channel’s address register or counter
value. Figure 8.27 shows an example in which an auto-requested transfer in cycle-steal mode on
channel 0 is aborted by clearing the DTE bit in channel 0.
Address bus
RD
HWR, LWR
Bus Cycle when Transfer Is Aborted
Figure 8.27 Bus Timing at Abort of DMA Transfer in Cycle-Steal Mode
CPU cycle
T
1
T
2
T
d
T
1
DMAC cycle
T
2
T
1
T
2
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T
1
CPU cycle
DTE bit is
cleared
T
2
T
3
Section 8 DMA Controller
T
d
DMAC
cycle
T
d
REJ09B0325-0300
T
1
CPU cycle
T
2