DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 273

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: -

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
Rev. 3.00 Mar 21, 2006 page 243 of 814
T
1
CPU cycle
DTE bit is
cleared
T
2
T
3
Section 8 DMA Controller
T
d
DMAC
cycle
T
REJ09B0302-0300
d
T
1
CPU cycle
T
2