HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 275
HD64F3048BF25
Manufacturer Part Number
HD64F3048BF25
Description
IC H8 MCU FLASH 128K 100QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Datasheet
1.DF3048BF25V.pdf
(903 pages)
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD64F3048BF25
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD64F3048BF25V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 275 of 903
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8.4.9
The DMAC channel priority order is: channel 0 > channel 1 and channel A > channel B.
Table 8.12 shows the complete priority order.
Table 8.12 Channel Priority Order
Short Address Mode
Channel 0A
Channel 0B
Channel 1A
Channel 1B
If transfers are requested on two or more channels simultaneously, or if a transfer on one channel
is requested during a transfer on another channel, the DMAC operates as follows.
1. When a transfer is requested, the DMAC requests the bus right. When it gets the bus right, it
2. Once a transfer starts on one channel, requests to other channels are held pending until that
3. After each transfer in short address mode, and each externally-requested or cycle-steal transfer
4. After completion of a burst-mode transfer, or after transfer of one block in block transfer
Figure 8.19 shows the timing when channel 0A is set up for I/O mode and channel 1 for burst
mode, and a transfer request for channel 0A is received while channel 1 is active.
starts a transfer on the highest-priority channel at that time.
channel releases the bus.
in normal mode, the DMAC releases the bus and returns to step 1. After releasing the bus, if
there is a transfer request for another channel, the DMAC requests the bus again.
mode, the DMAC releases the bus and returns to step 1. If there is a transfer request for a
higher-priority channel or a bus request from a higher-priority bus master, however, the
DMAC releases the bus after completing the transfer of the current byte or word. After
releasing the bus, if there is a transfer request for another channel, the DMAC requests the bus
again.
DMAC Multiple-Channel Operation
Full Address Mode
Channel 0
Channel 1
Rev. 3.00 Sep 27, 2006 page 247 of 872
Priority
High
Low
Section 8 DMA Controller
REJ09B0325-0300
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