D12332VFC25 Renesas Electronics America, D12332VFC25 Datasheet - Page 314

• Manufacturer Part Number: D12332VFC25
• Description: MCU 3V 0K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12332VFC25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 106
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: HD6412332VFC25; HD6412332VFC25

Figure 7.34 shows an example of single address transfer using the write data buffer function. In
this example, the CPU program area is in on-chip memory.
When the write data buffer function is activated, the DMAC recognizes that the bus cycle
concerned has ended, and starts the next operation. Therefore, DREQ pin sampling is started one
state after the start of the DMA write cycle or single address transfer.
7.5.13
The DMAC channel priority order is: channel 0 > channel 1, and channel A > channel B. Table
7.13 summarizes the priority order for DMAC channels.
Table 7.13 DMAC Channel Priority Order
Short Address Mode
Channel 0A
Channel 0B
Channel 1A
Channel 1B
Rev.4.00 Sep. 07, 2007 Page 282 of 1210
REJ09B0245-0400
Figure 7.34 Example of Single Address Transfer Using Write Data Buffer Function
Internal read signal
External address
Internal address
DMAC Multi-Channel Operation
DACK
RD
φ
DMA
read
Full Address Mode
Channel 0
Channel 1
DMA
single
CPU
read
DMA
single
Priority
High
Low
CPU
read