DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 261

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 128KB (128K 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: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

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
DMAC Multi-Channel Operation
Figure 7-34 Example of Single Address Transfer Using Write Data Buffer Function
Internal read signal
Short Address Mode
Channel 0A
Channel 0B
Channel 1A
Channel 1B
External address
Internal address
DACK
RD
ø
DMA
read
DMA
single
Full Address Mode
Channel 0
Channel 1
CPU
read
DMA
single
Rev.6.00 Oct.28.2004 page 231 of 1016
Priority
High
Low
CPU
read
REJ09B0138-0600H