DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 237

• 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: -

7.5.6
In normal mode, transfer is performed with channels A and B used in combination. Normal mode can be specified by
setting the FAE bit in DMABCR to 1 and clearing the BLKE bit in DMACRA to 0.
In normal mode, MAR is updated after each byte or word transfer in response to a single transfer request, and this is
executed the number of times specified in ETCRA. The transfer source is specified by MARA, and the transfer destination
by MARB.
Table 7-10 summarizes register functions in normal mode.
Table 7-10 Register Functions in Normal Mode
Legend:
MARA: Memory address register A
MARB: Memory address register B
ETCRA: Transfer count register A
MARA and MARB specify the start addresses of the transfer source and transfer destination, respectively, as 24 bits.
MAR can be incremented or decremented by 1 or 2 each time a byte or word is transferred, or can be fixed.
Incrementing, decrementing, or holding a fixed value can be set separately for MARA and MARB.
The number of transfers is specified by ETCRA as 16 bits. ETCRA is decremented each time a transfer is performed, and
when its value reaches H'0000 the DTE bit is cleared and transfer ends. If the DTIE bit is set to 1 at this time, an interrupt
request is sent to the CPU or DTC.
The maximum number of transfers, when H'0000 is set in ETCRA, is 65,536.
Normal Mode
Register
23
23
15
MARA
MARB
ETCRA
0
0
0
Function
Source address
register
Destination
address register
Transfer counter Number of transfers Decremented every
Initial Setting
Start address of
transfer source
Start address of
transfer destination
Rev.6.00 Oct.28.2004 page 207 of 1016
Operation
Incremented/decremented
every transfer, or fixed
Incremented/decremented
every transfer, or fixed
transfer; transfer ends
when count reaches
H'0000
REJ09B0138-0600H