DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 229

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• 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: 256KB (256K 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: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

7.5.3
Idle mode can be specified by setting the RPE bit and DTIE bit in DMACR to 1. In idle mode, one byte or word is
transferred in response to a single transfer request, and this is executed the number of times specified in ETCR.
One address is specified by MAR, and the other by IOAR. The transfer direction can be specified by the DTDIR bit in
DMACR.
Table 7-7 summarizes register functions in idle mode.
Table 7-7
Legend:
MAR: Memory address register
IOAR: I/O address register
ETCR: Transfer count register
DTDIR:Data transfer direction bit
MAR specifies the start address of the transfer source or transfer destination as 24 bits. MAR is neither incremented nor
decremented each time a byte or word is transferred.
IOAR specifies the lower 16 bits of the other address. The 8 bits above IOAR have a value of H'FF.
Figure 7-5 illustrates operation in idle mode.
Idle Mode
Register
23
23
Register Functions in Idle Mode
H'FF
MAR
15
15
MAR
ETCR
IOAR
0
0
0
Figure 7-5 Operation in Idle Mode
DTDIR = 0 DTDIR = 1 Initial Setting
Source
address
register
Destination
address
register
Transfer counter
Function
Destination
address
register
Source
address
register
Transfer
1 byte or word transfer performed in
response to 1 transfer request
Start address of
transfer destination
or transfer source
Start address of
transfer source or
transfer destination
Number of transfers Decremented every
Rev.6.00 Oct.28.2004 page 199 of 1016
Operation
Fixed
Fixed
transfer; transfer
ends when count
reaches H'0000
IOAR
REJ09B0138-0600H