DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 244

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 8 DMA Controller
Table 8.8
Register
Legend:
MAR: Memory address register
IOAR: I/O address register
ETCR: Execute transfer count register
In repeat mode ETCRH is used as the transfer counter while ETCRL holds the initial transfer
count. ETCRH is decremented by 1 at each transfer until it reaches H'00, then is reloaded from
ETCRL. MAR is also restored to its initial value, which is calculated from the DTSZ and DTID
bits in DTCR. Specifically, MAR is restored as follows:
ETCRH and ETCRL should be initially set to the same value.
In repeat mode transfers continue until the CPU clears the DTE bit to 0. After DTE is cleared to 0,
if the CPU sets DTE to 1 again, transfers resume from the state at which DTE was cleared. No
CPU interrupt is requested.
Rev. 3.00 Mar 21, 2006 page 214 of 814
REJ09B0302-0300
23
23
All 1s
MAR
MAR
Register Functions in Repeat Mode
MAR – (–1)
7
7
ETCRH
7
ETCRL
IOAR
0
0
0
0
DTID
Activated by
SCI 0 Receive-
Data-Full
Interrupt
Destination
address
register
Source
address
register
Transfer
counter
Hold transfer
count
· 2
DTSZ
Function
· ETCRL
Other
Activation
Source
address
register
Destination
address
register
Transfer
counter
Hold transfer
count
Initial Setting
Destination or
source address
Source or
destination
address
Number of
transfers
Number of
transfers
Operation
Incremented or
decremented at
each transfer
until H'0000,
then restored to
initial value
Held fixed
Decremented
once per
transfer until
H'0000 is
reached, then
reloaded from
ETCRL
Held fixed