DF2378BVFQ35V Renesas Electronics America, DF2378BVFQ35V Datasheet - Page 422

• Manufacturer Part Number: DF2378BVFQ35V
• Description: IC H8S/2378 MCU FLASH 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2378BVFQ35V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 35MHz
• Connectivity: I²C, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 97
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 6x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: YLCDRSK2378 - KIT DEV EVAL H8S/2378 LCDYR0K42378FC000BA - KIT EVAL FOR H8S/2378HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)EDK2378 - DEV EVAL KIT FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 7 DMA Controller (DMAC)
7.7
7.7.1
Except for forced termination of the DMAC, the operating (including transfer waiting state)
channel setting should not be changed. The operating channel setting should only be changed
when transfer is disabled. Also, DMAC registers should not be written to in a DMA transfer.
DMAC register reads during operation (including the transfer waiting state) are described below.
• DMAC control starts one cycle before the bus cycle, with output of the internal address.
φ
DMA Internal
address
Rev.7.00 Mar. 18, 2009 page 354 of 1136
REJ09B0109-0700
DMA register
operation
DMA control
Consequently, MAR is updated in the bus cycle before DMA transfer. Figure 7.39 shows an
example of the update timing for DMAC registers in dual address transfer mode.
[1] Transfer source address register MAR operation (incremented/decremented/fixed)
[2] Transfer destination address register MAR operation (incremented/decremented/fixed)
[2']Transfer destination address register MAR operation (incremented/decremented/fixed)
[3] Transfer address register MAR restore operation (in block or repeat transfer mode)
Note: In single address transfer mode, the update timing is the same as [1].
Transfer counter ETCR operation (decremented)
Transfer counter ETCR restore (in repeat transfer mode)
Block size counter ETCR operation (decremented in block transfer mode)
Block transfer counter ETCR operation (decremented, in last transfer cycle of
a block in block transfer mode)
Block size counter ETCR restore (in block transfer mode)
Usage Notes
DMAC Register Access during Operation
The MAR operation is post-incrementing/decrementing of the DMA internal address value.
Idle
[1]
Transfer
source
Read
Figure 7.39 DMAC Register Update Timing
DMA read
[2]
destination
DMA transfer cycle
Transfer
Write
DMA write
Idle
[1]
Transfer
source
Read
[2']
DMA read
DMA last transfer cycle
destination
Write
Transfer
DMA write
[3]
Dead
DMA
dead
Idle