R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 535

• Manufacturer Part Number: R5F61668RN50FPV
• Description: IC H8SX/1668 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668RN50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: R0K561668S000BE - KIT STARTER FOR H8SX/1668R0K561664S001BE - KIT STARTER FOR H8SX/1651HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

When EDDAR is read during a transfer operation, a longword access must be used. During a
transfer operation, EDDAR may be updated without regard to accesses from the CPU, and the
correct values may not be read if the upper and lower words are read separately. Do not write to
EDDAR for a channel on which a transfer operation is in progress.
(3)
When an EXDMA transfer is performed, the value in EDTCR is decremented by the number of
bytes transferred. When a byte is transferred, the value is decremented by 1; when a word is
transferred, the value is decremented by 2; when a longword is transferred, the value is
decremented by 4. However, when the EDTCR value is 0, transfers are not counted and the
EDTCR value does not change.
All of the bits of EDTCR may change, so when EDTCR is read by the CPU during EXDMA
transfer, a longword access must be used. During a transfer operation, EDTCR may be updated
without regard to accesses from the CPU, and the correct values may not be read if the upper and
lower words are read separately. Do not write to EDTCR for a channel on which a transfer
operation is in progress.
If there is conflict between an address update associated with EXDMA transfer and a write by the
CPU, the CPU write has priority.
In the event of conflict between an EDTCR update from 1, 2, or 4 to 0 and a write (of a nonzero
value) by the CPU, the CPU write value has priority as the EDTCR value, but transfer is
terminated.
(4)
EDBSR is valid in block transfer or repeat transfer mode. EDBSR31 and EDBSR16 are used as
BKSZH and EDBSR15 and EDBSR0 for BKSZ. The 16 bits of BKSZH holds a block size and
repeat size and their values do not change. The 16 bits of BKSZ functions as a block size or repeat
size counter, the value of which is decremented by 1 when one data transfer is performed. When
the BKSZ value is determined as 0 during EXDMA transfer, the EXDMAC does not store 0 in
BKSZ and stores the BKSZH value.
The upper 16 bits of EDBSR is never updated, allowing a word-size access.
Do not write to EDBSR for a channel on which a transfer operation is in progress.
EXDMA Transfer Count Register (EDTCR)
EXDMA Block Size Register (EDBSR)
Rev. 2.00 Sep. 24, 2008 Page 501 of 1468
Section 11 EXDMA Controller (EXDMAC)
REJ09B0412-0200