DF2370RVFQ34V Renesas Electronics America, DF2370RVFQ34V Datasheet - Page 455
![IC H8S/2370 MCUFLSH 256K 144LQFP](/photos/12/41/124197/df2370rvfq34v_sml.jpg)
DF2370RVFQ34V
Manufacturer Part Number
DF2370RVFQ34V
Description
IC H8S/2370 MCUFLSH 256K 144LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Datasheet
1.YR0K42378FC000BA.pdf
(1208 pages)
Specifications of DF2370RVFQ34V
Core Processor
H8S/2000
Core Size
16-Bit
Speed
34MHz
Connectivity
I²C, IrDA, SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 6x8b
Oscillator Type
External
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)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2370RVFQ34V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 455 of 1208
- Download datasheet (8Mb)
Section 8 EXDMA Controller (EXDMAC)
EXDMA Transfer Count Register (EDTCR): When a DMA transfer is performed, the value in
EDTCR is decremented by 1. However, when the EDTCR value is 0, transfers are not counted and
the EDTCR value does not change.
EDTCR functions differently in block transfer mode. The upper 8 bits, EDTCR[23:16], are used to
specify the block size, and their value does not change. The lower 16 bits, EDTCR[15:0], function
as a transfer counter, the value of which is decremented by 1 when a DMA transfer is performed.
However, when the EDTCR[15:0] value is 0, transfers are not counted and the EDTCR[15:0]
value does not change.
In normal transfer mode, all of the lower 24 bits of EDTCR may change, so when EDTCR is read
by the CPU during DMA 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. In a longword access, the EXDMAC
buffers the EDTCR value to ensure that the correct value is output.
In block transfer mode, the upper 8 bits are never updated, so there is no problem with using word
access.
Do not write to EDTCR for a channel on which a transfer operation is in progress. If there is
contention between an address update associated with DMA transfer and a write by the CPU, the
CPU write has priority.
In the event of contention between an EDTCR update from 1 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.
Transfer does not end if the CPU writes 0 to EDTCR.
Figure 8.11 shows EDTCR update operations in normal transfer mode and block transfer mode.
Rev.7.00 Mar. 18, 2009 page 387 of 1136
REJ09B0109-0700
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