DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 246
DF2398TE20
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
HD64F2398TE20
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2398TE20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Activation by External Request: If an external request (DREQ pin) is specified as an activation source, the relevant port
should be set to input mode in advance.
Level sensing or edge sensing can be used for external requests.
External request operation in normal mode (short address mode or full address mode) is described below.
When edge sensing is selected, a 1-byte or 1-word transfer is executed each time a high-to-low transition is detected on the
DREQ pin. The next transfer may not be performed if the next edge is input before transfer is completed.
When level sensing is selected, the DMAC stands by for a transfer request while the DREQ pin is held high. While the
DREQ pin is held low, transfers continue in succession, with the bus being released each time a byte or word is
transferred. If the DREQ pin goes high in the middle of a transfer, the transfer is interrupted and the DMAC stands by for
a transfer request.
Activation by Auto-Request: Auto-request activation is performed by register setting only, and transfer continues to the
end.
With auto-request activation, cycle steal mode or burst mode can be selected.
In cycle steal mode, the DMAC releases the bus to another bus master each time a byte or word is transferred. DMA and
CPU cycles usually alternate.
In burst mode, the DMAC keeps possession of the bus until the end of the transfer, and transfer is performed continuously.
Single Address Mode: The DMAC can operate in dual address mode in which read cycles and write cycles are separate
cycles, or single address mode in which read and write cycles are executed in parallel.
In dual address mode, transfer is performed with the source address and destination address specified separately.
In single address mode, on the other hand, transfer is performed between external space in which either the transfer source
or the transfer destination is specified by an address, and an external device for which selection is performed by means of
the DACK strobe, without regard to the address. Figure 7-17 shows the data bus in single address mode.
Rev.6.00 Oct.28.2004 page 216 of 1016
REJ09B0138-0600H
Figure 7-17 Data Bus in Single Address Mode
(high impedance)
H8S/2357
Group
HWR, LWR
D
A
15
23
DACK
to D
to A
RD
0
0
Address bus
(Read)
(Write)
External
External
memory
device
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