DF2328BVF25V Renesas Electronics America, DF2328BVF25V Datasheet - Page 235
DF2328BVF25V
Manufacturer Part Number
DF2328BVF25V
Description
IC H8S MCU FLASH 256K 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Datasheets
1.HEWH8E10A.pdf
(19 pages)
2.D12312SVTE25V.pdf
(341 pages)
3.D12322RVF25V.pdf
(1304 pages)
Specifications of DF2328BVF25V
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
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)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
For Use With
EDK2329 - DEV EVALUATION KIT H8S/2329
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
HD64F2328BVF25V
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2328BVF25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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6.8
6.8.1
When the chip accesses external space, it can insert a 1-state idle cycle (T
the following two cases: (1) when read accesses in different areas occur consecutively, and (2)
when a write cycle occurs immediately after a read cycle. By inserting an idle cycle it is possible,
for example, to avoid data collisions between ROM, with a long output floating time, and high-
speed memory, I/O interfaces, and so on.
Consecutive Reads in Different Areas: If consecutive reads in different areas occur while the
ICIS1 bit in BCRH is set to 1, an idle cycle is inserted at the start of the second read cycle. This is
enabled in advanced mode.
Figure 6.31 shows an example of the operation in this case. In this example, bus cycle A is a read
cycle from ROM with a long output floating time, and bus cycle B is a read cycle from SRAM,
each being located in a different area. In (a), an idle cycle is not inserted, and a collision occurs in
cycle B between the read data from ROM and that from SRAM. In (b), an idle cycle is inserted,
and a data collision is prevented.
Address bus
CS (area A)
CS (area B)
Data bus
RD
Idle Cycle
Operation
φ
(a) Idle cycle not inserted
T
1
Bus cycle A
(ICIS1 = 0)
T
Figure 6.31 Example of Idle Cycle Operation (1)
2
T
Long output
floating time
3
Bus cycle B
T
1
T
2
Data
collision
Address bus
CS (area A)
CS (area B)
Data bus
Rev.6.00 Sep. 27, 2007 Page 203 of 1268
RD
φ
T
1
(b) Idle cycle inserted
Bus cycle A
(ICIS1 = 1 (initial value))
T
2
Section 6 Bus Controller
I
) between bus cycles in
T
3
REJ09B0220-0600
T
Bus cycle B
I
T
1
T
2
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