HD6413007F20 Renesas Electronics America, HD6413007F20 Datasheet - Page 209
HD6413007F20
Manufacturer Part Number
HD6413007F20
Description
IC H8 MCU ROMLESS 5V 100QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Datasheet
1.D13007F20V.pdf
(798 pages)
Specifications of HD6413007F20
Core Processor
H8/300H
Core Size
16-Bit
Speed
20MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
35
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
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6. Bus Controller
In (a), an idle cycle is not inserted, and a collision occurs in cycle B between the read data from
ROM and the CPU write data. In (b), an idle cycle is inserted, and a data collision is prevented.
Bus cycle A Bus cycle B
Bus cycle A Bus cycle B
T
T
T
T
T
T
T
T
T
T
T
1
2
3
1
2
1
2
3
i
1
2
φ
φ
Address bus
Address bus
RD
RD
HWR
HWR
Data bus
Data bus
Data collision
Long buffer-off time
(a) Idle cycle not inserted
(b) Idle cycle inserted
Figure 6.42 Example of Idle Cycle Operation (2) (ICIS0 = 1)
External Address Space Access Immediately after DRAM Space Access: If a DRAM space
access is followed by a non-DRAM external access when HWR and LWR have been selected as
the UCAS and LCAS output pins by means of the CSEL bit in DRCRB, a Ti cycle is inserted
regardless of the settings of bits ICIS0 and ICIS1 in BCR. Figure 6.43 shows an example of the
operation.
This is done to prevent simultaneous changing of the HWR and LWR signals used as UCAS and
LCAS in DRAM space and CSn for the space in the next cycle, and so avoid an erroneous write to
the external device in the next cycle.
cycle is not inserted when PB4 and PB5 have been selected as the UCAS and LCAS output
A T
i
pins.
In the case of consecutive DRAM space access precharge cycles (Tp), the ICIS0 and ICIS1 bit
settings are invalid. In the case of consecutive reads between different areas, for example, if the
second access is a DRAM access, only a T
cycle is inserted, and a T
cycle is not. The timing in
p
i
this case is shown in figure 6.44.
Rev.5.00 Sep. 12, 2007 Page 179 of 764
REJ09B0396-0500
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