DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 167
DF2437FV
Manufacturer Part Number
DF2437FV
Description
IC H8S/2437 MCU FLASH 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Specifications of DF2437FV
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
85
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
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2437FV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 167 of 776
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6.5.5
When accessing the external address space, this LSI can extend the bus cycle by inserting the wait
states (T
WAIT pin, and the combination of program wait and the WAIT pin.
In Normal Extended Mode:
1. Program Wait Mode
2. Pin Wait Mode
3. Pin Auto-Wait Mode
When the external address is accessed in the program wait mode, the T
states which are set by the WCn1 and WCn0 pins of the BCRAn, is always inserted between
the T
A specified number of wait states T
when accessing the external address space. The number of wait states T
settings of the WCn1 and WCn0 bits. If the WAIT pin is low at the falling edge of φ in the last
T
until it goes high.
Pin wait mode is useful when inserting four or more T
of T
A specified number of wait states T
accessing the external address space if the WAIT pin is low at the falling edge of φ in the last
T
Even if the WAIT pin is held low, T
states.
Pin auto-wait mode enables the low-speed memory interface only by inputting the chip select
signal to the WAIT pin.
Figure 6.25 shows an example of wait state insertion timing in pin wait mode.
The settings after a reset are: 3-state access, 3-state program wait insertion, and WAIT pin
input disabled.
2
2
or T
state. The number of wait states T
W
W
2
). Ways of inserting wait states: Program wait insertion, pin wait insertion using the
states to be inserted for each external device.
Wait Control
and the T
W
state, another T
3
states.
W
state is inserted. If the WAIT pin is held low, T
W
W
W
W
are always inserted between the T
are inserted between the T
states are inserted only up to the specified number of
is specified by the settings of the WCn1 and WCn0 bits.
W
states, or when changing the number
Rev.2.00 May. 28, 2009 Page 127 of 732
2
state and T
W
2
W
of the number of
state and T
is specified by the
W
states are inserted
3
state when
REJ09B0059-0200
3
state
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