DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 166

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• 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: 128-QFP
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6.4.5
Wait Control
When accessing external space, the H8S/2357 Group can extend the bus cycle by inserting one or more wait states (T
).
w
There are two ways of inserting wait states: program wait insertion and pin wait insertion using the WAIT pin.
Program Wait Insertion: From 0 to 3 wait states can be inserted automatically between the T
state and T
state on an
2
3
individual area basis in 3-state access space, according to the settings of WCRH and WCRL.
Pin Wait Insertion: Setting the WAITE bit in BCRL to 1 enables wait insertion by means of the WAIT pin. Program wait
insertion is first carried out according to the settings in WCRH and WCRL. Then , if the WAIT pin is low at the falling
state is inserted. If the WAIT pin is held low, T
edge of ø in the last T
or T
state, a T
states are inserted until it goes
2
w
w
w
high.
This is useful when inserting four or more T
states, or when changing the number of T
states for different external
w
w
devices.
The WAITE bit setting applies to all areas.
Rev.6.00 Oct.28.2004 page 136 of 1016
REJ09B0138-0600H