DF2372RVFQ34V Renesas Electronics America, DF2372RVFQ34V Datasheet - Page 267

• Manufacturer Part Number: DF2372RVFQ34V
• Description: IC H8S/2372 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2372RVFQ34V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 34MHz
• Connectivity: I²C, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 6x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: YLCDRSK2378 - KIT DEV EVAL H8S/2378 LCDYR0K42378FC000BA - KIT EVAL FOR H8S/2378HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 6 Bus Controller (BSC)
6.6.9
Wait Control
There are two ways of inserting wait states in a DRAM access cycle: program wait insertion and
pin wait insertion using the WAIT pin.
Wait states are inserted to extend the CAS assertion period in a read access to DRAM space, and
to extend the write data setup time relative to the falling edge of CAS in a write access.
Program Wait Insertion: When the bit in ASTCR corresponding to an area designated as DRAM
space is set to 1, from 0 to 7 wait states can be inserted automatically between the T
state and T
c1
c2
state, according to the settings in WTCR.
Pin Wait Insertion: When the WAITE bit in BCR is set to 1 and the ASTCR bit is set to 1, wait
input by means of the WAIT pin is enabled. When DRAM space is accessed in this state, a
) is first inserted. If the WAIT pin is low at the falling edge of φ in the last T
program wait (T
or
w
c1
state is inserted. If the WAIT pin is held low, T
T
state, another T
states are inserted until it
w
w
w
goes high.
Figures 6.26 and 6.27 show examples of wait cycle insertion timing in the case of 2-state and 3-
state column address output cycles.
Rev.7.00 Mar. 18, 2009 page 199 of 1136
REJ09B0109-0700