DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 193

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

6.7.4
Figure 6.19 shows the timing for transition to the bus-released state.
Address bus
HWR, LWR
[1]
[2]
[3]
[4]
[5]
Data bus
Low level of BREQ pin is sampled at rise of T
BACK pin is driven low at end of CPU read cycle, releasing bus to external
bus master.
BREQ pin state is still sampled in external bus released state.
High level of BREQ pin is sampled.
BACK pin is driven high, ending bus release cycle.
BREQ
BACK
Transition Timing
RD
AS
Figure 6.19 Bus-Released State Transition Timing
T
0
CPU cycle
T
Address
1
[1]
Minimum
1 state
T
2
[2]
2
state.
External bus released state
[3]
Rev. 4.00 Feb 15, 2006 page 167 of 900
High impedance
High impedance
High impedance
High impedance
High impedance
Section 6 Bus Controller
[4]
REJ09B0291-0400
[5]
cycle
CPU