DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 146

• 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: -

6.5.2
Table 6.7 shows the data buses used and valid strobes for each access space.
In a read, the RD signal is valid for both the upper and lower halves of the data bus. In a write, the
HWR signal is valid for the upper half of the data bus, and the LWR signal for the lower half.
Table 6.7
Note:
Rev.2.00 May. 28, 2009 Page 106 of 732
REJ09B0059-0200
Area
8-bit access
space
16-bit access Byte
space
Undefined:
Invalid:
Ports or others:
Valid Strobes
Data Buses Used and Valid Strobes
Access
Size
Byte
Word
Read/
Write
Read
Write
Read
Write
Read
Write
Undefined data is output.
Input state with the input value ignored.
Input/output pins for ports or on-chip peripheral devices cannot be used
as data buses.
Address
—
—
Even
Odd
Even
Odd
—
—
Valid
Strobe
RD
HWR
RD
HWR
LWR
RD
HWR, LWR
Upper Data Bus
(D15 to D8/AD15
to AD8)
Valid
Valid
Invalid
Valid
Undefined
Valid
Valid
Lower Data Bus
(D7 to D0/AD7 to
AD0)
Ports or others
Ports or others
Invalid
Valid
Undefined
Valid
Valid
Valid