DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 134

• 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: -

Multiplex Extension:
The address output pins and data input/output pins are multiplex pins
• Minimization of number of pins
• Usable areas
• Multiplex extended bus interface
• Idle cycle insert
Rev.2.00 May. 28, 2009 Page 94 of 732
REJ09B0059-0200
External bus control signals
It is possible to minimize the number of pins necessary for expansion by multiplexing the
address output pins and data input/output pins.
Areas 1, 2, and 3 are all usable
In the address cycle there are 2-state access fixed areas
In the data cycle 2-state access areas or 3-state access areas are able to be selected
The address cycle or data cycle can be independently inserted into the program wait state
Idle cycle insert is possible during the external write cycle, directly after external read cycle
[Legend]
BCR:
BCRA1:
BCRA2:
BCRA3:
Bus control register
Basic area/area 1 control register
Area 2 control register
Area 3 control register
Figure 6.1 Block Diagram of Bus Controller
BCRA2
controller
controller
BCR
Bus
Wait
BCRA1
BCRA3
Internal control signals
Bus mode signal