DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 140

• 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: -

Table 6.3
[Legend]
n = 1 to 3
*: Don’t care.
Multiplex Extended Mode:
The bus access is used as both the address bus and the data bus, but not simultaneously.
1. Bus Width
2. Number of Access States
3. Wait Mode and Number of Program Wait States
Rev.2.00 May. 28, 2009 Page 100 of 732
REJ09B0059-0200
ASTn
0
1
A bus width of 8 or 16 bits can be selected with the ABWn bit in BCRAn. The bus width of
the address cycle and the data cycle are the same.
⎯ Address cycle state
⎯ Data cycle state
⎯ Address cycle wait
⎯ Data cycle wait
The address cycle state is 2-state.
The number of access states for data access , 2-state or 3-state can be selected with the
ASTn bit in BCRAn. When 2-state access space is designated, wait state insertion is
disabled.
The number of program wait states to be inserted into the address cycle are selected by the
AWn bit in BCRAn. 0 or 1 address cycle program wait states can be selected. The address
cycle wait is not affected by the number of data access wait states or the wait mode.
When 3-state access space is designated by the ASTn bit in BCRAn, the number of
program wait states to be inserted automatically are selected with WMSn1, WMSn0,
WCn1, and WCn0 in the BCRAn. From 0 to 3 data cycle wait states can be selected.
Bus Specifications for Normal Extended Bus Interface
WMSn1
⎯
0
0
1
WMSn0
⎯
1
0
*
WCn1
⎯
⎯
0
1
WCn0
⎯
⎯
0
1
0
1
Number of
Access
States
2
3
3
3
3
3
Number of
Program
Wait States
0
0
0
1
2
3