DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 313

• 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 10.3 Switching of Internal Clock and FRC Operation
No.
1
2
3
Timing of Switchover
by Means of CKS1
and CKS0 Bits
Switching from
low to low
Switching from
low to high
Switching from
high to low
FRC Operation
Clock before
switchover
Clock after
switchover
FRC clock
FRC
Clock before
switchover
Clock after
switchover
FRC clock
FRC
Clock before
switchover
Clock after
switchover
FRC clock
FRC
N
N
N
CKS bit rewrite
Rev.2.00 May. 28, 2009 Page 273 of 732
N + 1
CKS bit rewrite
N + 1
CKS bit rewrite
*
N + 1
N + 2
N + 2
REJ09B0059-0200