DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 266

• 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: -

8.3.1
PWSL selects the input clock and the PWM data register.
Rev.2.00 May. 28, 2009 Page 226 of 732
REJ09B0059-0200
Bit
7
6
5
4
3
2
1
0
Bit Name
PWCKE
PWCKS
—
—
—
RS2
RS1
RS0
PWM Register Select (PWSL)
Initial Value
0
0
1
0
0
0
0
0
R/W
R/W
R/W
R
R
R/W
R/W
R/W
R/W
Description
PWM Clock Enable
PWM Clock Select
These bits, together with bits PWCKB and PWCKA in
PCSR, select the internal clock input to TCNT of the
PWM. For details, see table 8.2.
The resolution, PWM conversion period, and carrier
frequency depend on the selected internal clock, and
can be obtained from the following equations.
Resolution (minimum pulse width) = 1/internal clock
frequency
PWM conversion period = resolution × 256
Carrier frequency = 16/PWM conversion period
With the 20-MHz system clock (φ), the resolution, PWM
conversion period, and carrier frequency are as shown
in table 8.3.
Reserved
This bit is always read as 1 and cannot be modified.
Reserved
This bit is always read as 0 and cannot be modified.
Reserved
The initial value should not be changed.
Register Select
These bits select the PWM data register.
000: PWDR0 selected
001: PWDR1 selected
010: PWDR2 selected
011: PWDR3 selected
100: PWDR4 selected
101: PWDR5 selected
110: PWDR6 selected
111: PWDR7 selected