DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 290

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148BTE20; HD64F2148BTE20

Section 9 8-Bit PWM Timer (PWM)
9.3.1
PWSL is used to select the input clock and the PWM data register.
Rev. 3.00 Mar 21, 2006 page 234 of 788
REJ09B0300-0300
Bit
7
6
5
4
Bit Name
PWCKE
PWCKS
—
—
PWM Register Select (PWSL)
Initial Value
0
0
1
0
R/W
R/W
R/W
R
R
Description
PWM Clock Enable
PWM Clock Select
These bits, together with bits PWCKB and PWCKA in
PCSR, select the internal clock input to TCNT in the
PWM. For details, see table 9.2.
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
Carrier frequency = 16/PWM conversion period
With a 10 MHz system clock ( ), the resolution, PWM
conversion period, and carrier frequency are as shown
in table 9.3.
Reserved
This bit is always read as 1 and cannot be modified.
Reserved
This bit is always read as 0 and cannot be modified.
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