DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 292

• 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)
Table 9.3
Internal Clock
Frequency
9.3.2
PWDR are 8-bit readable/writable registers. The PWM has sixteen PWM data registers. Each
PWDR specifies the duty cycle of the basic pulse to be output, and the number of additional
pulses. The value set in PWDR corresponds to a 0 or 1 ratio in the conversion period. The upper
four bits specify the duty cycle of the basic pulse as 0/16 to 15/16 with a resolution of 1/16. The
lower four bits specify how many extra pulses are to be added within the conversion period
comprising 16 basic pulses. Thus, a specification of 0/256 to 255/256 is possible for 0/1 ratios
within the conversion period. For 256/256 (100%) output, port output should be used. PWDR0 to
PWDR15 are initialized to H'00.
9.3.3
Each PWDPR selects the PWM output phase.
Bit
7
6
5
4
3
2
1
0
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PWDPRA
Bit Name
OS7
OS6
OS5
OS4
OS3
OS2
OS1
OS0
PWM Data Registers (PWDR0 to PWDR15)
PWM Data Polarity Registers A and B (PWDPRA, PWDPRB)
Resolution, PWM Conversion Period and Carrier Frequency when = 10 MHz
Initial Value
0
0
0
0
0
0
0
0
Resolution
100 ns
200 ns
400 ns
800 ns
1600 ns
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Output Select 7 to 0
These bits select the PWM output phase. Bits OS7 to
OS0 correspond to outputs PW7 to PW0.
0: PWM direct output (PWDR value corresponds to high
1: PWM inverted output (PWDR value corresponds to
width of output)
low width of output)
PWM Conversion
Period
25.6 s
51.2 s
102.4 s
204.8 s
409.6 s
Carrier Frequency
625 kHz
312.5 kHz
156.3 kHz
78.1 kHz
39.1 kHz