MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 154

• Manufacturer Part Number: MC68HC908LB8CPE
• Description: IC MCU 8K FLASH 8MHZ 20DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LB8CPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVR, POR, PWM
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

Pulse Width Modulator with Fault Input (PWM)
To avoid erroneous PWM periods, this value is buffered and will not be used by the PWM generator until
the LDOK bit has been set and the next PWM load cycle begins.
15.8.3 PWMx Value Registers
Each of the two PWMs has a 16-bit PWM value register.
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Address:
Address:
When reading this register, the value read is the buffer (not necessarily the
value the PWM generator is currently using).
Because of the equals-comparator architecture of this PWM, the modulus =
0 case is considered illegal. Therefore, the modulus register is not reset,
and a modulus value of 0 will result in waveforms inconsistent with the other
modulus waveforms. If a modulus of 0 is loaded, the counter will continually
count down from $FFF. This operation will not be tested or guaranteed (the
user should consider it illegal). However, the fault conditions will still be
guaranteed.
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Figure 15-16. PWM Counter Modulo Register High (PMODH)
Figure 15-17. PWM Counter Modulo Register Low (PMODL)
$0047
$0048
Bit 15
Bit 7
Bit 7
Bit 7
Bit 7
Bold
Figure 15-18. PWMx Value Registers High (PVALxH)
0
0
0
= Unimplemented
= Buffered
Bit 14
Bit 6
6
0
0
6
6
0
MC68HC908LB8 Data Sheet, Rev. 1
Bit 13
Bit 5
5
0
0
5
5
0
Indeterminate after reset
NOTE
Bit 12
Bit 4
4
0
0
4
4
0
Bit 11
Bit 11
Bit 3
3
3
3
0
Indeterminate after reset
Bit 10
Bit 10
Bit 2
2
2
2
0
Bit 9
Bit 1
Bit 9
1
1
1
0
Freescale Semiconductor
Bit 0
Bit 8
Bit 0
Bit 0
Bit 0
Bit 8
0