MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 157
MC68HC908LB8CPE
Manufacturer Part Number
MC68HC908LB8CPE
Description
IC MCU 8K FLASH 8MHZ 20DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908LB8CDWE.pdf
(234 pages)
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908LB8CPE
Manufacturer:
IR
Quantity:
10
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LDFQ1 and LDFQ0 — PWM Load Frequency Bits
DIS1 — Software Disable Bit for PWM1
DIS0 — Software Disable Bit for PWM0
POL1 — Polarity Bit for PWM1
Freescale Semiconductor
These buffered read/write bits select the PWM CPU load frequency according to
This read/write bit allows the user to disable pin PWM1.
This read/write bit allows the user to disable pin PWM0.
This read/write bit selects the polarity of the PWM waveform of PWM1. Positive polarity means that
when the PWM is active the PWM output is high. Conversely, negative polarity means that when the
PWM is active the PWM output is low.
1 = Disable PWM1
0 = Re-enable PWM1
1 = Disable PWM0
0 = Re-enable PWM0
1 = PWM1 has positive polarity
0 = PWM1 has negative polarity
Address:
When reading these bits, the value read is the buffer value (not necessarily
the value the PWM generator is currently using).
The LDFQx bits take effect when the current load cycle is complete
regardless of the state of the load okay bit, LDOK.
Reading the LDFQx bit reads the buffered values and not necessarily the
values currently in effect.
Reset:
Read:
Write:
LDFQ1
$0041
Bit 7
Bold
0
Figure 15-21. PWM Control Register 2 (PCTL2)
Reload Frequency Bits
LDFQ1 and LDFQ0
= Buffered
LDFQ0
Table 15-4. PWM Reload Frequency
6
0
MC68HC908LB8 Data Sheet, Rev. 1
00
01
10
11
DIS1
5
0
NOTE
NOTE
DIS0
4
0
POL1
Every 2 PWM cycles
Every 4 PWM cycles
Every 8 PWM cycles
3
1
Every PWM cycle
PWM Reload
Frequency
POL0
2
1
PRSC1
1
0
Table
PRSC0
Control Logic Block
Bit 0
0
15-4.
157
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