MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 108
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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High Resolution PWM (HRP)
P[10:0] — 11-Bit Period Value
STEP[4:0] — 5-Bit Dithering Step Value
10.8.4 HRP Deadtime Register
This read/write register contains an 8-bit value corresponding to the number of HRPCLK cycles that will
be subtracted from the logic 1 level of the TOP and BOT output signals to provide deadtime between the
two signals.
10.8.5 Frequency Dithering HRP Timebase Registers
The two read/write frequency dithering timebase registers HRPTBH:HRPTBL contain a 16-bit value used
to determine the time base for switching between the two dithering frequencies. The timebase is
calculated from the following formula:
Writes to the high byte (HRPTBH) are stored in a latch until the low byte (HRPTBL) is written. Both
registers are then updated simultaneously. This prevents glitches occurring on the output signal.
108
Address: $0056
Address: HRPTBH — $0057
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Frequency Dithering Timebase (seconds)
Figure 10-14. HRP Timebase Registers (HRPTBH:HRPTBL)
Figure 10-12. HRP Period Registers (HRPPERH:HRPPERL)
Bit 15
TB15
Bit 7
DT7
Bit 7
TB7
P2
0
0
0
0
Figure 10-13. HRP Deadtime Register (HRPDT)
TB14
DT6
TB6
P1
14
0
0
0
0
6
6
Dead Time
HRPTBL — $0058
MC68HC908LB8 Data Sheet, Rev. 1
TB13
DT5
TB5
P0
13
0
5
0
0
5
0
=
------------------------- -
HRPCLK
HRPDT
STEP4
TB12
DT4
TB4
12
0
4
0
0
4
0
=
HRPTBH:HRPTBL
------------------------------------------------- -
STEP3
TB11
DT3
TB3
11
0
1
0
0
3
3
HRPCLK
STEP2
TB10
DT2
TB2
10
0
0
0
0
2
2
STEP1
DT1
TB9
TB1
0
0
0
0
1
9
1
Freescale Semiconductor
STEP0
Bit 0
Bit 8
Bit 0
DT0
TB8
TB0
0
0
0
0
(EQ 10-14)
(EQ 10-15)
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