MC68HC908MR8CP Freescale Semiconductor, MC68HC908MR8CP Datasheet - Page 179

• Manufacturer Part Number: MC68HC908MR8CP
• Description: IC MCU 8K FLASH 8MHZ PWM 28-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR8CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 12
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

9.12.6 Dead-Time Write-Once Register
9.12.7 PWM Disable Mapping Write-Once Register
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
NOTE:
Figure 9-38. PWM Disable Mapping Write-Once Register (DISMAP)
If PRSC1 and PRSC2 are set to any value other than 0, there is a one
PWM cycle latency time before the PWM pins are driven after the
PWMEN bit is set.
The dead-time write-once register (DEADTM) holds an 8-bit value which
specifies the number of CPU clock cycles to use for the dead-time when
complementary PWM mode is selected. After this register is written for
the first time, it cannot be rewritten unless a RESET occurs. The
dead-time is not affected by changes to the prescaler value.
The PWM disable mapping write-once register (DISMAP) holds an 8-bit
value which determines which PWM pins will be disabled if an external
fault or software disable occur. For a further description of the disable
mapping, see
first time, it cannot be rewritten unless a reset occurs.
Reset:
Reset:
dress:
dress:
Read:
Read:
Write:
Write:
Pulse-Width Modulator for Motor Control (PWMMC)
Ad-
Ad-
Figure 9-37. Dead-Time Write-Once Register (DEADTM)
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Bit 7
Bit 7
Bit 7
Bit 7
1
1
9.7 Fault
Bit 6
Bit 6
6
1
6
1
Protection. After this register is written for the
Bit 5
Bit 5
5
1
5
1
Pulse-Width Modulator for Motor Control (PWMMC)
Bit 4
Bit 4
4
1
4
1
Bit 3
Bit 3
3
1
3
1
Bit 2
Bit 2
2
1
2
1
Control Logic Block
Bit 1
Bit 1
1
1
1
1
Technical Data
Bit 0
Bit 0
Bit 0
Bit 0
1
1
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