MC68331CEH25 Freescale Semiconductor, MC68331CEH25 Datasheet - Page 80

• Manufacturer Part Number: MC68331CEH25
• Description: IC MCU 32BIT 25MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68331CEH25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Controller Family/series: 68K
• No. Of I/o's: 18
• Cpu Speed: 25MHz
• No. Of Timers: 1
• Embedded Interface Type: QSPI, SCI, UART
• No. Of Pwm Channels: 2
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Data Ram Size: 80 B
• Interface Type: QSPI, SCI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

FOC[5:1] — Force Output Compare
FPWMA — Force PWMA Value
FPWMB — Force PWMB Value
PPROUT — PWM Clock Output Enable
PPR[2:0] — PWM Prescaler/PCLK Select
SFA — PWMA Slow/Fast Select
SFB — PWMB Slow/Fast Select
F1A — Force Logic Level One on PWMA
80
PPR[2:0]
FOC[5:1] correspond to OC[5:1].
This field selects one of seven prescaler taps, or PCLK, to be PWMCNT input.
The following table shows the effects of SF settings on PWM frequency for a 16.78-MHz system clock
and a 20.97-MHz system clock.
000
001
010
011
100
101
110
111
0 = Has no meaning
1 = Causes pin action programmed for corresponding OC pin, but the OC flag is not set.
0 = Normal PWMA operation
1 = The value of F1A is driven out on the PWMA pin, regardless of the state of PPROUT.
0 = Normal PWMB operation
1 = The value of F1B is driven out on the PWMB pin.
0 = Normal PWM operation on PWMA
1 = TCNT clock driven out PWMA pin
0 = PWMA period is 256 PWMCNT increments long.
1 = PWMA period is 32768 PWMCNT increments long.
0 = PWMB period is 256 PWMCNT increments long.
1 = PWMB period is 32768 PWMCNT increments long.
0 = Force logic level zero output on PWMA pin
1 = Force logic level one output on PWMA pin
Div 16 = 1.05 MHz
Div 128 = 131 kHz
Div 2 = 8.39 MHz
Div 4 = 4.19 MHz
Div 8 = 2.10 MHz
Div 32 = 524 kHz
Div 64 = 262 kHz
16.78 MHz
PCLK
Prescaler Tap
Freescale Semiconductor, Inc.
For More Information On This Product,
Div 16 = 1.31 MHz
Div 128 = 164 kHz
Div 2 = 10.5 MHz
Div 4 = 5.25 MHz
Div 8 = 2.62 MHz
Div 32 = 655 kHz
Div 64 = 328 kHz
PPR[2:0]
20.97 MHz
000
001
010
011
100
101
110
111
PCLK
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Divide-By Factor
16.78 MHz
PCLK/256
System Clock
32.8 kHz
16.4 kHz
8.19 kHz
4.09 kHz
2.05 kHz
1.02 kHz
512 Hz
PCLK
128
16
32
64
2
4
8
SFA/B = 0
20.97 MHz
PCLK/256
20.5 kHz
10.2 kHz
5.15 kHz
2.56 kHz
1.28 kHz
41 kHz
641 Hz
PCLK/32768
16.78 MHz
64.0 Hz
32.0 Hz
16.0 Hz
256 Hz
128 Hz
8.0 Hz
4.0 Hz
SFA/B = 1
MC68331TS/D
PCLK/32768
20.97 MHz
80.0 Hz
40.0 Hz
20.0 Hz
10.0 Hz
320 Hz
160 Hz
5.0 Hz