MC68332ACFC25 Freescale Semiconductor, MC68332ACFC25 Datasheet - Page 20

• Manufacturer Part Number: MC68332ACFC25
• Description: IC MCU 32BIT 25MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332ACFC25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Type: ROMless
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

SYPCR —System Protection Control Register
3.2.2 System Protection Control Register
SWE — Software Watchdog Enable
SWP — Software Watchdog Prescale
SWT[1:0] — Software Watchdog Timing
HME — Halt Monitor Enable
BME — Bus Monitor External Enable
BMT[1:0] — Bus Monitor Timing
20
RESET:
MOTOROLA
15
The system protection control register controls system monitor functions, software watchdog clock
prescaling, and bus monitor timing. This register can be written only once following power-on or reset,
but can be read at any time.
This bit controls the value of the software watchdog prescaler.
This field selects the divide ratio used to establish software watchdog time-out period. The following ta-
ble gives the ratio for each combination of SWP and SWT bits.
This field selects a bus monitor time-out period as shown in the following table.
0 = Software watchdog disabled
1 = Software watchdog enabled
0 = Software watchdog clock not prescaled
1 = Software watchdog clock prescaled by 512
0 = Disable halt monitor function
1 = Enable halt monitor function
0 = Disable bus monitor function for an internal to external bus cycle.
1 = Enable bus monitor function for an internal to external bus cycle.
NOT USED
SWP
Freescale Semiconductor, Inc.
0
0
0
0
1
1
1
1
For More Information On This Product,
BMT
00
01
10
11
Go to: www.freescale.com
Bus Monitor Time-out Period
8
SWT
64 System Clocks
32 System Clocks
16 System Clocks
00
01
10
11
00
01
10
11
8 System Clocks
SWE
7
1
MODCLK
SWP
6
5
0
SWT
Ratio
2
2
2
2
2
2
2
2
4
0
11
13
15
18
20
22
24
9
HME
3
0
BME
2
0
MC68332TS/D
$YFFA21
MC68332
1
0
BMT
0
0