MCF5282CVM66 Freescale Semiconductor, MCF5282CVM66 Datasheet - Page 359

• Manufacturer Part Number: MCF5282CVM66
• Description: IC MPU 512K 66MHZ 256-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF528xr

Specifications of MCF5282CVM66

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 150
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-MAPBGA
• Controller Family/series: ColdFire
• No. Of I/o's: 150
• Ram Memory Size: 64KB
• Cpu Speed: 66.67MHz
• Embedded Interface Type: CAN, I2C, SPI, UART
• No. Of Pwm Channels: 8
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

18.5.2.3 Watchdog Count Register (WCNTR)
18.5.2.4 Watchdog Service Register (WSR)
When the watchdog timer is enabled, writing 0x5555 and then 0xAAAA to WSR before the watchdog
counter times out prevents a reset. If WSR is not serviced before the timeout, the watchdog timer sends a
signal to the reset controller module that sets the RSR[WDR] bit and asserts a system reset.
Both writes must occur in the order listed before the timeout, but any number of instructions can be
executed between the two writes. However, writing any value other than 0x5555 or 0xAAAA to WSR
resets the servicing sequence, requiring both values to be written to keep the watchdog timer from causing
a reset.
Freescale Semiconductor
Bit(s)
Bit(s)
15–0
15–0
Address
Reset
Reset
Field
Field
R/W
R/W
Name
Name
WM
WC
WC15
WC7
15
7
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Figure 18-4. Watchdog Count Register (WCNTR)
WC14
Watchdog modulus. Contains the modulus that is reloaded into the watchdog counter
by a service sequence. Once written, the WM[15:0] field is not affected by further
writes except in halted mode. Writing to WMR immediately loads the new modulus
value into the watchdog counter. The new value is also used at the next and all
subsequent reloads. Reading WMR returns the value in the modulus register.
Reset initializes the WM[15:0] field to 0xFFFF.
Note: The prescaler counter is reset anytime a new value is loaded into the watchdog
counter and also during reset.
Watchdog count field. Reflects the current value in the watchdog counter. Reading the
16-bit WCNTR with two 8-bit reads is not guaranteed to return a coherent value.
Writing to WCNTR has no effect, and write cycles are terminated normally.
WC6
14
6
Table 18-5. WCNTR Field Descriptions
Table 18-4. WMR Field Descriptions
WC13
WC5
13
IPSBAR + x0014_0004, 0x0014_0005
5
WC12
WC4
12
4
1111_1111
1111_1111
R
R
Description
Description
WC11
WC3
11
3
WC10
WC2
10
2
WC9
WC1
9
1
Watchdog Timer Module
WC8
WC0
8
0
18-5