MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 92

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

5.4 System Protection
5.4.1 Reset Status
5.4.2 Bus Monitor
5-14
MOTOROLA
The system protection block preserves reset status, monitors internal activity, and pro-
vides periodic interrupt generation. Figure 5-6 is a block diagram of the submodule.
The reset status register (RSR) latches internal MCU status during reset. Refer to
5.7.10 Reset Status Register for more information.
The internal bus monitor checks data and size acknowledge (DSACK) or autovector
(AVEC) signal response times during normal bus cycles. The monitor asserts the in-
ternal bus error (BERR) signal when the response time is excessively long.
DSACK and AVEC response times are measured in clock cycles. Maximum allowable
response time can be selected by setting the bus monitor timing (BMT[1:0]) field in the
system protection control register (SYPCR). Table 5-4 shows the periods allowed.
CLOCK
2
9
PRESCALER
Figure 5-6 System Protection Block
SYSTEM INTEGRATION MODULE
SPURIOUS INTERRUPT MONITOR
MODULE CONFIGURATION
RESET STATUS
HALT MONITOR
BUS MONITOR
AND TEST
SOFTWARE WATCHDOG TIMER
PERIODIC INTERRUPT TIMER
RESET REQUEST
BERR
RESET REQUEST
IRQ[7:1]
USER’S MANUAL
MC68336/376
SYS PROTECT BLOCK