mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 423

• Manufacturer Part Number: mcf5307cft90b
• Description: Mcf5307 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

See Section 17.5.5, “Data/Configuration Pins (D[7:0]).” Motorola recommends that the
data pins be driven rather than using a weak pull-up or pull-down resistor. Table 17-1 lists
the encoding of these pins sampled at reset.
18.10.2 Software Watchdog Reset
A software watchdog reset is performed if the executing software does not provide the
correct write data sequence with the enable-control bit set. This reset helps prevent runaway
software or unterminated bus cycles. Figure 18-34 is a functional timing diagram of the
software watchdog reset operation, showing RSTO and bus signal relationships.
D[6:5]
D[3:2]
D[1:0]
Pin
D7
D4
Freescale Semiconductor, Inc.
Auto-Acknowledge Configuration (AA_CONFIG)
Port Size Configuration (PS_CONFIG[1:0])
Address Configuration (ADDR_CONFIG/D4)
Frequency of CLKIN (FREQ[1:0])
Ratio of BCLKO/Processor Clock {DIVIDE[1:0])
Table 18-12. Data Pin Configuration
For More Information On This Product,
Chapter 18. Bus Operation
Go to: www.freescale.com
Function
Reset Operation
18-35