Motorola MCF5281 用户手册
MOTOROLA
Chapter 9. Clock Module
9-5
Memory Map and Registers
9.5.2
XTAL
This output is an internal oscillator connection to the external crystal.
9.5.3
CLKOUT
This output reflects the internal system clock.
9.5.4
CLKMOD[1:0]
These inputs are used to select the clock mode during chip configuration.
9.5.5
RSTOUT
The RSTOUT pin is asserted by one of the following:
• Internal system reset signal
• FRCRSTOUT bit in the reset control status register (RCR); see Section 28.4.1,
• FRCRSTOUT bit in the reset control status register (RCR); see Section 28.4.1,
9.6
Memory Map and Registers
The clock module programming model consists of these registers:
• Synthesizer control register (SYNCR), which defines clock operation
• Synthesizer status register (SYNSR), which reflects clock status
• Synthesizer status register (SYNSR), which reflects clock status
9.6.1
Module Memory Map
Table 9-3. Clock Module Memory Map
IPSBAR Offset
Register Name
Access
1
1
S = CPU supervisor mode access only.
0x0012_0000
Synthesizer Control Register (SYNCR)
S
0x0012_0002
Synthesizer Status Register (SYNSR)
S