參數(shù)資料
型號: μPD30102
廠商: NEC Corp.
英文描述: 64-/32-BIT Microprocessor(64/32位微處理器)
中文描述: 64-/32-BIT微處理器(64/32位微處理器)
文件頁數(shù): 44/112頁
文件大?。?/td> 639K
代理商: ΜPD30102
μ
PD30102
44
Preliminary Data Sheet
4. INITIALIZATION INTERFACE
This section explains the initialization interface and processor mode. Also explained are reset signal description and
type, dependency of signals and timing, and initialization sequence in the mode the user can select.
Remark
# in a signal name indicates active low.
4.1 Reset Function
The V
R
4102 can be reset in the following five ways. For details, refer to the
V
R
4102 User’s Manual
.
4.1.1 RTC reset
Assert the RTCRST# pin active on power application.
RTC reset does not save the status information at all, and completely initializes the internal status of the processor.
Because the DRAM does not enter the self-refresh mode, the contents of the DRAM after RTC reset are not guaranteed.
After reset, the processor serves as the master of the system bus, the sequence of the cold reset exception is
executed, and accessing the reset vector in the ROM space is started. Because only part of the internal status of the
V
R
4102 is reset, completely initialize the processor in software.
Figure 4-1. RTC Reset
RTCRST# (input)
POWER (input)
MPOWER (output)
ColdReset# (internal)
POWERON (output)
Reset# (internal)
RTC
(internal, 32 kHz)
Undefined
Stable
oscillation
> 600 ms
> 32 ms
350 ms
Stable
oscillation
16 ms
16 MasterClock
Note
Undefined
PLL (internal)
Note
MasterClock is the basic clock in the CPU core.
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