參數(shù)資料
型號(hào)： MC68RHC908JK1
廠商： Motorola, Inc.
英文描述： MC68HC908JK1
中文描述： MC68HC908JK1
文件頁(yè)數(shù)： 76/83頁(yè)
文件大?。?/td> 1923K
代理商： MC68RHC908JK1
System Integration Module (SIM)
Technical Data
MC68H(R)C908JL3
—
Rev. 1.0
76
System Integration Module (SIM)
MOTOROLA
In wait mode, the CPU clocks are inactive. The SIM also produces two
sets of clocks for other modules. Refer to the wait mode subsection of
each module to see if the module is active or inactive in wait mode.
Some modules can be programmed to be active in wait mode.
7.4 Reset and System Initialization
The MCU has these reset sources:
Power-on reset module (POR)
External reset pin (RST)
Computer operating properly module (COP)
Low-voltage inhibit module (LVI)
Illegal opcode
Illegal address
All of these resets produce the vector $FFFE–FFFF ($FEFE–FEFF in
Monitor mode) and assert the internal reset signal (IRST). IRST causes
all registers to be returned to their default values and all modules to be
returned to their reset states.
An internal reset clears the SIM counter (see
7.5 SIM Counter
), but an
external reset does not. Each of the resets sets a corresponding bit in
the reset status register (RSR). (See
7.8 SIM Registers
.)
7.4.1 External Pin Reset
The RST pin circuits include an internal pull-up device. Pulling the
asynchronous RST pin low halts all processing. The PIN bit of the reset
status register (RSR) is set as long as RST is held low for a minimum of
67 2OSCCLK cycles, assuming that the POR was not the source of the
reset. See
Table 7-2
for details.
Figure 7-4
shows the relative timing.
Table 7-2. PIN Bit Set Timing
Reset Type
Number of Cycles Required to Set PIN
POR
4163 (4096 + 64 + 3)
All others
67 (64 + 3)
相關(guān)PDF資料
PDF描述
MC68HRC908JL3MP CA-BAYONET
MC68L11FC0FU3 Technical Summary 8-Bit Microcontroller
MC68L11FC0FU4 Technical Summary 8-Bit Microcontroller
MC68L11F1CFN3 Audio control and Instrumentation Cable; Number of Conductors:10; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Conductor Material:Copper; Jacket Color:Gray RoHS Compliant: Yes
MC68L11F1CPU3 Multiconductor Cable; Number of Conductors:12; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Features:Unshielded RoHS Compliant: Yes
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