參數(shù)資料
型號(hào): EB402
英文描述: EB402 Evaluation Board user's guide 7/01
中文描述: EB402評(píng)估板用戶指南7月1日
文件頁(yè)數(shù): 18/84頁(yè)
文件大小: 1014K
代理商: EB402
Clock and Control Signals
3-3
3.1 Clock and Control Signals
This section describes LSI402ZX clock and control signals. Not all signals
are described. Refer to LSI402ZX Digital Signal Processor User’s Guide
for complete information about all LSI402ZX clock and control signals.
These clock and control signals are described in this section:
CLKIN (Master Clock Input)
CLKOUT (DSP Clock Output)
PLLBYPASS (PLL Bypass)
PLLSEL[3:0] (PLL Multiplier Select)
RSTN (Device Reset)
IBOOT (Memory Map Select)
INT[4:0] (External Hardware Interrupts)
NMI (Nonmaskable Interrupt)
HALT (Halt Processor Clock)
3.1.1 CLKIN (Master Clock Input)
CLKIN is the Master Clock Input to the LSI402ZX. The setting of jumper
JP1 determines the clock’s source.
On-Board Oscillator – The EB402 provides an on-board 10 MHz
oscillator to clock the LSI402ZX. Connect pins 1–2 of JP1 to select the
on-board oscillator.
External Oscillator – The EB402 also allows an external oscillator to
clock the LSI402ZX. To use an external oscillator, connect pins 2–3 of
JP1, and connect an external oscillator to BNC connector J4.
3.1.2 CLKOUT (DSP Clock Output)
This signal is the DSP Clock output (buffered). The CLKOUT signal is
routed to BNC connector J1. The source of CLKOUT depends on the
level of the PLLBYPASS signal, which is controlled by jumper JP12.
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