参数资料
型号: DSPB56362AG120
厂商: Freescale Semiconductor
文件页数: 13/152页
文件大小: 0K
描述: IC DSP 24BIT AUD 120MHZ 144-LQFP
标准包装: 60
系列: DSP56K/Symphony
类型: 音频处理器
接口: 主机接口,I²C,SAI,SPI
时钟速率: 120MHz
非易失内存: ROM(126 kB)
芯片上RAM: 42kB
电压 - 输入/输出: 3.30V
电压 - 核心: 3.30V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
External Memory Expansion Port (Port A)
DSP56362 Technical Data, Rev. 4
Freescale Semiconductor
2-5
2.5
External Memory Expansion Port (Port A)
When the DSP56362 enters a low-power standby mode (stop or wait), it releases bus mastership and
tri-states the relevant port A signals: A0–A17, D0–D23, AA0/RAS0–AA3/RAS3, RD, WR, BB, CAS.
2.5.1
External Address Bus
2.5.2
External Data Bus
PCAP
Input
PLL Capacitor—PCAP is an input connecting an off-chip capacitor to the PLL
filter. Connect one capacitor terminal to PCAP and the other terminal to VCCP.
If the PLL is not used, PCAP may be tied to VCC, GND, or left floating.
PINIT/NMI
Input
PLL Initial/Non maskable Interrupt—During assertion of RESET, the value of
PINIT/NMI is written into the PLL Enable (PEN) bit of the PLL control register,
determining whether the PLL is enabled or disabled. After RESET deassertion
and during normal instruction processing, the PINIT/NMI Schmitt-trigger input
is a negative-edge-triggered non maskable interrupt (NMI) request internally
synchronized to CLKOUT.
PINIT/NMI cannot tolerate 5 V.
Table 2-5 External Address Bus Signals
Signal Name
Type
State during Reset
Signal Description
A0–A17
Output
Tri-Stated
Address Bus—When the DSP is the bus master, A0–A17 are
active-high outputs that specify the address for external program and
data memory accesses. Otherwise, the signals are tri-stated. To
minimize power dissipation, A0–A17 do not change state when
external memory spaces are not being accessed.
Table 2-6 External Data Bus Signals
Signal Name
Type
State during Reset
Signal Description
D0–D23
Input/Output
Tri-Stated
Data Bus—When the DSP is the bus master, D0–D23 are active-high,
bidirectional input/outputs that provide the bidirectional data bus for
external program and data memory accesses. Otherwise, D0–D23 are
tri-stated.
Table 2-4 Clock and PLL Signals (continued)
Signal Name
Type
State during Reset
Signal Description
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