参数资料
型号: DSP56311VF150B1
厂商: Freescale Semiconductor
文件页数: 78/96页
文件大小: 0K
描述: IC DSP 24BIT 150MHZ 196-BGA
标准包装: 630
系列: DSP56K/Symphony
类型: 定点
接口: 主机接口,SSI,SCI
时钟速率: 150MHz
非易失内存: ROM(576 B)
芯片上RAM: 384kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.80V
工作温度: -40°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 196-LBGA
供应商设备封装: 196-MAPBGA(15x15)
包装: 托盘
DSP56311 Technical Data, Rev. 8
1-4
Freescale Semiconductor
Signals/Connections
1.4 PLL
1.5 External Memory Expansion Port (Port A)
Note:
When the DSP56311 enters a low-power standby mode (stop or wait), it releases bus mastership and tri-
states the relevant Port A signals: A[0–17], D[0–23], AA[03], RD, WR, BB.
1.5.1
External Address Bus
Table 1-5.
Phase-Locked Loop Signals
Signal Name
Type
State During
Reset
Signal Description
CLKOUT
Output
Chip-driven
Clock Output—Provides an output clock synchronized to the internal core
clock phase.
If the PLL is enabled and both the multiplication and division factors equal one,
then CLKOUT is also synchronized to EXTAL.
If the PLL is disabled, the CLKOUT frequency is half the frequency of EXTAL.
Note: At operating frequencies above 100 MHz, this signal produces a low-
amplitude waveform that is not usable externally by other devices. Above 100
MHz, you can use the asynchronous bus arbitration option that is enabled by
the Asynchronous Bus Arbitration Enable (ABE) bit in the Operating Mode
Register. When set, the DSP enters the Asynchronous Arbitration mode,
which eliminates the BB and BG set-up and hold time requirements with
respect to CLKOUT.
PCAP
Input
PLL Capacitor—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 can be tied to VCC, GND, or left floating.
PINIT
NMI
Input
PLL Initial—During assertion of RESET, the value of PINIT is written into the
PLL enable (PEN) bit of the PLL control (PCTL) register, determining whether
the PLL is enabled or disabled.
Nonmaskable Interrupt—After RESET deassertion and during normal
instruction processing, this Schmitt-trigger input is the negative-edge-triggered
NMI request internally synchronized to CLKOUT.
Table 1-6.
External Address Bus Signals
Signal Name
Type
State During
Reset, Stop,
or Wait
Signal Description
A[0–17]
Output
Tri-stated
Address Bus—When the DSP is the bus master, A[0–17] 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,
A[0–17] do not change state when external memory spaces are not being
accessed.
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