參數(shù)資料
型號： PSD4235G2
英文描述： Flash In-System-Programmable Peripherals for 16-Bit MCUs(用于16位MCU的閃速在系統(tǒng)可編程外圍芯片)
中文描述： Flash在系統(tǒng)可編程外設的16位微控制器（用于16位微控制器的閃速在系統(tǒng)可編程外圍芯片）
文件頁數(shù)： 36/114頁
文件大?。?/td> 567K
代理商： PSD4235G2
PSD4000 Series
Beta Information
32
The
PSD4000
Functional
Blocks
(cont.)
9.2 PLDs
The PLDs bring programmable logic functionality to the PSD4000. After specifying the
logic for the PLDs in PSDsoft, the logic is programmed into the device and available upon
power-up.
The PSD4000 contains two PLDs: the Decode PLD (DPLD), and the Complex PLD
(CPLD). The PLDs are briefly discussed in the next few paragraphs, and in more detail in
sections 9.2.1 and 9.2.2. Figure 10 shows the configuration of the PLDs.
The DPLD performs address decoding for internal components, such as memory,
registers, and I/O port selects.
The CPLD can be used for logic functions, such as loadable counters and shift registers,
state machines, and encoding and decoding logic. These logic functions can be
constructed using the 16 Output Micro
Cells (OMCs), 24 Input Micro
Cells (IMCs), and
the AND array. The CPLD can also be used to generate external chip selects.
The AND array is used to form product terms. These product terms are specified using
PSDsoft. An Input Bus consisting of 82 signals is connected to the PLDs. The signals are
shown in Table 12.
Input Source
Input Name
Number
of Signals
MCU Address Bus
MCU Control Signals
Reset
Power Down
Port A Input Micro
Cells
Port B Input Micro
Cells
Port C Input Micro
Cells
Port D Inputs
Port F Inputs
Page Register
Micro
Cell A Feedback
Micro
Cell B Feedback
Flash Programming Status Bit
A[15:0]
*
CNTL[2:0]
RST
PDN
PA[7-0]
PB[7-0]
PC[7-0]
PD[3:0]
PF[7:0]
PGR(7:0)
MCELLA.FB[7:0]
MCELLB.FB[7:0]
Rdy/Bsy
16
3
1
1
8
8
8
4
8
8
8
8
1
Table 12. DPLD and CPLD Inputs
NOTE:
The address inputs are A[19:4] in 80C51XA mode.
The Turbo Bit
The PLDs in the PSD4000 can minimize power consumption by switching to standby
when inputs remain unchanged for an extended time of about 70 ns. Setting the Turbo
mode bit to off (Bit 3 of the PMMR0 register) automatically places the PLDs into standby if
no inputs are changing. Turbo-off mode increases propagation delays while reducing
power consumption. Refer to the Power Management Unit section on how to set the Turbo
Bit. Additionally, five bits are available in the PMMR2 register to block MCU control signals
from entering the PLDs. This reduces power consumption and can be used only when
these MCU control signals are not used in PLD logic equations.
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相關代理商/技術參數(shù)
參數(shù)描述
PSD4235G2-70U 功能描述:SPLD - 簡單可編程邏輯器件 5.0V 4M 70ns RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池數(shù)量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風格:Through Hole 封裝 / 箱體:DIP-24
PSD4235G2-90U 功能描述:CPLD - 復雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD4235G2-90UI 功能描述:CPLD - 復雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD4235G2V-12UI 功能描述:CPLD - 復雜可編程邏輯器件 3.3V 4M 120ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD4235G2V-90U 功能描述:CPLD - 復雜可編程邏輯器件 3.3V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
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