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| 型號(hào)： | PSD834F2V |
| 英文描述： | Flash PSD, 3.3V Supply, for 8-bit MCUs 2 Mbit + 256 Kbit Dual Flash Memories and 64 Kbit SRAM(2M位+256K位雙路閃速存儲(chǔ)器和64K位靜態(tài)RAM,閃速PSD,3.3V電源,用于8位MCU.) |
| 中文描述： | 閃光私營(yíng)部門，3.3V電源，為8位微控制器2兆256千位雙閃存和64千位的SRAM（200萬(wàn)位256K位雙路閃速存儲(chǔ)器和64K的位靜態(tài)內(nèi)存，閃速私營(yíng)部門，3.3V的電源，用于8位微控制器。） |
| 文件頁(yè)數(shù)： | 56/89頁(yè) |
| 文件大?。?/td> | 522K |
| 代理商： | PSD834F2V |
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PSD834F2V
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Figure 29. APD Unit
Automatic Power-down (APD) Unit and Power-
down Mode.
The APD Unit, shown in Figure 29,
puts the PSD into Power-down mode by monitor-
ing the activity of Address Strobe (ALE/AS, PD0).
If the APD Unit is enabled, as soon as activity on
Address Strobe (ALE/AS, PD0) stops, a four bit
counter starts counting. If Address Strobe (ALE/
AS, PD0) remains inactive for fifteen clock periods
of CLKIN (PD1), Power-down (PDN) goes High,
and the PSD enters Power-down mode, as dis-
cussed next.
Table 27. Power-down Mode’s Effect on Ports
Power-down Mode.
By default, if you enable the
APD Unit, Power-down mode is automatically en-
abled. Thedevice enters Power-down mode if Ad-
dress Strobe (ALE/AS, PD0) remains inactive for
fifteen periods of CLKIN (PD1).
The following should be kept in mind when the
PSD is in Power-down mode:
I
If Address Strobe (ALE/AS, PD0) starts pulsing
again, the PSD returns to normal Operating
mode. The PSD also returns to normal
Operating mode if either PSD Chip Select Input
(CSI, PD2)isLow orthe Reset(RESET) input is
High.
I
The MCU address/data bus is blocked from all
memory and PLDs.
I
Various signals can be blocked (prior to Power-
down mode) from entering the PLDs by setting
the appropriate bits in the PMMR registers. The
blocked signals include MCU control signals
and the common CLKIN (PD1). Note that
blocking CLKIN (PD1) from the PLDs does not
block CLKIN (PD1) from the APD Unit.
I
All PSD memories enter Standby mode and are
drawing standbycurrent.However, thePLD and
I/O ports blocks do not go into Standby Mode
because you don’t want to have to wait for the
logic and I/O to “wake-up” before their outputs
can change. See Table 27 for Power-down
mode effects on PSD ports.
I
Typical standby current is of the order of
microamperes. These standby current values
assume thatthere arenotransitions onanyPLD
input.
Table 28. PSD Timing and Stand-by Current during Power-down Mode
Note: 1. Power-down does not affect the operation of the PLD. The PLD operation in this mode is based only on the Turbo bit.
APD EN
PMMR0 BIT 1=1
ALE
RESET
CSI
CLKIN
TRANSITION
DETECTION
EDGE
DETECT
APD
COUNTER
POWER DOWN
(PDN)
SELECT
DISABLE BUS
INTERFACE
EEPROM SELECT
FLASH SELECT
SRAM SELECT
PD
CLR
PD
DISABLE
FLASH/EEPROM/SRAM
PLD
AI02891
Port Function
Pin Level
MCU I/O
No Change
PLD Out
No Change
Address Out
Undefined
Data Port
Tri-State
Peripheral I/O
Tri-State
Mode
PLD Propagation Delay
Memory Access
Time
Access Recovery Time to
Normal Access
Typical Stand-by
Current
Power-down
Normal t
PD
(Note
1
)
No Access
t
LVDV
25
μ
A (Note
2
)
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相關(guān)代理商/技術(shù)參數(shù) |
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| PSD834F2V-15J | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 3.0V 2M 150ns RoHS:否 制造商:Lattice 系列: 存儲(chǔ)類型:EEPROM 大電池?cái)?shù)量:128 最大工作頻率:333 MHz 延遲時(shí)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 |
| PSD834F2V-15M | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 3.0V 2M 150ns RoHS:否 制造商:Lattice 系列: 存儲(chǔ)類型:EEPROM 大電池?cái)?shù)量:128 最大工作頻率:333 MHz 延遲時(shí)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 |
| PSD834F2V-20JI | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 3.0V 2M 200ns RoHS:否 制造商:Lattice 系列: 存儲(chǔ)類型:EEPROM 大電池?cái)?shù)量:128 最大工作頻率:333 MHz 延遲時(shí)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 |
| PSD834F2V-20MI | 功能描述:SPLD - 簡(jiǎn)單可編程邏輯器件 3.0V 2M 200ns RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時(shí)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(fēng)格:Through Hole 封裝 / 箱體:DIP-24 |
| PSD835G2-70U | 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 5.0V 4M 70ns RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray |
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