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| 型號： | PSD834F2 |
| 英文描述： | Flash In-System Programmable (ISP) Peripherals For 8-bit MCUs(用于8位MCUs的閃速ISP外圍) |
| 中文描述： | Flash在系統(tǒng)可編程（ISP）為周邊8位微控制器（用于8位微控制器的閃速的ISP外圍） |
| 文件頁數(shù)： | 60/98頁 |
| 文件大小： | 595K |
| 代理商： | PSD834F2 |
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PSD8XXF2/3/4/5
60/98
RESET TIMING AND DEVICE STATUS AT RESET
Upon Power-up, the PSD8xxF2/3/4/5 requires a
Reset (RESET) pulse of duration t
NLNH-PO
after
V
CC
is steady. During this period,the device loads
internal configurations, clears some of the regis-
ters and sets the Flash memory into Operating
mode. After the rising edge of Reset (RESET), the
PSD8xxF2/3/4/5 remains in the Resetmode for an
additional period,t
OPR
, before the first memory ac-
cess is allowed.
The Flash memoryis reset to the Read mode upon
Power-up.
Sector
Select
CSBOOT0-CSBOOT3) must all be Low, Write
Strobe (WR, CNTL0) High, during Power On Re-
set for maximum security of the data contents and
to remove thepossibility ofa byte being written on
the first edge of Write Strobe (WR, CNTL0). Any
Flash memory Write cycle initiation is prevented
automatically when V
CC
is below V
LKO
.
Warm Reset
Once the device is up and running, thedevice can
be reset with a pulse of a much shorter duration,
t
NLNH
. The same t
OPR
period is needed before the
(FS0-FS7
and
device is operational after warm reset. Figure 31
shows the timing of the Power-up and warm reset.
I/O Pin, Register and PLD Status at Reset
Table 33 shows the I/O pin, register and PLD sta-
tus during Power On Reset, warm reset and Pow-
er-down mode. PLD outputs are always valid
during warm reset, and they are valid in Power On
Reset once the internal PSD8xxF2/3/4/5 Configu-
ration bits are loaded. This loading of PSD8xxF2/
3/4/5 is completed typically long before the V
CC
ramps up to operating level. Once the PLD is ac-
tive, the state of the outputs are determined by the
PSDabel equations.
Reset of Flash Memory Erase and Program
Cycles (on the PSD834Fx)
A Reset (RESET) also resets the internal Flash
memory state machine. During a Flash memory
Program or Erase cycle, Reset (RESET) termi-
nates the cycle and returns the Flash memory to
the Read mode within a period of t
NLNH-A
.
Table 33. Status During Power-On Reset, Warm Reset and Power-down Mode
Note: 1. The SR_cod and PeriphMode bits in the VM Register are always cleared to 0 on Power-On Reset or Warm Reset.
Port Configuration
Power-On Reset
Warm Reset
Power-down Mode
MCU I/O
Input mode
Input mode
Unchanged
PLD Output
Valid after internal PSD
configuration bits are
loaded
Valid
Depends on inputs to PLD
(addresses are blocked in
PD mode)
Address Out
Tri-stated
Tri-stated
Not defined
Data Port
Tri-stated
Tri-stated
Tri-stated
Peripheral I/O
Tri-stated
Tri-stated
Tri-stated
Register
Power-On Reset
Warm Reset
Power-down Mode
PMMR0 and PMMR2
Cleared to 0
Unchanged
Unchanged
Macrocells flip-flop status
Cleared to 0 by internal
Power-On Reset
Depends on .re and .pr
equations
Depends on .re and .pr
equations
VM Register
1
Initialized, based on the
selection in PSDsoft
Configuration menu
Initialized, based on the
selection in PSDsoft
Configuration menu
Unchanged
All other registers
Cleared to 0
Cleared to 0
Unchanged
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD834F2-15M | 制造商:STMicroelectronics 功能描述:Flash In-System Programmable Peripherals 52-Pin PQFP |
| PSD834F2-70J | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 2M 70ns RoHS:否 制造商:Lattice 系列: 存儲類型: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 |
| PSD834F2-70M | 功能描述:SPLD - 簡單可編程邏輯器件 5.0V 2M 70ns 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 |
| PSD834F2-90J | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 2M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型: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 |
| PSD834F2-90JI | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 2M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型: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 |
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