參數(shù)資料
型號(hào): UPSD3253B-40T6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP52
封裝: PLASTIC, TQFP-52
文件頁(yè)數(shù): 54/189頁(yè)
文件大?。?/td> 1638K
代理商: UPSD3253B-40T6
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Obsolete
Product(s)
- Obsolete
Product(s)
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Power management
Other power-saving options
The PSD module offers other reduced power saving options that are independent of the
Power-down mode. Except for the PSD Chip Select Input (CSI, PD2) features, they are
enabled by setting bits in PMMR0 and PMMR2.
Figure 68.
Enable Power-down flowchart
25.1
PLD power management
The power and speed of the PLDs are controlled by the Turbo Bit (Bit 3) in PMMR0. By
setting the bit to '1,' the Turbo mode is off and the PLDs consume the specified Standby
current when the inputs are not switching for an extended time of 70 ns. The propagation
delay time is increased by 10 ns (for a 5 V device) after the Turbo Bit is set to '1' (turned off)
when the inputs change at a composite frequency of less than 15MHz. When the Turbo Bit
is reset to '0' (turned on), the PLDs run at full power and speed. The Turbo Bit affects the
PLD’s DC power, AC power, and propagation delay. When the Turbo mode is off, the
UPSD325xx devices’ input clock frequency is reduced by 5 MHz from the maximum rated
clock frequency.
Blocking MCU control signals with the bits of PMMR2 can further reduce PLD AC power
consumption.
Table 102.
Power-down mode’s effect on ports
Port Function
Pin Level
MCU I/O
No Change
PLD Out
No Change
Address Out
Undefined
Peripheral I/O
Tri-State
Enable APD
Set PMMR0 Bit 1 = 1
PSD Module in Power
Down Mode
ALE idle
for 15 CLKIN
clocks?
RESET
Yes
No
OPTIONAL
Disable desired inputs to PLD
by setting PMMR0 bits 4 and 5
and PMMR2 bits 2 through 6.
AI06609
相關(guān)PDF資料
PDF描述
UPSD3334D-40U6 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP80
US1001FL 0.5 A, 100 V, SILICON, SIGNAL DIODE
US1A-HE3 1 A, 50 V, SILICON, SIGNAL DIODE, DO-214AC
US1B-HE3 1 A, 100 V, SILICON, SIGNAL DIODE, DO-214AC
US1G-HE3 1 A, 400 V, SILICON, SIGNAL DIODE, DO-214AC
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