參數(shù)資料
型號： PT78NR215S
廠商： Texas Instruments, Inc.
元件分類： 開關穩(wěn)壓
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關穩(wěn)壓器
文件頁數(shù)： 22/76頁
文件大小： 896K
代理商： PT78NR215S
Rev.2.02
Jun 19, 2007
page 29 of 73
REJ03B0146-0202
3823 Group
TIMERS
The 3823 group has five timers: timer X, timer Y, timer 1, timer 2,
and timer 3. Timer X and timer Y are 16-bit timers, and timer 1,
timer 2, and timer 3 are 8-bit timers.
All timers are down count timers. When the timer reaches “0016”,
an underflow occurs at the next count pulse and the correspond-
ing timer latch is reloaded into the timer and the count is
continued. When a timer underflows, the interrupt request bit cor-
responding to that timer is set to “1”.
Read and write operation on 16-bit timer must be performed for
both high and low-order bytes. When reading a 16-bit timer, read
the high-order byte first. When writing to a 16-bit timer, write the
low-order byte first. The 16-bit timer cannot perform the correct
operation when reading during the write operation, or when writing
during the read operation.
Fig. 22 Timer block diagram
CNTR0 active
edge switch bit
Timer 1 count source
selection bit
Real time port
control bit “0”
“1”
P55/CNTR1
“0”
f(XIN)/16
(f(
SUB)16 in low-speed mode)
CNTR1 active
edge switch bit
“10”
Timer Y stop
control bit
Falling edge detection
Period
measurement mode
Timer Y
interrupt
request
Pulse width HL continuously measurement mode
Rising edge detection
“00”,“01”,“11”
Timer Y operating
mode bits
Timer X
interrupt
request
Timer X mode register
write signal
P54/CNTR0
Q
T
S
P54 direction register
Pulse output mode
P54 latch
Timer X stop
control bit
“0”
“1”
Timer X write
control bit
Q D
Latch
Q D
Latch
“1”
“0”
“1”
“10”
Timer X operat-
ing mode bits
“00”,“01”,“11”
f(XIN)/16
(f(SUB)/16 in low-speed mode)
Pulse width
measurement
mode
CNTR0 active
edge switch bit
Pulse output
mode
Q
T
S
“0”
P56 direction register
P56 latch
“1”
TOUT output
active edge
switch bit
Timer 2 write
control bit
“0”
“1”
TOUT output
control bit
“1”
P56/TOUT
f(SUB)
Timer 3 count
source selection bit
“0”
“1”
Timer 2
interrupt
request
Timer 3
interrupt
request
Timer 2 count source
selection bit
Timer 1
interrupt
request
Data bus
f(XIN)/16
(f(SUB)/16 in low-speed mode])
f(XIN)/16
(f(SUB)/16 in low-speed mode)
f(XIN)/16(f(SUB)/16 in low-speed mode)
CNTR0
interrupt
request
CNTR1
interrupt
request
Timer Y operating mode bits
“00”,“01”,“10”
“11”
Real time port
control bit “1”
P52 latch
Real time port
control bit “1”
P53 latch
Timer Y (low) (8)
Timer Y (high) (8)
Timer 3 latch (8)
Timer 3 (8)
Timer 1 latch (8)
Timer 1 (8)
Timer 2 latch (8)
Timer 2 (8)
Timer X (low) (8)
Timer X (high) (8)
Timer X (low) latch (8)
Timer X (high) latch (8)
Timer Y (low) latch (8)
Timer Y (high) latch (8)
TOUT output
control bit
“0”
P52
P53
P52 direction register
P53 direction register
P52 data for real time port
P53 data for real time port
f(SUB) is the source oscillation frequency in low-speed mode.
f(SUB) shows the oscillation frequency of XCIN or the on-chip
oscillator.
Internal clock φ is f(SUB)/2 in the low-speed mode.
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參數(shù)描述
PT78NR215V 功能描述:DC/DC轉換器 -15V 10-12W + to - Voltage ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PT78NR252 制造商:未知廠家 制造商全稱:未知廠家 功能描述:-5.2V. 10-12W Plus to Minus Voltage ISR
PT78NR252H 功能描述:DC/DC轉換器 -5.2V 10-12W + to - Voltage ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PT78NR252S 功能描述:DC/DC轉換器 -5.2V 10-12W + to - Voltage ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PT78NR252V 功能描述:DC/DC轉換器 -5.2V 10-12W + to - Voltage ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
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