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參數(shù)資料
| 型號(hào)： | ST62T35B |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, 16-BIT AUTO-RELOAD TIMER, EEPROM, SPI AND UART |
| 中文描述： | 8位檢察官辦公室/存儲(chǔ)器與阿微控制器/ D轉(zhuǎn)換器，16位自動(dòng)重加載定時(shí)器，EEPROM中，SPI和UART |
| 文件頁(yè)數(shù)： | 40/82頁(yè) |
| 文件大?。?/td> | 617K |
| 代理商： | ST62T35B |
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ST62T35B/E35B
TIMER
(Cont’d)
4.2.1 Timer Operating Modes
There are three operating modes, which are se-
lected by the TOUT and DOUT bits (see TSCR
register). These three modes correspond to the
two clocks which can be connected to the 7-bit
prescaler (f
INT
÷
12 or TIMER pin signal), and to
the output mode.
4.2.1.1 Gated Mode
(TOUT = “0”, DOUT = “1”)
In this mode the prescaler is decremented by the
Timer clock input (f
INT
÷
12), but ONLY when the
signal on the TIMER pin is held high (allowing
pulse width measurement). This mode is selected
by clearing the TOUT bit in the TSCR register to
“0” (i.e. as input) and setting the DOUT bit to “1”.
4.2.1.2 Event Counter Mode
(TOUT = “0”, DOUT = “0”)
In this mode, the TIMER pin is the input clock of
the prescaler which is decremented on the rising
edge.
4.2.1.3 Output Mode
(TOUT = “1”, DOUT = data out)
The TIMER pin is connected to the DOUT latch,
hence the Timer prescaler is clocked by the pres-
caler clock input (f
INT
÷
12).
The user can select the desired prescaler division
ratio through the PS2, PS1, PS0 bits. When the
TCR count reaches 0, it sets the TMZ bit in the
TSCR. The TMZ bit can be tested under program
control to perform a timer function whenever it
goes high. The low-to-high TMZ bit transition is
used to latch the DOUT bit of the TSCR and trans-
fer itto the TIMER pin. Thisoperating mode allows
external signal generation on the TIMER pin.
Table 14.Timer Operating Modes
4.2.2 Timer Interrupt
When the counter register decrements to zero
with the ETI (Enable Timer Interrupt) bit set to one,
an interrupt request is generated as described in
the Interrupt Chapter. When the counter decre-
ments to zero, the TMZ bit in the TSCR register is
set to one.
Figure 22. Timer Working Principle
TOUT
0
0
1
1
DOUT
0
1
0
1
Timer Pin
Input
Input
Output
Output
Timer Function
Event Counter
Gated Input
Output “0”
Output “1”
BIT0
BIT1
BIT2
BIT3
BIT6
BIT5
BIT4
CLOCK
7-BIT PRESCALER
8-1 MULTIPLEXER
8-BIT COUNTER
BIT0
BIT1
BIT2
BIT3
BIT4
BIT5
BIT6
BIT7
1
0
2
3
4
5
6
7
PS0
PS1
PS2
VA00186
39
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST62T35BQ6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST62T40BQ6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST62T42BQ6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST62T45BQ6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST62T45Q6 | 制造商:STMicroelectronics 功能描述:8BIT MCU - Bulk |
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