參數(shù)資料
型號: 89C61X2
廠商: NXP Semiconductors N.V.
元件分類: 8位微控制器
英文描述: 80C51 8-bit Flash microcontroller family
中文描述: 80C51的8位閃存微控制器系列
文件頁數(shù): 21/56頁
文件大小: 342K
代理商: 89C61X2
Philips Semiconductors
Product data
P89C60X2/61X2
80C51 8-bit Flash microcontroller family
64KB Flash, 512B/1024B RAM
2003 Sep 11
21
Mode 3 is provided for applications requiring an extra 8-bit timer on
the counter. With Timer 0 in Mode 3, an 80C51 can look like it has
three Timer/Counters. When Timer 0 is in Mode 3, Timer 1 can be
turned on and off by switching it out of and into its own Mode 3, or
can still be used by the serial port as a baud rate generator, or in
fact, in any application not requiring an interrupt.
GATE
C/T
M1
M0
GATE
C/T
M1
M0
BIT
TMOD.3/
TMOD.7
TMOD.2/
TMOD.6
SYMBOL
GATE
FUNCTION
Gating control when set. Timer/Counter “n” is enabled only while “INTn” pin is high and
“TRn” control pin is set. when cleared Timer “n” is enabled whenever “TRn” control bit is set.
Timer or Counter Selector cleared for Timer operation (input from internal system clock.)
Set for Counter operation (input from “Tn” input pin).
C/T
M1
M0
OPERATING
0
0
8048 Timer: “TLn” serves as 5-bit prescaler.
0
1
16-bit Timer/Counter: “THn” and “TLn” are cascaded; there is no prescaler.
1
0
8-bit auto-reload Timer/Counter: “THn” holds a value which is to be reloaded
into “TLn” each time it overflows.
1
1
(Timer 0) TL0 is an 8-bit Timer/Counter controlled by the standard Timer 0 control bits.
TH0 is an 8-bit timer only controlled by Timer 1 control bits.
1
1
(Timer 1) Timer/Counter 1 stopped.
SU01580
TIMER 1
TIMER 0
Not Bit Addressable
TMOD
Address = 89H
Reset Value = 00H
7
6
5
4
3
2
1
0
Figure 3. Timer/Counter 0/1 Mode Control (TMOD) Register
INTn Pin
Timer n
Gate bit
TRn
TLn
(5 Bits)
THn
(8 Bits)
TFn
Interrupt
Control
C/T = 0
C/T = 1
SU01618
OSC
÷
d*
Tn Pin
*d = 6 in 6-clock mode; d = 12 in 12-clock mode.
Figure 4. Timer/Counter 0/1 Mode 0: 13-Bit Timer/Counter
相關(guān)PDF資料
PDF描述
8AGP1 Fast Blow Fuse Series
8T34HA Thyristor Product Catalog
90-030A Industrial Control IC
90-030G Industrial Control IC
90-030S Industrial Control IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
89C664HFA 制造商: 功能描述: 制造商:undefined 功能描述:
89-CBSAP-2.5X3.5X0.8 功能描述:89-CBSAP-2.5X3.5X0.8--89S14--CIR 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽,分體式 高度 - 總:0.800"(20.32mm) 長度 - 總:3.500"(88.90mm) 寬度 - 總:2.500"(63.50mm) 通風(fēng):通風(fēng)孔,按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:5
89-CBSFND-2.25X3.75X0.80 功能描述:89-CBSFND-2.25X3.75X0.80--89S35- 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽,分體式 高度 - 總:0.800"(20.32mm) 長度 - 總:3.750"(95.25mm) 寬度 - 總:2.250"(57.15mm) 通風(fēng):通風(fēng)孔,按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:20
89-CBSFNSV-2.0X7.0X0.8 功能描述:89-CBSFNSV-2.0X7.0X0.8--89S36--C 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽,分體式 高度 - 總:0.800"(20.32mm) 長度 - 總:7.000"(177.80mm) 寬度 - 總:2.000"(50.80mm) 通風(fēng):通風(fēng)孔,按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:20
89-CBSU-24" 功能描述:89-CBSU-24"--89S01--FLAT FENCE S 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽,分體式 長度 - 總:- 通風(fēng):通風(fēng)孔,按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:5