參數(shù)資料
型號(hào): P87C654X2
廠商: NXP Semiconductors N.V.
英文描述: Octal Edge-Triggered D-Type Flip-Flops with 3-State Outputs 20-CDIP -55 to 125
中文描述: 80C51的8位單片機(jī)系列16kB的檢察官辦公室/光盤,256B的RAM,低電壓(2.7至5.5 V),低功耗,高速(三十三分之三十〇兆赫)
文件頁(yè)數(shù): 17/88頁(yè)
文件大?。?/td> 497K
代理商: P87C654X2
Philips Semiconductors
Product data
P83C654X2/P87C654X2
80C51 8-bit microcontroller family
16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
2004 Apr 20
17
Table 3.
Timer 2 Operating Modes
RCLK + TCLK
CP/RL2
TR2
MODE
0
0
1
16-bit Auto-reload
0
1
1
16-bit Capture
1
X
1
Baud rate generator
X
X
0
(off)
OSC
÷
n*
C/T2 = 0
C/T2 = 1
TR2
Control
TL2
(8 BITS)
TH2
(8 BITS)
TF2
RCAP2L
RCAP2H
EXEN2
Control
EXF2
Timer 2
Interrupt
T2EX Pin
Transition
Detector
T2 Pin
Capture
SU01252
* n = 6 in 6-clock mode, or 12 in 12-clock mode.
Figure 8. Timer 2 in Capture Mode
Not Bit Addressable
Symbol
Function
Not implemented, reserved for future use.*
T2OE
Timer 2 Output Enable bit.
DCEN
Down Count Enable bit. When set, this allows Timer 2 to be configured as an up/down counter.
T2OE
DCEN
SU00729
7
6
5
4
3
2
1
0
*
User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features.
In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is
indeterminate.
Bit
T2MOD
Address = 0C9H
Reset Value = XXXX XX00B
Figure 9. Timer 2 Mode (T2MOD) Control Register
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