參數(shù)資料
型號(hào)： P89C60X2
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(yè)數(shù)： 28/56頁(yè)
文件大?。?/td> 342K
代理商： P89C60X2
Philips Semiconductors
Product data
P89C60X2/61X2
80C51 8-bit Flash microcontroller family
64KB Flash, 512B/1024B RAM
2003 Sep 11
28
Table 7. Timer 2 Generated Commonly Used
Baud Rates
Baud Rate
Timer 2
12-clk
mode
6-clk
mode
Osc Freq
RCAP2H
RCAP2L
375 K
9.6 K
4.8 K
2.4 K
1.2 K
300
110
300
110
750 K
19.2 K
9.6 K
4.8 K
2.4 K
600
220
600
220
12 MHz
12 MHz
12 MHz
12 MHz
12 MHz
12 MHz
12 MHz
6 MHz
6 MHz
FF
FF
FF
FF
FE
FB
F2
FD
F9
FF
D9
B2
64
C8
1E
AF
8F
57
Summary Of Baud Rate Equations
Timer 2 is in baud rate generating mode. If Timer 2 is being clocked
through pin T2(P1.0) the baud rate is:
Timer 2 Overflow Rate
16
If Timer 2 is being clocked internally, the baud rate is:
Baud Rate
Baud Rate
f
OSC
(RCAP2H,RCAP2L)]]
[n
[65536
Where:
n = 16 in 6-clock mode, 32 in 12-clock mode.
f
OSC
= Oscillator Frequency
To obtain the reload value for RCAP2H and RCAP2L, the above
equation can be rewritten as:
RCAP2H,RCAP2L
65536
f
OSC
Baud Rate
n
Timer/Counter 2 Set-up
Except for the baud rate generator mode, the values given for
T2CON do not include the setting of the TR2 bit. Therefore, bit TR2
must be set, separately, to turn the timer on. See Table 8 for set-up
of Timer 2 as a timer. Also see Table 9 for set-up of Timer 2 as a
counter.
Table 8. Timer 2 as a Timer
T2CON
MODE
INTERNAL
CONTROL
(Note 1)
00H
EXTERNAL
CONTROL
(Note 2)
08H
16-bit Auto-Reload
16-bit Capture
01H
09H
Baud rate generator receive
and transmit same baud rate
Receive only
34H
36H
24H
26H
Transmit only
14H
16H
Table 9. Timer 2 as a Counter
TMOD
MODE
INTERNAL
CONTROL
(Note 1)
02H
EXTERNAL
CONTROL
(Note 2)
0AH
16-bit
Auto-Reload
03H
0BH
NOTES:
1. Capture/reload occurs only on timer/counter overflow.
2. Capture/reload occurs on timer/counter overflow and a 1-to-0
transition on T2EX (P1.1) pin except when Timer 2 is used in the
baud rate generator mode.
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