參數(shù)資料
型號: P87C557E8
廠商: NXP Semiconductors N.V.
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 28/84頁
文件大?。?/td> 322K
代理商: P87C557E8
1999 Mar 12
28
Philips Semiconductors
Product specification
8-bit microcontroller
P8xC557E8
Table 33
Timer 2 prescaler select
T2P1
T2P0
TIMER T2 CLOCK
0
0
1
1
0
1
0
1
clock source
1
2
×
clock source
1
4
×
clock source
1
8
×
clock source
Table 34
Timer 2 mode select
T2MS1 T2MS0
MODE SELECTED
0
0
1
1
0
1
0
1
Timer T2 halted (off)
1
12
×
f
clk
T2 clock source
Test mode; do not use
T2 clock source = pin T2
12.2.2
C
APTURE
C
ONTROL
R
EGISTER
(CTCON)
Table 35
Capture Control Register (address EBH)
Table 36
Description of CTCON bits
12.2.3
I
NTERRUPT
F
LAG
R
EGISTER
(TM2IR)
Table 37
Interrupt flag register (address C8H)
Table 38
Description of TM2IR bits
7
6
5
4
3
2
1
0
CTN3
CTP3
CTN2
CTP2
CTN1
CTP1
CTN0
CTP0
BIT
SYMBOL
DESCRIPTION
7
6
5
4
3
2
1
0
CTN3
CTP3
CTN2
CTP2
CTN1
CTP1
CTN0
CTP0
interrupt triggered on negative edge of CT3I
interrupt triggered on positive edge of CT3I
interrupt triggered on negative edge of CT2I
interrupt triggered on positive edge of CT2I
interrupt triggered on negative edge of CT1I
interrupt triggered on positive edge of CT1I
interrupt triggered on negative edge of CT0I
interrupt triggered on positive edge of CT0I
7
6
5
4
3
2
1
0
T2OV
CMI2
CMI1
CMI0
CTI3
CTI2
CTI1
CTI0
BIT
SYMBOL
DESCRIPTION
7
6
5
4
3
2
1
0
T2OV
CMI2
CMI1
CMI0
CTI3
CTI2
CTI1
CTI0
T2: 16-bit overflow interrupt flag
CM2: interrupt flag
CM1: interrupt flag
CM0: interrupt flag
CT3: interrupt flag
CT2: interrupt flag
CT1: interrupt flag
CT0: interrupt flag
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