參數(shù)資料
型號(hào): 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): 18/84頁
文件大?。?/td> 322K
代理商: P87C557E8
1999 Mar 12
18
Philips Semiconductors
Product specification
8-bit microcontroller
P8xC557E8
10.1
Prescaler Frequency Control Register (PWMP)
Reading PWMP gives the current reload value. The actual count of the prescaler cannot be read.
Table 7
Prescaler Frequency Control Register (address FEH)
Table 8
Description of PWMP bits
10.2
Pulse Width Register 0 (PWM0)
Table 9
Pulse width register (address FCH)
Table 10
Description of PWM0 bits
10.3
Pulse Width Register 1 (PWM1)
Table 11
Pulse width register (address FDH)
Table 12
Description of PWM1 bits
7
6
5
4
3
2
1
0
PWMP.7
PWMP.6
PWMP.5
PWMP.4
PWMP.3
PWMP.2
PWMP.1
PWMP.0
BIT
SYMBOL
DESCRIPTION
7 to 0
PWMP.7 to PWMP.0
Prescaler division factor
. The Prescaler division factor = (PWMP) + 1.
7
6
5
4
3
2
1
0
PWM0.7
PWM0.6
PWM0.5
PWM0.4
PWM0.3
PWM0.2
PWM0.1
PWM0.0
BIT
SYMBOL
DESCRIPTION
7 to 0
PWM0.7 to PWM0.0
Pulse width ratio.
7
6
5
4
3
2
1
0
PWM1.7
PWM1.6
PWM1.5
PWM1.4
PWM1.3
PWM1.2
PWM1.1
PWM1.0
BIT
SYMBOL
DESCRIPTION
7 to 0
PWM1.7 to PWM1.0
Pulse width ratio.
LOW/HIGH ratio of PWM0 signals
PWM0
(
)
255
)
----------PWM0
=
LOW/HIGH ratio of PWM1 signals
PWM1
(
)
255
)
----------PWM1
=
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