9532 データシートの表示（PDF） - NXP Semiconductors.
部品番号
コンポーネント説明
メーカー
9532 Datasheet PDF : 29 Pages
| |||
NXP Semiconductors
PCA9532
16-bit I2C-bus LED dimmer
6.3.3 PCS0 - Frequency Prescaler 0
PSC0 is used to program the period of the PWM output.
The period of BLINK0 = (PSC0 + 1) / 152.
Table 6.
Bit
Symbol
Default
PSC0 - Frequency Prescaler 0 register description
7
6
5
4
3
2
PSC0[7] PSC0[6] PSC0[5] PSC0[4] PSC0[3] PSC0[2]
0
0
0
0
0
0
1
PSC0[1]
0
0
PSC0[0]
0
6.3.4 PWM0 - Pulse Width Modulation 0
The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED on)
when the count is less than the value in PWM0 and HIGH (LED off) when it is greater. If
PWM0 is programmed with 00h, then the PWM0 output is always HIGH (LED off).
The duty cycle of BLINK0 = PWM0 / 256.
Table 7.
Bit
Symbol
Default
PWM0 - Pulse Width Modulation 0 register description
7
6
5
4
3
2
PWM0 PWM0 PWM0 PWM0 PWM0 PWM0
[7]
[6]
[5]
[4]
[3]
[2]
1
0
0
0
0
0
1
PWM0
[1]
0
0
PWM0
[0]
0
6.3.5 PCS1 - Frequency Prescaler 1
PSC1 is used to program the period of the PWM output.
The period of BLINK1 = (PSC1 + 1) / 152.
Table 8.
Bit
Symbol
Default
PSC1 - Frequency Prescaler 1 register description
7
6
5
4
3
2
PSC1[7] PSC1[6] PSC1[5] PSC1[4] PSC1[3] PSC1[2]
0
0
0
0
0
0
1
PSC1[1]
0
0
PSC1[0]
0
6.3.6 PWM1 - Pulse Width Modulation 1
The PWM1 register determines the duty cycle of BLINK1. The outputs are LOW (LED on)
when the count is less than the value in PWM1 and HIGH (LED off) when it is greater. If
PWM1 is programmed with 00h, then the PWM1 output is always HIGH (LED off).
The duty cycle of BLINK1 = PWM1 / 256.
Table 9.
Bit
Symbol
Default
PWM1 - Pulse Width Modulation 1 register description
7
6
5
4
3
2
PWM1 PWM1 PWM1 PWM1 PWM1 PWM1
[7]
[6]
[5]
[4]
[3]
[2]
1
0
0
0
0
0
1
PWM1
[1]
0
0
PWM1
[0]
0
PCA9532_4
Product data sheet
Rev. 04 — 17 March 2009
© NXP B.V. 2009. All rights reserved.
7 of 29
Share Link: 