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P87LPC768FD Datasheet(PDF) 18 Page - NXP Semiconductors

Part # P87LPC768FD
Description  Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D,and Pulse Width Modulator
PDF  64 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P87LPC768FD Datasheet(HTML) 18 Page - NXP Semiconductors

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Philips Semiconductors
Preliminary data
87LPC768
Low power, low price, low pin count (20 pin) microcontroller
with 4 kB OTP 8-bit A/D, Pulse Width Modulator
2001 Aug 06
16
CNSW0: Counter Shadow register 0
Addr:
0D1H
Reset Value:
FFH
76
5
4
3
2
1
0
CNSW7
CNSW6
CNSW5
CNSW4
CNSW3
CNSW2
CNSW1
CNSW0
CNSW1: Counter Shadow register 1
Addr:
0D2H
Reset Value:
FFH
76
5
4
3
2
1
0
Unused
Unused
Unused
Unused
Unused
Unused
CNSW9
CNSW8
The word “Shadow” in the above refers to the fact that writes are not
into the register that controls the counter; rather they are into a
holding register. As described below the transfer of data from this
holding register, into the register which contains the actual reload
value, is controlled by the user’s program.
INTERNAL BUS
10 BIT SHADOW
REGISTER
10 BIT COUNTER
REGISTER
10 BIT SHADOW
REGISTER
10 BIT COMPARE
REGISTER
10 BIT SHADOW
REGISTER
10 BIT COMPARE
REGISTER
10 BIT SHADOW
REGISTER
10 BIT COMPARE
REGISTER
10 BIT SHADOW
REGISTER
10 BIT COMPARE
REGISTER
10 BIT COUNTER
A>B
A>B
A>B
A>B
RUN
XFER
BRAKE
BKCH
BKPS
BPEN
BKEN
BRAKE CONTROL LOGIC
2:1 MUX
PWM3I
PWM3B
PWM3
2:1 MUX
PWM2I
PWM2B
PWM2
2:1 MUX
PWM1I
PWM1B
PWM1
2:1 MUX
PWM0I
PWM0B
PWM0
A
B
AB
AB
A
B
SU01364
Figure 8. PWM Block Diagram



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