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7220 датащи(PDF) 90 Page - Renesas Technology Corp

номер детали 7220
подробное описание детали  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  303 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7220 датащи(HTML) 90 Page - Renesas Technology Corp

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2-63
7220 Group User’s Manual
2.10 PWM
2.10 PWM
The M37221M6-XXXSP/FP has one 14-bit PWM (pulse width modulator) [DA], and six 8-bit PWM [PWM0–
PWM5].
Table 2.10.1 shows the PWM function performance.
Table 2.10.1 PWM function performance (at oscillation frequency = 8 MHz)
Figure 2.10.1 shows the 14-bit PWM block diagram and Figure 2.10.2 shows the 8-bit PWM block diagram.
Performance
Resolution (bits)
Minimum resolution bit width (
µs)
Repeat cycle (
µs)
14-bit PWM [DA]
14
0.25
4096
8-bit PWM
8
4
1024
Inside of
with the others.
1/2
XIN
PWM timing
generating
circuit
14-bit PWM circuit
PN2
PN4
PW1
DA
MSB
DA-H register
(Address : 00CE16)
DA latch
(14 bits)
DA-L register (Note)
(Address : 00CF16)
LSB
8
6
14
6
D-A
Data bus
Selection gate :
PW: PWM output control register 1
PN: PWM output control register 2
PW0
b7
b0
Connected to
black side when
reset.
Pass gate
Note: The DA-L register also functions as the low-order 6 bits of the DA latch.
Fig. 2.10.1 14-bit PWM (DA) block diagram
FUNCTIONAL DESCRIPTION



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