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3886 Datasheet(PDF) 63 Page - Renesas Technology Corp

Part # 3886
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  380 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

3886 Datasheet(HTML) 63 Page - Renesas Technology Corp

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HARDWARE
1-38
3886 Group User’s Manual
Fig. 33 14-bit PWM timing (PWM0)
FUNCTIONAL DESCRIPTION
6A
6A6A6A
6A6B6A6A6A
6A
6A6A6A
6A
6B6B6B6B6B6B6B6B
6B
6B6B6B
6B
5
5
5
5
5
5
5
5
5
5
5
5
5
5
6A
6A
6B
6B
6B
6A
6B
6B
6B
6A
6B
6B
6B
6A
6A
6A
6A
6A
6A
6A
6A
6A
6A
6A
6A
6A
6A
4
3
4
4
3
4
4
3
4
6B
6A
69
68
67
02
01
6A
69
68
67
02
01
02
01
00
FF
FE
FD
97
96
95
02
01
00
FC
FF
FE
FD
97
96
95
FC
ADD
ADD
165316
1A9316
1AA416
1AA416
1EE416
1EF516
T = 4096
µs
(64 ✕ 64
µs)
t = 64
µs
When bit 7 of PWM0L is 0, transfer
from register to latch is disabled.
1316
A416
2416
3516
7B16
6A16
5916
Data 2416 stored at address 003116
Data 6A16 stored at address 003016
Data 7B16 stored at address 003016
Data 3516 stored at address 003116
Transfer from register to latch
Transfer from register to latch
Bit 7 cleared after transfer
6B16 ·············· 36 times
6A16 ············· 28 times
(107)
(106)
6B16 ·············· 24 times
6A16 ······· 40 times
t = 64
µs
(256 ✕ 0.25
µs)
Minimum resolution bit width
τ = 0.25 µs
H duration length specified by PWM0H
256
τ (64 µs), fixed
The ADD
portions with
additional t are
determined by
PWML.
PWM0H
register
PWM0L
register
PWM0 latch
(14bits)
Example 1
PWM0 output
low-order
6-bit output:
H
L
6A16, 2416
Example 2
PWM0 output
low-order
6-bit output:
H
L
6A16, 1816
PWM output
8-bit
counter
106 ✕ 64 + 24
1
2
B516
106 ✕ 64 + 36
2
·······
·······
·······
·······
·······
·······



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