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HD6433713 Datasheet(PDF) 183 Page - Renesas Technology Corp

Part # HD6433713
Description  single-chip microcontrollers
PDF  324 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433713 Datasheet(HTML) 183 Page - Renesas Technology Corp

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9.2.2 PWM Data Registers U and L (PWDRU, PWDRL)
PWDRU and PWDRL form a 14-bit write-only register, with the upper 6 bits assigned to PWDRU
and the lower 8 bits to PWDRL. The value written to PWDRU and PWDRL gives the total high-
level width of one PWM waveform cycle.
When 14-bit data is written to PWDRU and PWDRL, the register contents are latched in the
PWM waveform generator, updating the PWM waveform generation data. The 14-bit data should
always be written in the following sequence, first to PWDRL and then to PWDRU.
1.
Write the lower 8 bits to PWDRL.
2.
Write the upper 6 bits to PWDRU.
PWDRU and PWDRL are write-only registers. If they are read, all bits read 1.
Upon reset, PWDRU and PWDRL are initialized to H'C000.
Bit
Initial value
Read/Write
7
—
1
—
6
—
1
—
5
PWDRU5
0
W
4
PWDRU4
0
W
3
PWDRU3
0
W
0
PWDRU0
0
W
2
PWDRU2
0
W
1
PWDRU1
0
W
PWDRU
Bit
Initial value
Read/Write
7
PWDRL7
0
W
6
PWDRL6
0
W
5
PWDRL5
0
W
4
PWDRL4
0
W
3
PWDRL3
0
W
0
PWDRL0
0
W
2
PWDRL2
0
W
1
PWDRL1
0
W
PWDRL
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