M16C6K7 Datasheet, PDF (141/285 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Rev.1.0
PWM
Mitsubishi microcomputers
M16C / 6K7 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pulse Width Modulation (PWM) Output Circuit
The M16C/6K group has four PWM output circuits, PWM0 to PWM3, with 14-bit resolution.
They operate independently. When the oscillation frequency XIN= 8MHz, the minimum resolution bit width is
250 ns and the cycle period is 4096 µs. The PWM timing generator supplies a PWM control signal based on
the XIN clock.
The following explanation assumes XIN = 8 MHz.
Data Bus
Set to “1”
at write
bit 7
bit 5
PWM0L register (address 030116)
bit 0
bit 7
bit 0
PWM0H register
(address 030016)
PWM0 latch (14 bits)
MSB
LSB
14
14-bit PWM0 circuit
PWM0
P44 latch
f(XIN)
(8MHz)
PWM0
operation bit
1/2
(4MHz)
PWM0
timing
generator
PWM0 output selection bit
(64 µs period)
PWM0 output
enable bit
(4096 µs period)
P44 direction register
P93 latch
P44/PWM01
P93/DA1/PWM00
Fig.LA-1 PWM blobk diagram(PWM0)
PWM0 output selection bit
PWM0 output enable bit
P93 direction register
140