m38039g6hsp Renesas Electronics Corporation., m38039g6hsp Datasheet - Page 57

• Manufacturer Part Number: m38039g6hsp
• Description: Single-chip 8-bit Cmos Microcomputer
• Manufacturer: Renesas Electronics Corporation.

3803 Group (Spec.H QzROM version)
Rev.1.10
REJ03B0166-0110
Fig 47. Structure of PWM control register
Fig 48. PWM output timing when PWM register or PWM prescaler is changed
<Notes>
The PWM starts after the PWM function enable bit is set to enable and “L” level is output from the PWM pin.
The length of this “L” level output is as follows:
--------------- - sec
f X
n
---------------------- - sec
2 × f X
(
+
n
IN
(
1
+
)
1
PWM output
PWM register
write signal
PWM prescaler
write signal
IN
Nov 14, 2005
)
b7
When the contents of the PWM register or PWM prescaler have changed,
the PWM output will change from the next period after the change.
(Count source selection bit = 0, where n is the value set in the prescaler)
(Count source selection bit = 1, where n is the value set in the prescaler)
Page 57 of 91
A
T
(Changes “H” term from “A” to “ B”.)
b0
(Changes PWM period from “T” to “T2”.)
PWM control register
(PWMCON: address 002B
B
PWM function enable bit
Count source selection bit
Not used
(return “0” when read)
0 : PWM disabled
1 : PWM enabled
0 : f(X
1 : f(X
T
IN
IN
) (f(X
)/2 (f(X
CIN
CIN
) at low-speed mode)
)/2 at low-speed mode)
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
C
T2
16
)
B
T
=
T2
C