HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 246

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

Bit 7—Output Enable (OE): This bit enables the timer counter and the PWM output.
Bit 7
OE
0
1
Bit 6—Output Select (OS): This bit selects positive or negative logic for the PWM output.
Bit 6
OS
0
1
Bits 5 to 3—Reserved: These bits cannot be modified and are always read as 1.
Bits 2, 1, and 0—Clock Select (CKS2, CKS1, and CKS0): These bits select one of eight clock
sources obtained by dividing the system clock (ø).
Bit 2
CKS2
0
0
0
0
1
1
1
1
From the clock source frequency, the resolution, period, and frequency of the PWM output can be
calculated as follows.
If the ø clock frequency is 10MHz, then the resolution, period, and frequency of the PWM output
for each clock source are given in table12-3.
Description
PWM output is disabled. TCNT is cleared to H'00 and stopped. (Initial value)
PWM output is enabled. TCNT runs.
Description
Positive logic; positive-going PWM pulse, 1 = High
Negative logic; negative-going PWM pulse, 1 = Low
Bit 1
CKS1
0
0
1
1
0
0
1
1
Resolution
PWM period
PWM frequency = 1/PWM period
Bit 0
CKS0
0
1
0
1
0
1
0
1
= 1/clock source frequency
= resolution
Description
ø/2 (Initial value)
ø/8
ø/32
ø/128
ø/256
ø/1024
ø/2048
ø/4096
250
231
(Initial value)