Section 11 10-Bit PWM
Rev. 7.00 Mar 10, 2005 page 393 of 652
REJ09B0042-0700
Bits 7 to 2—Reserved/Bits 7 to 3—Reserved*
Bits 7 to 2 are reserved; they are always read as 1, and cannot be modified.
Note: * Implemented on H8/38124 Group only.
Bit 2—Output Format Select (PWCRm2)*
This bit selects the format of the output from the PWMm output pin.
This bit is write-only. Reading it always returns 1.
Bit 2
PWCRm2 Description
0 Pulse-division PWM (initial value)
1 Event counter PWM
Note: * Implemented on H8/38124 Group only.
Bits 1 and 0—Clock Select 1 and 0 (PWCRm1, PWCRm0)
Bits 1 and 0 select the clock supplied to the 10-bit PWM. These bits are write-only bits; they are
always read as 1.
Bit 1
PWCRm1
Bit 0
PWCRm0 Description
0 0 The input clock is φ (tφ
*
= 1/φ) (initial value)
The conversion period is 512/φ, with a minimum modulation
width of 1/2φ
0 1 The input clock is φ/2 (tφ
*
= 2/φ)
The conversion period is 1,024/φ, with a minimum
modulation width of 1/φ
1 0 The input clock is φ/4 (tφ
*
= 4/φ)
The conversion period is 2,048/φ, with a minimum
modulation width of 2/φ
1 1 The input clock is φ/8 (tφ
*
= 8/φ)
The conversion period is 4,096/φ, with a minimum
modulation width of 4/φ
Note: * Period of PWM input clock.
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