MEC1404 Datasheet, PDF (379/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
FIGURE 27-4:
PWM DUTY CYCLE EQUATION
PWM Duty Cycle = _^---_P^----_W^-----_M^------_C^----_o^---_u^----_n^---_t^--_e^--P-_r^---WO-----_nM^---_T^--C--_i^--_m^-o---ue----n_+---^t--e_P^---r--_W^-O----_Mn^----T--_C^-i--m-_o^---_u^-e---_n^---_t^--_e^---_r^---_O^----_f^---_f^--_T^---_i^--_m^-----_e^---_
The PWMx Counter ON Time Register and PWMx Counter OFF Time Register registers should be accessed as 16-bit
values.
27.11 EC-Only Registers
The registers listed in the EC-Only Register Summary table are for a single instance of the PWM. The addresses of
each register listed in this table are defined as a relative offset to the host “Base Address” defined in the EC-Only Reg-
ister Base Address Table.
TABLE 27-2: EC-ONLY REGISTER BASE ADDRESS TABLE
Block Instance
PWM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
Instance
Number
0
1
2
3
4
5
6
7
Host
EC
EC
EC
EC
EC
EC
EC
EC
Address Space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
32-bit internal
address space
Base Address
0000_5800h
0000_5810h
0000_5820h
0000_5830h
0000_5840h
0000_5850h
0000_5860h
0000_5870h
The Base Address indicates where the first register can be accessed in a particular address space for a block instance.
TABLE 27-3: EC-ONLY REGISTER SUMMARY
Offset
00h
04h
08h
Register Name (Mnemonic)
PWMx Counter ON Time Register
PWMx Counter OFF Time Register
PWMx Configuration Register
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DS00001956D-page 379