S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
Clock A
Clock A/2, A/4, A/6,....A/512
PCKA2
PCKA1
PCKA0
8-Bit Down
Counter
Count = 1
PCLK0
M
U
X
Clock SA
PCLK1
M
U
X
PCLK2
M
U
X
PCLK3
Clock to
PWM Ch 3
Clock to
PWM Ch 2
Clock to
PWM Ch 1
Load
PWMSCLA
M
U
X
2 4 8 16 32 64 128
DIV 2
Clock B
Clock B/2, B/4, B/6,....B/512
M
U
X
PCLK4
Clock to
PWM Ch 4
M
U
X
8-Bit Down
Counter
Count = 1
Load
PWMSCLB
DIV 2
Clock SB
M
U
X
PCLK5
M
U
X
PCLK6
M
U
X
PCLK7
Clock to
PWM Ch 5
Clock to
PWM Ch 6
Clock to
PWM Ch 7
Prescale
Scale
Clock Select
Figure 19-18. PWM Clock Select Block Diagram
Clock A is used as an input to an 8-bit down counter. This down counter loads a user programmable scale
value from the scale register (PWMSCLA). When the down counter reaches one, a pulse is output and the
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
711
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
M
U
X
Clock to
PWM Ch 0
Divide by
Prescaler Taps:
Bus Clock
PFRZ
Freeze Mode Signal
PWME7-0
PCKB2
PCKB1
PCKB0
