ST92185B STMicroelectronics, ST92185B Datasheet - Page 64

• Manufacturer Part Number: ST92185B
• Description: 16k/24k/32k Rom Hcmos Mcu With On-screen-display
• Manufacturer: STMicroelectronics

ST92185B - TIMING AND CLOCK CONTROLLER
Figure 34. Programming the MCCR
Figure 35. Programming the SKCCR, PXCCR
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Start the PLL by setting
Start the PLL by setting
Set the PLL frequency
Set the PLL frequency
Validate PLL is fed to
Validate PLL as Main
TDSRAM and OSD
Wait for Clock
Wait for Clock
SKWEN = 1
Stabilization
Stabilization
SKW (3:0)
CPU Clock
FMEN = 1
FML (3:0)
Example:
spp
ld SKCCR, #04h ;Set SKW bits to the value needed
or SKCCR, #80h ;Starts the PLL
or PXCCR, #80h ;PLL is fed as DOTCK to the TDSRAM & OSDPLL
Example:
spp
ld MCCR, #04h ;Set FML bits to the value needed e.g. 10 MHz
or MCCR, #80h ;Starts the PLL
or MCCR, #40h ;Validate the PLL as the main CPU Clock
Wait for stabilization time
Wait for stabilization time
#27h ;Set the page
#27h ;Set the page