參數資料
型號: ST92186B3BK
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32
封裝: PLASTIC, SDIP-32
文件頁數: 104/148頁
文件大?。?/td> 1664K
代理商: ST92186B3BK
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
59/148
ST92186B - TIMING AND CLOCK CONTROLLER (TCC)
5 TIMING AND CLOCK CONTROLLER (TCC)
5.1 FREQUENCY MULTIPLIERS
Two on-chip frequency multipliers generate the
proper frequencies for: the Core/Real time Periph-
erals and the Display related time base.
They follow the same basic scheme based on an
integrated VCO driven by a three state phase
comparator and a charge-pump (1 pin used for off-
chip filtering components; a resistor in series with
a capacitor tied to ground).
For both the Core and the Display frequency mul-
tipliers, a 4 bit programmable feed-back counter
allows the adjustment of the multiplying factor to
the application needs (a 4 MHz crystal is as-
sumed).
Figure 31. Timing and Clock Controller Block Diagram
FOSD
FCPU
SYNCHRONISED CLOCK
TO OSDRAM CONTROLLER
PIXCLK
TO DISPLAY CONTROLLER
FPIXC
SKWEN SKWL [3:0]
4MHz REAL CLOCK
TO IR, DS...
WAIT FOR INTERRUPT
BUS REQUEST
MEMORY WAIT STATE
CPU
CLOCK
CONTROL
PRESCALER
MAIN CLOCK
CONTROLLER
DIV 2
(MODER.5)
FMSL
FREQUENCY
XTAL
OSC
MULTIPLIER
BY 2
DIV
SKDIV2
FML [3:0]
FMEN
DIV
BY 2
DIV
FREQUENCY
MULTIPLIER
PRS [2:0]
FMEN
INTCLK
ADC
OSCOUT
OSCIN
SKEW
CORRECTOR
CPUCLK
(CORE
CLOCK)
CLOCK) TO TIMER,
HSYNC
(PERIPHERAL
FOSD
DIV 2
(MODER.5)
BY 2
DIV
ADC.
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