ST92F120JR9Q6 datasheet(103/324 Pages) STMICROELECTRONICS

tên linh kiện	ST92F120JR9Q6

Giải thích chi tiết về linh kiện	8/16-BIT FLASH MCU FAMILY WITH RAM, EEPROM AND J1850 BLPD

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ST92F120 - RESET AND CLOCK CONTROL UNIT (RCCU)

CLOCK CONTROL REGISTERS (Cont’d)

PLL CONFIGURATION REGISTER (PLLCONF)

R246 - Read/Write

Reset Value: xx00x111 (xxh)

Bits 5:4 = MX[1:0]:

PLL Multiplication Factor.

Refer to Table 21 for multiplier settings.

CAUTION: After these bits are modified, take care

that the PLL lock-in time has elapsed before set-

ting the CSU_CKSEL bit in the CLK_FLAG regis-

ter.

Bits 2:0 = DX[2:0]:

PLL output clock divider factor.

Refer to Table 22 for divider settings.

Table 21. PLL Multiplication Factors

Table 22. PLL Divider Factors

Figure 48. RCCU General Timing

MX1

MX0

DX2

DX1

DX0

MX1

MX0

CLOCK2 x

DX2

DX1

DX0

PLL CLOCK/1

PLL CLOCK/2

PLL CLOCK/3

PLL CLOCK/4

PLL CLOCK/5

PLL CLOCK/6

PLL CLOCK/7

111

CLOCK2

(PLL OFF, Reset State)

PLL Multiplier

CLOCK2

INTCLK

Internal

Reset

Clock

PLL switched on by user

TRSPH

PLL Lock-in Time

Exit from RESET

PLL selected by user

Boot ROM execution

User program execution

Reset phase

Internal

Reset

RESET

< 4

µs

VR02113B

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