參數(shù)資料
型號(hào)： ST92185
英文描述： 16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
中文描述： 16K/24K/32K光盤HCMOS微控制器屏幕顯示器
文件頁(yè)數(shù)： 81/230頁(yè)
文件大小： 2743K
代理商： ST92185
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81/230
ST92163 - RESET AND CLOCK CONTROL UNIT (RCCU)
5.4 CLOCK CONTROL REGISTERS
MODE REGISTER (MODER)
R235 - Read/Write
System Register
Reset Value: 1110 0000 (E0h)
7
*Note
: This register contains bits which relate to
other functions; these are described in the chapter
dealing with Device Architecture. Only those bits
relating to Clock functions are described here.
Bit 5 =
DIV2
: OSCIN Divided by 2
This bit controls the divide by 2 circuit which oper-
ates on the OSCIN Clock.
0: No division of the OSCIN Clock
1: OSCIN clock is internally divided by 2
Bit 4:2 =
PRS[2:0]
: Clock Prescaling.
These bits define the prescaler value used to pres-
cale CPUCLK from INTCLK. When these three
bits are reset, the CPUCLK is not prescaled, and is
equal to INTCLK; in all other cases, the internal
clock is prescaled by the value of these three bits
plus one.
CLOCK CONTROL REGISTER (CLKCTL)
R240 - Read Write
Register Page: 55
Reset Value: 0000 0000 (00h)
7
Bit 7 =
INT_SEL
: Interrupt Selection
0: Select the external interrupt pin as interrupt
source (Reset state)
1: Select the internal RCCU interrupt (see
Section
5.3.5
)
Bit 6:4 =
Reserved.
Must be kept reset for normal operation.
Bit 3 =
SRESEN
: Software Reset Enable.
0: The HALT instruction turns off the quartz, the
PLL and the CCU
1: A Reset is generated when HALT is executed
Bit 2 =
CKAF_SEL
: Alternate Function Clock Se-
lect.
0: CK_AF clock not selected
1: Select CK_AF clock
Note:
To check if the selection has actually oc-
curred, check that CKAF_ST is set. If no CK_AF
clock is present, the selection will not occur.
Bit 1 =
WFI_CKSEL
: WFI Clock Select.
This bit selects the clock used in Low power WFI
mode if LPOWFI = 1.
0: INTCLK during WFI is CLOCK2/16
1: INTCLK during WFI is CK_AF, providing it is
present. In effect this bit sets CKAF_SEL in WFI
mode
WARNING
: When the CK_AF is selected as Low
Power WFI clock but the XTAL is not turned off
(R242.4 = 0), after exiting from the WFI, CK_AF
will be still selected as system clock. In this case,
reset the R240.2 bit to switch back to the XT.
Bit 0 =
LPOWFI
: Low Power mode during Wait For
Interrupt
0: Low Power mode during WFI disabled. When
WFI is executed, the CPUCLK is stopped and
INTCLK is unchanged
1: The ST9 enters Low Power mode when the WFI
instruction is executed. The clock during this
state depends on WFI_CKSEL
0
-
-
DIV2
PRS2
PRS1
PRS0
-
-
0
INT_S
EL
-
-
-
SRE-
SEN
CKAF_S
EL
WFI_CKS
EL
LPOW
FI
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參數(shù)描述
ST92185B 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
ST92185B1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
ST92185B1BJ1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
ST92185B1BN1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
ST92185B1T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
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