参数资料
型号: ST7PLITE15BF0B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP20
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-20
文件页数: 58/159页
文件大小: 2855K
代理商: ST7PLITE15BF0B3
ST7LITE1xB
150/159
OPTION BYTES (Cont’d)
OPTION BYTE 1
OPT7 = PLLx4x8 PLL Factor selection.
0: PLLx4
1: PLLx8
OPT6 = PLLOFF PLL disable.
0: PLL enabled
1: PLL disabled (by-passed)
OPT5 = PLL32OFF 32MHz PLL disable.
0: PLL32 enabled
1: PLL32 disabled (by-passed)
OPT4 = OSC RC Oscillator selection
0: RC oscillator on
1: RC oscillator off
Notes:
– 1% RC oscillator available on ST7LITE15B and
ST7LITE19B devices only
– If the RC oscillator is selected, then to improve
clock stability and frequency accuracy, it is rec-
ommended to place a decoupling capacitor, typ-
ically 100nF, between the VDD and VSS pins as
close as possible to the ST7 device.
OPT3:2 = LVD[1:0] Low voltage detection selec-
tion
These option bits enable the LVD block with a se-
lected threshold as shown in Table 26.
Table 26. LVD Threshold Configuration
OPT1 = WDG SW Hardware or Software
Watchdog
This option bit selects the watchdog type.
0: Hardware (watchdog always enabled)
1: Software (watchdog to be enabled by software)
OPT0 = WDG HALT Watchdog Reset on Halt
This option bit determines if a RESET is generated
when entering HALT mode while the Watchdog is
active.
0: No Reset generation when entering Halt mode
1: Reset generation when entering Halt mode
Table 27. List of valid option combinations
Note 1: Configuration available on ST7LITE15B and ST7LITE19B devices only
Note: see Clock Management Block diagram in Figure 14
Configuration
LVD1 LVD0
LVD Off
11
Highest Voltage Threshold (
4.1V)
10
Medium Voltage Threshold (
3.5V)
01
Lowest Voltage Threshold (
2.8V)
00
Operating conditions
Option Bits
VDD range
Clock Source
PLL
Typ fCPU
OSC
PLLOFF
PLLx4x8
2.7V - 3.3V
Internal RC 1%1)
off
1MHz @3.3V
0
1
x4
4MHz @3.3V
0
x8
-
External clock
off
0-4MHz
1
x4
4MHz
1
0
x8
-
3.3V - 5.5V
Internal RC 1% 1)
off
1MHz @5V
0
1
x4
-
x8
8MHz @5V
0
1
External clock
off
0-8MHz
1
x4
-
x8
8 MHz
1
0
1
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