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参数资料
| 型号： | ST72141K2B3/XXX |
| 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, PDIP32 |
| 封装： | 0.400 INCH, PLASTIC, SDIP-32 |
| 文件页数： | 67/133页 |
| 文件大小： | 2615K |
| 代理商： | ST72141K2B3/XXX |
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Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
39/133
MISCELLANEOUS REGISTER (Cont’d)
7.4 Miscellaneous Register Description
MISCELLANEOUS REGISTER (MISCR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7 = XT16 MTC and SPI clock selection
This bit is set and cleared by software. The maxi-
mum allowed frequency is 4MHz.
0: MTC and SPI clock supplied with fOSC/2
1: MTC and SPI clock supplied with fOSC/4
Bit 6 = SSM SS mode selection
This bit is set and cleared by software.
0: Normal mode - the level of the SPI SS signal is
the external SS pin.
1: I/O mode, the level of the SPI SS signal is read
from the SSI bit.
Bit 5 = SSI SS internal mode
This bit replaces the SS pin of the SPI when the
SSM bit is set to 1. (see SPI description). It is set
and cleared by software.
Bits 4:3 = IS1[1:0] EI1 sensitivity
The interrupt sensitivity defined using the IS1[1:0]
bits combination is applied to the EI1 external in-
terrupts. These two bits can be written only when
the I bit of the CC register is set to 1 (interrupt
masked).
EI1: Port B
Bits 2:1 = IS0[1:0] EI0 sensitivity
The interrupt sensitivity defined using the IS0[1:0]
bits combination is applied to the EI1 external in-
terrupts. These two bits can be written only when
the I bit of the CC register is set to 1 (interrupt
masked).
EI0: Port A
Bit 0 = SMS Slow mode select
This bit is set and cleared by software.
0: Normal mode. fCPU = fOSC / 2
1: Slow mode. fCPU = fOSC / 32
See sections on low power consumption mode
and MCC for more details.
Table 10. Miscellaneous Register Map and Reset Values
70
XT16 SSM
SSI
IS11
IS10
IS01
IS00
SMS
IS11 IS10
External Interrupt Sensitivity
0
Falling edge & low level
0
1
Rising edge only
1
0
Falling edge only
1
Rising and falling edge
IS01 IS00
External Interrupt Sensitivity
0
Falling edge & low level
0
1
Rising edge only
1
0
Falling edge only
1
Rising and falling edge
Address
(Hex.)
Register
Label
765
4321
0
0020h
MISCR
Reset Value
XT16
0
SSM
0
SSI
0
IS11
0
IS10
0
IS01
0
IS00
0
SMS
0
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相关代理商/技术参数 |
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| ST72141K2B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M3/XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| ST72141K2M6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
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