参数资料
型号: ST72C314J4B1XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP42
封装: 0.600 INCH, PLASTIC, SDIP-42
文件页数: 97/153页
文件大小: 2235K
代理商: ST72C314J4B1XXX
ST72334J/N, ST72314J/N, ST72124J
48/153
MISCELLANEOUS REGISTERS (Cont’d)
MISCELLANEOUS REGISTER 2 (MISCR2)
Read /Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = Reserved
Must always be cleared
Bit 5:4 = BC[1:0]
Beep control
These 2 bits select the PF1 pin beep capability.
The beep output signal is available in ACTIVE-
HALT mode but has to be disabled to reduce the
consumption.
Bit 3:2 = Reserved
Must always be cleared
Bit 1 = SSM
SS mode selection
It is set and cleared by software.
0: Normal mode - SS uses information coming
from the SS pin of the SPI.
1: I/O mode, the SPI uses the information stored
into bit SSI.
Bit 0 = SSI
SS internal mode
This bit replaces pin SS of the SPI when bit SSM is
set to 1. (see SPI description). It is set and cleared
by software.
Table 10. Miscellaneous Register Map and Reset Values
70
-
BC1
BC0
-
SSM
SSI
Beep mode with fOSC=16MHz
BC1 BC0
Off
0
~2-KHz
Output
Beep signal
~50% duty cycle
01
~1-KHz
1
0
~500-Hz
1
Address
(Hex.)
Register
Label
76
54321
0
0020h
MISCR1
Reset Value
IS11
0
IS10
0
MCO
0
IS21
0
IS20
0
CP1
0
CP0
0
SMS
0
0040h
MISCR2
Reset Value
0
BC1
0
BC0
000
SSM
0
SSI
0
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